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Monitoring BGP
Use the show commands
in this section to monitor BGP activity.
 |
Note:
The E120 router and E320 router output for monitor and show commands is identical to output
from other E-series routers, except that the E120 and E320 router
output also includes information about the adapter identifier in the
interface specifier (slot/adapter/port).
|
Use the baseline ip bgp command to set the baseline on all BGP statistics.
You can use the output filtering feature of the show command to include or exclude lines of output
based on a text string you specify. See JUNOSe System Basics Configuration Guide,
for details.
Use the debug ip bgp command to get information
about problems with BGP or the network.
baseline ip bgp
- Use to set the baseline on all BGP statistics as the current
values.
- For example, if you issue the baseline ip
bgp command, all the current values of BGP statistics
become the baseline values. If the current value of the Total message sent parameter is
105, and the value goes up to 120 messages, the new value is displayed
as 15.
- Example
- host1#baseline ip bgp
- There is no no version.
- See baseline ip bgp.
debug ip bgp
- Use to display information about BGP logs for inbound
or outbound events, or both.
- Example
- host1#debug ip bgp
- There is no no version, but
you can use the undebug ip bgp command
to disable display of information previously enabled with the debug ip bgp command.
- See debug ip bgp.
default-fields peer
default-fields route
- Use to specify fields that are displayed by default by
any subsequently issued show ip bgp command
that displays BGP routes.
- Use the intro keyword to enable
the display of introductory information about BGP attributes.
- This command does not affect the output of the show ip bgp summary command.
- The order in which you specify the fields has no effect
on the order in which they are displayed.
- Example
host1:pe2(config-router)#default-fields route intro next-hop med loc-pref
weight as-path
host1:pe2#show ip bgp vpnv4 all
Local BGP identifier 2.2.2.2, local AS 100
6 routes (388 bytes)
7 destinations (560 bytes) of which 0 have a route
0 routes selected for route table installation
6 path attribute entries (936 bytes)
Local-RIB version 74. FIB version 74.
Prefix Next-hop MED LocPrf Weight AS-path
99.99.99.11/32 1.1.1.1 1 100 0 65011
99.99.99.12/32 1.1.1.1 0 100 0 empty
99.99.99.13/32 1.1.1.1 2 100 0 empty
99.99.99.21/32 21.21.21.2 1 0 65021
99.99.99.22/32 22.22.22.2 0 32768 empty
99.99.99.23/32 23.23.23.2 2 32768 empty
- Use the no version to remove
fields from the output of subsequently issued show ip
bgp commands that displays BGP routes.
- See default-fields route.
show ip as-path-access-list
show ip bgp
show bgp ipv6
- Use to display the BGP routing table.
- If you specify an IP address, displays the route that
best matches the specified IP address.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- Field descriptions
- Learned from peer—Peer from which route was learned
- Next hop IP address—IP address of the next router
that is used when a packet is forwarded to the destination network
- AS path—AS path through which this route has been
advertised
- Aggregator AS number—AS number of the AS that aggregated
this route
- Aggregate IP address—IP address of the router that
aggregated this route
- Origin—Origin of the route
- MED—Multiexit discriminator for the route
- LocPrf—Local preference for the route
- Weight—Weight of the route
- Communities—Community number associated with the
route
- Originator ID—Router ID of the router in the local
AS that originated the route
- Cluster ID list—List of cluster IDs through which
the route has been advertised
- Stale—Route has gone stale due to peer restart
- Example 1—Displays information about routes in the
IPv6 multicast address family
host1# show bgp ipv6 multicast
Local BGP identifier 10.13.13.13, local AS 400
4 routes (160 bytes)
4 destinations (288 bytes) of which 4 have a route
4 routes selected for route table installation
3 path attribute entries (456 bytes)
Local-RIB version 31. FIB version 31.
Status codes: > best, * invalid, s suppressed, d dampened, r rejected,
a auto-summarized
Prefix Peer Next-hop MED LocPrf Weight Origin
::103.103.103.0/120 103.103.103.3 ::103.103.103.3 0 0 inc.
> 3ffe:0:0:1::/64 11.11.11.11 ::101.101.101.1 0 100 0 inc.
> 3ffe:0:0:3::/64 103.103.103.3 ::103.103.103.3 0 0 inc.
> 3ffe:0:1:1::/64 12.12.12.12 ::102.102.102.2 0 100 0 inc.
- Example 2—Displays route information for prefix
10.88.88.1/32
host1:pe1#show ip bgp 10.88.88.1
BGP route information for prefix 10.88.88.1/32
Network route (best route
Advertised to both internal and external peers
Address Family Identifier (AFI) is ip-v4
Subsequent Address Family Identifier (SAFI) is unicast
Next hop IP address is 0.0.0.0 (metric 2)
Multi-exit discriminator is 1
Local preference is not present
Weight is 32768
Origin is IGP
AS path is empty
Extended communities empty
- Example 3—Displays information about IPv6 prefix
2001:0430::1/128
host1#show bgp ipv6 2001:0430::1/128
BGP route information for prefix 2001:1::1/128
Received route learned from internal peer 2.2.2.2 (best route)
Route placed in IP forwarding table
Best to advertise to external peers
Address Family Identifier (AFI) is ip-v6
Subsequent Address Family Identifier (SAFI) is unicast
MPLS in-label is none
MPLS out-label is 17
Next hop IP address is ::ffff:2.2.2.2 (metric 3)
Multi-exit discriminator is 0
Local preference is 100
Weight is 0
Origin is IGP
AS path is 65021
- Example 4—Displays information about next hop routers
for VRF PE 11 in the IPv4 VPN address family
host1:pe1#show ip bgp vpnv4 vrf pe11 next-hops
Indirect next-hop 11.11.11.2
Resolution in IP route table of VR pe11
Reachable (metric 0)
IP indirect next-hop index 35
Direct next-hop ATM2/0.11 (11.11.11.2)
Resolution in IP tunnel-route table of VR pe11
Not reachable
Reference count is 1
Indirect next-hop 2.2.2.2
Resolution in IP route table of VR pe1
IP indirect next-hop index 123
Reachable (metric 100)
Direct next-hop POS4/0 (10.10.10.1)
POS4/1 (12.12.12.1)
Resolution in IP tunnel-route table of VR pe1
MPLS indirect next-hop index 578
Reachable (metric 100)
Direct next-hop Push 23, POS4/0 (10.10.10.1)
Push 43, POS4/1 (12.12.12.1)
Reference count is 1
- Example 5—Displays information about routes in the
route-target address family
host1# show ip bgp route-target signaling
Local BGP identifier 13.13.13.13, local AS 100
4 routes (240 bytes)
3 destinations (228 bytes) of which 3 have a route
3 routes selected for route tables installation
0 unicast/multicast routes selected for route table installation
0 unicast/multicast tunnel-usable routes selected for route table installation
0 tunnel-only routes selected for tunnel-route table installation
10 path attribute entries (1520 bytes)
Local-RIB version 19. FIB version 19.
Status codes: > best, * invalid, s suppressed, d dampened, r rejected,
a auto-summarized
Prefix Peer Next-hop MED LocPrf Weight Origin
> 0:0:0/0 12.12.12.12 12.12.12.12 100 0 IGP
> 100:100:1/96 11.11.11.11 11.11.11.11 100 0 IGP
100:100:1/96 14.14.14.14 14.14.14.14 100 0 IGP
> 100:100:2/96 11.11.11.11 11.11.11.11 100 0 IGP
- Example 6—Displays information for routes in the
route-target address family corresponding to the specified RT-MEM-NLRI
host1#show ip bgp route-target signaling 100:100:1/96
BGP route information for prefix 100:100:1/96
Received route learned from internal peer 11.11.11.11 (best route)
Route not placed in IP forwarding table
Best to advertise to both internal and external peers
Address Family Identifier (AFI) is ip-v4
Subsequent Address Family Identifier (SAFI) is route-target-signaling
Next hop IP address is 11.11.11.11 (metric 0)
Multi-exit discriminator is not present
Local preference is 100
Weight is 0
Origin is IGP
AS path is empty
Received route learned from internal peer 14.14.14.14
Route not placed in IP forwarding table
Do not advertise to any peers
Address Family Identifier (AFI) is ip-v4
Subsequent Address Family Identifier (SAFI) is route-target-signaling
Next hop IP address is 14.14.14.14 (metric 0)
Multi-exit discriminator is not present
Local preference is 100
Weight is 0
Origin is IGP
AS path is empty
- Example 7—Displays for network routes in the route-target
address family
host1:pe1#show ip bgp route-target signaling network
Prefix Weight Route-map Backdoor
102:111:34/96 No
1111111111:23:1/96 No
host1:pe1#show ip bgp route-target signaling network 102:111:34
Prefix Weight Route-map Backdoor
102:111:34/96 No
- Example 8—Error message generated when a prefix
less than 32 or greater than 96 is specified for the RT-MEM-NLRI
host1#show ip bgp route-target signaling 100:100:1/31
^
% Invalid route-target membership NLRI
- You can use the field options to display filtered information
about a specified network or all networks in the BGP routing table.
Only the fields that you specify are displayed, except that the Prefix
field is always displayed.
- The stale field option shows
which routes are stale due to peer restart.
- Examples
host1:5#show ip bgp fields peer next-hop next-hop-cost
Prefix Peer Next-hop Next-hop-cost
11.11.11.11/32 3.3.3.3 3.3.3.3 Unreachable
11.11.11.11/32 4.4.4.4 4.4.4.4 Unreachable
22.22.22.22/32 3.3.3.3 3.3.3.3 Unreachable
22.22.22.22/32 4.4.4.4 4.4.4.4 Unreachable
33.33.33.33/32 3.3.3.3 3.3.3.3 Unreachable
44.44.44.44/32 4.4.4.4 4.4.4.4 Unreachable
55.55.55.55/32 0.0.0.0 0.0.0.0 0
66.66.66.66/32 6.6.6.6 6.6.6.6 Unreachable
77.77.77.77/32 57.57.57.7 57.57.57.7 1
88.88.88.88/32 57.57.57.7 57.57.57.7 1
host1:pe1#show ip bgp fields best peer next-hop stale
Prefix Stale Peer Next-hop
> 10.22.22.1/32 stale 10.12.12.2 10.12.12.2
> 10.22.22.2/32 stale 10.12.12.2 10.12.12.2
> 10.22.22.3/32 stale 10.12.12.2 10.12.12.2
> 10.33.33.1/32 10.13.13.3 10.13.13.3
> 10.33.33.2/32 10.13.13.3 10.13.13.3
> 10.33.33.3/32 10.13.13.3 10.13.13.3
- You can use the default-fields route command to specify default fields to be displayed by subsequently
issued show ip bgp commands.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option.
- Field descriptions for introductory fields displayed only
when the intro keyword has been issued
- Local BGP identifier—BGP router ID of the local
router
- routes—Total number of routes stored in the BGP
routing table and amount of memory consumed by routes. If several
peers have advertised a route to the same prefix, all routes are included
in this count.
- destinations—Number of routes to unique prefixes
stored in the BGP routing table and amount of memory consumed by routes.
If several peers have advertised a route to the same prefix, only
the best route is included in this count.
- routes selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table, plus prefixes for which there are currently no routes
but which have had to be withdrawn from peers to which these prefixes
may been previously advertised
- unicast/multicast routes selected for route table installation—Number
of unicast routes in the BGP routing table that have been inserted
into the IP routing table that are also available for use in the multicast
view of the IP routing table
- unicast/multicast tunnel-usable routes selected for route
table installation—Number of unicast and multicast routes in
the BGP routing table that have been inserted into the IP routing
table that are also available for use in the IP tunnel routing table
- tunnel-only routes selected for tunnel-route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP tunnel routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Local-RIB version—Number that is increased by one
each time a route in that RIB is added, removed or modified.
- FIB version—Number that is increased by one each
time BGP updates the routes in the IP routing table based on changes
in the local RIB. The FIB version matches the local-RIB version when
BGP has finished updating the routes in the IP route table. The FIB
version is less than the local-RIB version when BGP is still in the
process of updating the IP routing table.
- Statistics baseline set—Timestamp indicating when
the statistics baseline was last set
- Example
host1#show ip bgp 0.0.0.0 /0 fields intro
Local BGP identifier 192.168.254.79, local AS 6730
201058 routes (12063492 bytes)
201540 destinations (15317040 bytes) of which 201058 have a route
193909 routes selected for route tables installation
0 unicast/multicast routes selected for route table installation
0 unicast/multicast tunnel-usable routes selected for route table installation
0 tunnel-only routes selected for tunnel-route table installation
35097 path attribute entries (5334744 bytes)
Local-RIB version 20969483. FIB version 20969483.
Statistics baseline set WED JUL 12 2006 10:31:53 METDST
...
- See show ip bgp.
- See show bgp ipv6.
show ip bgp advertised-routes
show bgp ipv6 advertised-routes
- Use to display the routes in the specified neighbor’s
or peer group’s Adj-RIBs-Out table.
- For peers, the attributes displayed are those associated
with the route before the application of any outbound policy.
- For peer groups, the attributes displayed are those associated
with the route after the application of any outbound policy; that
is, the actual advertised attributes.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- You must first enable storage of routes to the Adj-RIBs-Out
tables with the no rib-out disable command or the no neighbor rib-out disable command. Otherwise, this command returns an error message.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Local BGP identifier—BGP router ID of the local
router
- routes—Total number of routes stored in the BGP
routing table. If several peers have advertised a route to the same
prefix, all routes are included in this count.
- distinct destinations—Number of routes to unique
prefixes stored in the BGP routing table. If several peers have advertised
a route to the same prefix, only the best route is included in this
count.
- routes selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Prefix—Prefix for the routing table entry
- Peer—IP address of BGP peer
- Next-hop—IP address of the next hop
- MED—Multiexit discriminator for the route
- LocPrf—Local preference for the route
- Weight—Assigned path weight
- Origin—Origin of the route
- Example
host1#show ip bgp neighbors 5.72.116.1 advertised-routes
Local BGP identifier 2.2.2.2, local AS 2222
0 routes (0 bytes used), 0 distinct destinations (0 bytes used)
0 routes selected for route table installation
0 path attribute entries (0 bytes used)
Status codes: > best, * invalid, s suppressed, d dampened, r rejected
Prefix Peer Next-hop MED LocPrf Weight Origin
> 0.0.0.0/0 5.72.116.1 5.72.1.1 0 IGP
> 10.10.0.87/32 5.72.116.1 5.72.1.1 0 inc.
> 13.13.13.13/32 5.72.116.1 5.72.1.1 0 IGP
> 33.0.0.0/16 0.0.0.0 5.72.1.1 1 32768 inc.
> 33.0.0.0/24 0.0.0.0 5.72.1.1 1 32768 inc.
> 44.44.0.0/16 5.72.116.1 5.72.1.1 0 inc.
- See show ip bgp advertised-routes.
- See show bgp ipv6 advertised-routes.
show ip bgp aggregate-address
show bgp ipv6 aggregate-address
show ip bgp cidr-only
- Use to display information about routes that have nonnatural
network masks.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Local BGP identifier—BGP router ID of the local
router
- routes—Total number of routes stored in the BGP
routing table. If several peers have advertised a route to the same
prefix, all routes are included in this count.
- distinct destinations—Number of routes to unique
prefixes stored in the BGP routing table. If several peers have advertised
a route to the same prefix, only the best route is included in this
count.
- routes selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Prefix—Prefix for the routing table entry
- Peer—IP address of BGP peer
- Next-hop—IP address of the next hop
- MED—Multiexit discriminator for the route
- LocPrf—Local preference for the route
- Weight—Assigned path weight
- Origin—Origin of the route
- Example
host1#show ip bgp cidr-only
Local BGP identifier 111.111.111.111, local AS 444
0 routes (0 bytes used), 0 distinct destinations (0 bytes used)
0 routes selected for route table installation
0 path attribute entries (0 bytes used)
Status codes: > best, * invalid, s suppressed, d dampened, r rejected
Prefix Peer Next-hop MED LocPrf Weight Origin
33.0.0.0/24 5.72.1.1 5.72.1.1 1 0 inc.
> 44.44.0.0/24 0.0.0.0 192.168.1.1 1 32768 inc.
- See show ip bgp cidr-only.
show ip bgp community
show bgp ipv6 community
- Use to display all routes that are members of the specified
BGP community. Does not accept regular expressions.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- Specify the community number in AA:NN format:
-
AA—Number that identifies
the autonomous system
-
NN—Number that identifies
the community within the autonomous system
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Local router ID—BGP router ID of the local router
- local AS—Local autonomous system number
- paths—Total number of routes stored in the BGP routing
table. If several peers have advertised a route to the same prefix,
all routes are included in this count.
- distinct prefixes—Number of routes to unique prefixes
stored in the BGP routing table. If several peers have advertised
a route to the same prefix, only the best route is included in this
count.
- paths selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Prefix—Prefix for the route table entry
- Peer—IP address of BGP peer
- Next-hop—IP address of the next hop
- MED—Multiexit discriminator
- CalPrf—Calculated preference
- Weight—Assigned path weight
- Origin—Origin of the route
- Example
host1#show ip bgp community 999:999
Local router ID 192.168.1.153, local AS 100
40845 paths, 40845 distinct prefixes (2940840 bytes used)
40845 paths selected for route table installation
13651 path attribute entries (1864908 bytes used)
Prefix Peer Next-hop MED CalPrf Weight Origin
> 24.0.0.0/12 10.5.0.48 10.5.0.48 100 100 IGP
> 24.4.252.0/22 10.5.0.48 10.5.0.48 100 100 IGP
> 24.6.0.0/23 10.5.0.48 10.5.0.48 100 100 IGP
> 24.6.11.0/24 10.5.0.48 10.5.0.48 100 100 IGP
- See show ip bgp community.
- See show bgp ipv6 community.
show ip bgp community-list
show bgp ipv6 community-list
- Use to display all routes that are members of communities
on the specified BGP community list.
- Accepts regular expressions.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Local router ID—BGP router ID of the local router
- local AS—Local autonomous system number
- paths—Total number of routes stored in the BGP routing
table. If several peers have advertised a route to the same prefix,
all routes are included in this count.
- distinct prefixes—Number of routes to unique prefixes
stored in the BGP routing table. If several peers have advertised
a route to the same prefix, only the best route is included in this
count.
- paths selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Prefix—Prefix for the routing table entry
- Peer—IP address of BGP peer
- Communities—Community number in AA:NN format:
-
AA—Number that identifies
the autonomous system
-
NN—Number that identifies
the community within the autonomous system
- Example
host1#show ip bgp community-list 1 fields peer communities
Local router ID 192.168.1.153, local AS 100
72077 paths, 72077 distinct prefixes (5189544 bytes used)
72077 paths selected for route table installation
21627 path attribute entries (2957324 bytes used)
Prefix Peer Communities
3.0.0.0/8 10.5.0.48 777:777 888:888
4.0.0.0/8 10.5.0.48 777:777 888:888
4.17.106.0/24 10.5.0.48 777:777 888:888
4.17.115.0/24 10.5.0.48 777:777 888:888
6.0.0.0/8 10.5.0.48 777:777 888:888
9.2.0.0/16 10.5.0.48 777:777 888:888
9.20.0.0/17 10.5.0.48 777:777 888:888
12.0.0.0/8 10.5.0.48 777:777 888:888
- See show ip bgp community-list.
- Seeshow bgp ipv6 community-list.
show ip bgp dampened-paths
show bgp ipv6 dampened-paths
- Use to display information about dampened routes.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Local router ID—IP address of the local router
- local AS—Number of the local AS
- Route flap dampening—Status of route flap dampening
(enabled or disabled)
- Decay half-life—Time (in minutes) after which a
penalty is decreased. After the route has been assigned a penalty,
the penalty is decreased by half after the half-life period (which
is 15 minutes by default).
- Cutoff threshold—Value of the penalty for a flapping
route below which the route is unsuppressed
- Reuse threshold—Time (in hours:minutes:seconds)
after which the path will be made available
- Maximum hold-down time—Interval, in seconds, after
not receiving a keepalive message that the software declares a peer
dead
- route flap history—Status of route flap history
for route paths
- Prefix—The prefix for the IP address
- Peer—IP address of the BGP peer
- Status—Status of route dampening of the route path
- Figure of Merit—A measure of the route's stability.
Higher values indicate more recent route flap activity or less stability.
- Time until Reuse/Remove—Time until the route is
either reused (if currently suppressed) or its history entry is removed
(if currently available)
- Example
host1#show ip bgp dampened-paths
Local router ID 192.168.1.218, local AS 100
Route flap dampening is enabled
Decay half-life is 10 minutes while reachable, 20 minutes while unreachable
Cuttoff threshold is 2000, reuse threshold is 750
Maximum hold-down time is 20 minutes
60 paths have active route flap histories (4560 bytes used)
11 paths are suppressed
Figure Time until
Prefix Peer Status of Merit Reuse/Remove
24.31.128.0/19 10.2.1.48 Suppressed/Reachable 2681 00:17:00
24.93.128.0/19 10.2.1.48 Suppressed/Reachable 2681 00:17:00
24.95.0.0/19 10.2.1.48 Suppressed/Reachable 2681 00:17:00
128.192.0.0/16 10.2.1.48 Available 1997 00:15:08
148.161.0.0/16 10.2.1.48 Available 1997 00:15:10
164.81.0.0/16 10.2.1.48 Available 1997 00:15:11
192.29.60.0/24 10.2.1.48 Available 1997 00:15:12
192.58.228.0/24 10.2.1.48 Available 1997 00:15:15
192.88.8.0/24 10.2.1.48 Available 1997 00:15:17
192.107.253.0/24 10.2.1.48 Suppressed/Unreachable 4331 00:19:42
192.195.44.0/24 10.2.1.48 Suppressed/Reachable 2923 00:19:15
192.195.49.0/24 10.2.1.48 Suppressed/Reachable 2923 00:19:15
192.195.50.0/24 10.2.1.48 Suppressed/Reachable 2923 00:19:15
192.197.150.0/24 10.2.1.48 Available 1997 00:15:25
192.222.89.0/24 10.2.1.48 Suppressed/Unreachable 2788 00:19:42
204.17.195.0/24 10.2.1.48 Suppressed/Reachable 2923 00:17:20
204.52.186.0/24 10.2.1.48 Available 1997 00:15:26
204.68.178.0/24 10.2.1.48 Available 1000 00:19:38
204.101.0.0/16 10.2.1.48 Available 1997 00:15:29
204.128.227.0/24 10.2.1.48 Suppressed/Reachable 2923 00:17:16
204.146.24.0/22 10.2.1.48 Available 1997 00:15:30
204.146.24.0/24 10.2.1.48 Available 1997 00:15:30
- See show ip bgp dampened-paths.
- See show bgp ipv6 dampened-paths.
show ip bgp filter-list
show bgp ipv6 filter-list
- Use to display all routes whose AS-path matches the specified
AS-path access list.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Local router ID—BGP router ID of the local router
- local AS—Local autonomous system number
- paths—Total number of routes stored in the BGP routing
table. If several peers have advertised a route to the same prefix,
all routes are included in this count.
- distinct prefixes—Number of routes to unique prefixes
stored in the BGP routing table. If several peers have advertised
a route to the same prefix, only the best route is included in this
count.
- paths selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Prefix—Prefix for the routing table entry
- Next-hop—IP address of the next hop
- MED—Multiexit discriminator
- CalPrf—Calculated preference
- Weight—Assigned path weight
- AS path—Autonomous system path
- Example
host1#show ip bgp filter-list 1
Local router ID 192.168.1.153, local AS 100
72080 paths, 72080 distinct prefixes (5189760 bytes used)
72080 paths selected for route table installation
21667 path attribute entries (2962828 bytes used)
Prefix Next-hop MED CalPrf Weight AS-path
> 6.0.0.0/8 10.5.0.48 100 100 11488 701 7018 7170
> 12.0.0.0/8 10.5.0.48 100 100 11488 701 1740 7018
> 12.1.248.0/24 10.5.0.48 100 100 11488 701 7018 13391
> 12.2.6.0/24 10.5.0.48 100 100 11488 701 7018 11101
> 12.2.7.0/24 10.5.0.48 100 100 11488 701 7018 11101
> 12.2.76.0/24 10.5.0.48 100 100 11488 701 7018 11812
> 12.2.99.0/24 10.5.0.48 100 100 11488 701 7018 10656
> 12.2.109.0/24 10.5.0.48 100 100 11488 701 7018 10656
> 12.2.169.0/24 10.5.0.48 100 100 11488 701 7018 11806
> 12.4.114.0/24 10.5.0.48 100 100 11488 701 7018 14065
> 12.4.119.0/24 10.5.0.48 100 100 11488 701 7018 14065
> 12.4.175.0/24 10.5.0.48 100 100 11488 701 7018 11895
> 12.4.196.0/22 10.5.0.48 100 100 11488 701 7018 12163
> 12.5.48.0/21 10.5.0.48 100 100 11488 701 7018 12163
> 12.5.164.0/24 10.5.0.48 100 100 11488 701 7018 11134
> 12.6.42.0/23 10.5.0.48 100 100 11488 701 7018 11090
- See show ip bgp filter-list.
- See show bgp ipv6 filter-list.
show ip bgp flap-statistics
show bgp ipv6 flap-statistics
- Use to display information about flap statistics.
- Field descriptions
- Local BGP identifier—BGP router ID of the local
router where route flap dampening is enabled
- local AS—Local autonomous system number
- Route flap dampening—Status of route flap dampening
(enabled or disabled)
- Default decay half-life—Time (in minutes) after
which a penalty is decreased. After the route has been assigned a
penalty, the penalty is decreased by half after the half-life period
(which is 15 minutes by default).
- Default cutoff threshold—Value of the penalty for
a flapping route below which the route is unsuppressed
- Default reuse threshold—Time in minutes after which
the path will be made available
- Default maximum hold-down time—Interval, in seconds,
after not receiving a keepalive message that the software declares
a peer dead
- route flap history—Status of route flap history
for route paths
- Prefix—Prefix for the routing table entry
- Peer—IP address of BGP peer
- Status—Status of route dampening of the route path
- Figure of Merit—Measure of the route's stability.
Higher values indicate more recent route flap activity or less stability.
- Time until Reuse/Remove—Time in hours:minutes:seconds
until the route is either reused (if currently suppressed) or its
history entry is removed (if currently available)
- Example
host1#show ip bgp flap-statistics
Local BGP identifier 192.168.1.232, local AS 100
Route flap dampening is enabled
Default decay half-life is 15 minutes
Default cutoff threshold is 2000, default reuse threshold is 750
Default maximum hold-down time is 60 minutes
307 paths have active route flap histories (27016 bytes used)
5 paths are suppressed
Figure Time until
Prefix Peer Status of Merit Reuse/Remove
24.201.0.0/18 192.168.1.158 Available 925 00:58:23
24.201.64.0/18 192.168.1.158 Available 925 00:58:23
52.128.224.0/19 192.168.1.158 Available 750 00:54:12
61.8.0.0/19 192.168.1.158 Available 993 00:59:53
61.8.30.0/24 192.168.1.158 Available 993 00:59:53
62.229.73.0/24 192.168.1.158 Unreachable 925 00:58:23
63.69.150.0/24 192.168.1.158 Available 750 00:54:12
- See show ip bgp flap-statistics.
- See show bgp ipv6 flap-statistics.
show ip bgp inconsistent-as
show bgp ipv6 inconsistent-as
- Use to display information about routes that have inconsistent
AS-paths.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Local BGP identifier—BGP router ID of the local
router
- local AS—Local autonomous system number
- routes—Total number of routes stored in the BGP
routing table. If several peers have advertised a route to the same
prefix, all routes are included in this count.
- distinct destinations—Number of routes to unique
prefixes stored in the BGP routing table. If several peers have advertised
a route to the same prefix, only the best route is included in this
count.
- routes selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Prefix—Prefix for the routing table entry
- Next-hop—IP address of the next hop
- MED—Multiexit discriminator for the route
- LocPrf—Local preference for the route
- Weight—Assigned path weight
- Origin—Origin of the route
- AS-path—AS-path through which this route bas been
advertised
- Example
host1#show ip bgp inconsistent-as
Local BGP identifier 192.168.1.10, local AS 123
0 routes (0 bytes used), 0 distinct destinations (0 bytes used)
0 routes selected for route table installation
0 path attribute entries (0 bytes used)
Status codes: > best, * invalid, s suppressed, d dampened, r rejected
Prefix Next-hop MED LocPrf Weight AS-path
> 4.0.0.0/8 0.0.0.0 1 32768 empty
4.0.0.0/8 192.168.1.1 0 11488 701 1
- See show ip bgp inconsistent-as.
- See show bgp ipv6 inconsistent-as.
show ip bgp
show bgp ipv6
- Use to display all routes with a prefix that is equal
to or more specific than the specified prefix.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgpshow ip bgp for descriptions of the fields displayed by this keyword.
- Field descriptions
- Local router ID—BGP router ID of the local router
- local AS—Local autonomous system number
- paths—Total number of routes stored in the BGP routing
table. If several peers have advertised a route to the same prefix,
all routes are included in this count.
- distinct prefixes—Number of routes to unique prefixes
stored in the BGP routing table. If several peers have advertised
a route to the same prefix, only the best route is included in this
count.
- paths selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Prefix—Prefix for the routing table entry
- Peer—IP address of BGP peer
- Next-hop—IP address of the next hop
- MED—Multiexit discriminator
- CalPrf—Calculated preference
- Weight—Assigned path weight
- Origin—Origin of the route
- Example
host1#show ip bgp 12.2.0.0 255.255.0.0 longer-prefixes
Local router ID 192.168.1.153, local AS 100
72074 paths, 72074 distinct prefixes (5189328 bytes used)
72074 paths selected for route table installation
21685 path attribute entries (2965327 bytes used)
Prefix Peer Next-hop MED CalPrf Weight Origin
> 12.2.6.0/24 10.5.0.48 10.5.0.48 100 100 IGP
> 12.2.7.0/24 10.5.0.48 10.5.0.48 100 100 IGP
> 12.2.76.0/24 10.5.0.48 10.5.0.48 100 100 IGP
> 12.2.88.0/22 10.5.0.48 10.5.0.48 100 100 IGP
> 12.2.97.0/24 10.5.0.48 10.5.0.48 100 100 IGP
> 12.2.99.0/24 10.5.0.48 10.5.0.48 100 100 IGP
> 12.2.109.0/24 10.5.0.48 10.5.0.48 100 100 IGP
> 12.2.169.0/24 10.5.0.48 10.5.0.48 100 100 IGP
- See show ip bgp.
- See show bgp ipv6.
show ip bgp neighbors
show bgp ipv6 neighbors
- Use to display information about BGP neighbors.
- Field descriptions
- BGP neighbor ID—BGP identifier of the BGP neighbor
- remote AS—Remote AS of the BGP neighbor
- Description—Textual description of the BGP neighbor
- Member of peer group—Name of the peer group of which
this BGP neighbor is a member
- Remote router ID—Router ID of the remote router
- negotiated BGP version—BGP version being used to
communicate with the neighbor
- Administrative status—Desired state of the peer
connection
- Connection state—Current state of the BGP connection
- Connection has been established—Time that TCP connection
was established
- Reason for last reset—Reason for last reset of the
BGP session
- TCP error code—TCP connection error type
- Default originate—Status of default originate (enabled
or disabled)
- EBGP multi-hop—Status of EBGP multihop (enabled
or disabled)
- IBGP single-hop—Status of IBGP single hop (enabled
or disabled)
- Next hop self—Status of next-hop self (enabled or
disabled)
- Route reflector status—Identifies the neighbor as
a route-reflector client
- Neighbor weight—Weight of routes from the BGP neighbor
- Incoming update distribute list—Distribute list
for incoming routes, if configured
- Outgoing update distribute list—Distribute list
for outgoing routes, if configured
- Incoming update filter list—Update filter list for
incoming routes, if configured
- Outgoing update filter list—Update filter list for
outgoing route, if configured
- Weight filter list—Weight filter list for routes,
if configured
- Incoming route map—Incoming route map, if configured
- Outgoing route map—Outgoing route map, if configured
- Connect retry interval—Time between a BGP peer’s
attempts to reestablish a connection to the neighbor
- Minimum route advertisement interval—Minimum time
between route advertisements
- Minimum AS origination interval—Minimum time between
advertisement of changes within the speaker’s AS
- Configured keep-alive interval—Frequency of keep-alive
messages generated
- Negotiated keepalive interval—Negotiated frequency
of keep-alive messages generated
- Configured hold time—Configured maximum time allowed
between received messages
- Negotiated hold time—Negotiated maximum time allowed
between received messages
- Configured update source IP address—IP address used
when sending update messages
- Local IP address—Local IP address used for TCP communication
to this peer
- Local port—Local TCP port number used for TCP communication
to this peer
- Remote IP address—Remote IP address used for TCP
communication to this peer
- Remote port—Remote IP address used for TCP communication
to this peer
- Total messages sent—Total BGP messages sent to this
neighbor
- Total messages received—Total BGP messages received
from this neighbor
- Total update messages sent—Total BGP update messages
sent to this neighbor
- Total update messages received—Total BGP update
messages received from this neighbor
- Time since last update message was received—Time
since last BGP update message was received from this neighbor
- Address Family dependent capabilities—Lists type
of ORF send and receive capability per address family and whether
it is advertised (configured) or received
- Maximum number of ORF entries—Limit of ORF entries
that will be accepted from the neighbor
- Capability advertisement—Lists whether the specific
capability (capabilities option, deprecated dynamic capability negotiation,
dynamic capability negotiation, multiprotocol extensions, route refresh,
route refresh (Cisco proprietary), four octet AS numbers, and graceful
restart) has been sent, received, or both
- Multi-protocol extensions negotiation—Lists the
relevant address family and whether it has been sent, received, or
used
- BFD—Status of BFD configuration, enabled, enabled
but not supported because the peer is an IBGP neighbor a multihop
EBGP neighbor, or disabled
- BFD session—Type and address of peer to which BFD
session is established
- Minimum transmit interval—Desired interval between
BFD packets transmitted to members of peer group
- Minimum receive interval—Desired interval between
BFD packets received from members of peer group
- Multiplier—Number of BFD packets that can be missed
before declaring BFD session down
- Negotiated detection time—Interval between BFD packets
negotiated by peers
- Advertise-map—Name of route map that specifies routes
to be advertised when routes in conditional route maps are matched
- Condition-map—Name of route map that specifies routes
to be matched by routes in the BGP routing table
- Sequence—Position of the specified advertise route
map in a list of advertise route maps configured for a particular
peer within the same address-family. A lower sequence number has a
higher priority; that route map is processed before one with a higher
sequence number.
- Status—Status of the routes specified by the route
map, advertise (route map condition has been met) or withdraw (route
map condition has not been met; regardless of this status, the specified
routes might be governed by another route map with a lower sequence
number and actually advertised or not according to that map
- Example
host1#show ip bgp neighbors
BGP neighbor ID 10.2.1.48, remote AS 11488 (external peer)
Remote router ID is 172.31.1.48, negotiated BGP version is 4
Administrative status is Start, connection state is Established
Reason for last reset was tcp connection error
TCP error code 60 (Connection timed out)
Connection has been established 1 time, up for 0 17:42:31
Options:
Default originate is disabled
EBGP multi-hop is enabled
IBGP single-hop is disabled
Next hop self is disabled
seconds
Policy:
Neighbor weight is 100
Timers:
Connect retry interval is 120 seconds
Minimum route advertisement interval is 30 seconds
Minimum AS origination interval is 10 seconds
Configured keep-alive interval is 30 seconds, negotiated 30
seconds
Configured hold time is 90 seconds, negotiated 90
TCP connection:
Local IP address is 192.168.1.218, local port is 1024
Remote IP address is 10.2.1.48, remote port is 179
Statistics:
Total of 4100 messages sent, 44913 messages received
2053 update messages sent, 42785 update messages received
0 00:00:17 since last update message was received
- Fields relevant to multiprotocol extensions:
Multi-protocol extensions negotiation:
ip-v4 unicast: sent, received, used
ip-v6 unicast-labeled: sent, received, used
- For the graceful restart capability, additional information
is presented.
- Fields concerning graceful restart attributes that apply
to peers as a whole (for all address families):
Graceful restart negotiation:
Sent restart time is 120 seconds
Sent restart state bit is zero (we are not restarting)
Received restart time is 120 seconds
Received restart state bit is zero (peer is not restarting)
Maximum time for keeping stale paths is 360 seconds
- Fields concerning attributes that apply to peers a particular
address family:
Peer is capable of preserving forwarding stat(3)
Peer preserved forwarding state during last restart
We have received an end-of-rib marker from the peer
We have sent an end-of-rib marker to the peer
- Fields relevant if the peer is currently restarting:
Graceful restart waiting for the session to come back up
Restart-time advertised by the peer is 120 seconds
Remaining time for the peer to come back up is 117 seconds
Remaining time for keeping stale routes from the peer is 357 seconds
- Fields relevant during reconvergence after the peer has
restarted:
Graceful restart negotiation:
Sent restart time is 120 seconds
Sent restart state bit is zero (we are not restarting)
Received restart time is 120 seconds
Received restart state bit is zero (peer is not restarting)
Maximum time for keeping stale paths is 300 seconds
Remaining time for keeping stale routes from the peer is 297 seconds
- For BFD, additional information is presented.
- Fields relevant to BFD when BFD is not configured:
BFD is disabled
- Fields relevant to BFD when BFD is configured for an IBGP
peer:
BFD is enabled but not supported (IBGP neighbor)
- Fields relevant to BFD when BFD is configured for a multihop
EBGP peer:
BFD is enabled but not supported (multi-hop EBGP neighbor)
- Fields relevant to BFD when BFD is configured but the
BGP session is not established:
BFD is enabled:
Single-hop IPv4 BFD session to 1.2.3.4
Minimum transmit interval is 300 ms
Minimum receive interval is 300 ms
Multiplier is 3
Waiting for BGP to become established before initiating BFD session
- Fields relevant to BFD when BFD is configured, the BGP
session is established, but the BFD protocol session is not up:
BFD is enabled:
Single-hop IPv4 BFD session to 1.2.3.4
Minimum transmit interval is 300 ms
Minimum receive interval is 300 ms
Multiplier is 3
BFD session is down
- Fields relevant to BFD when BFD is configured, the BGP
session is established, and the BFD protocol session is up:
BFD is enabled:
Single-hop IPv4 BFD session to 1.2.3.4
Minimum transmit interval is 300 ms
Minimum receive interval is 300 ms
Multiplier is 3
BFD session is up for 00:00:50
Negotiated detection time is 900 ms
- Fields relevant to conditional advertisement:
Advertise-map is advertisetoR1
Condition-map: trigger1
Sequence: 5
Status: Withdraw
Advertise-map is alternatetoR1
Condition-map: trigger2
Sequence: 10
Status: Advertise
- See show ip bgp neighbors.
- See show bgp ipv6 neighbors.
show ip bgp neighbors dampened-routes
show bgp ipv6 neighbors dampened-routes
- Use to display information about routes with a dampening
history for the specified BGP neighbor.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Local BGP identifier—BGP router ID of the local
router
- routes—Total number of routes stored in the BGP
routing table. If several peers have advertised a route to the same
prefix, all routes are included in this count.
- distinct destinations—Number of routes to unique
prefixes stored in the BGP routing table. If several peers have advertised
a route to the same prefix, only the best route is included in this
count.
- routes selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Prefix—Prefix for the routing table entry
- Peer—IP address of BGP peer
- Next-hop—IP address of the next hop
- MED—Multiexit discriminator for the route
- LocPrf—Local preference for the route
- Weight—Assigned path weight
- Origin—Origin of the route
- Example
host1#show ip bgp neighbors 192.168.1.158 dampened-routes
Local BGP identifier 192.168.1.232, local AS 100
120 routes (5760 bytes used), 94 distinct destinations (9024 bytes used)
67 routes selected for route table installation
23 path attribute entries (3450 bytes used)
Status codes: > best, * invalid, s suppressed, d dampened, r rejected
Prefix Peer Next-hop MED LocPrf Weight Origin
d12.8.12.0/24 192.168.1.158 192.168.1.1 0 IGP
d24.48.12.0/24 192.168.1.158 192.168.1.1 0 IGP
d24.72.12.0/24 192.168.1.158 192.168.1.1 0 inc.
d24.116.12.0/23 192.168.1.158 192.168.1.1 0 IGP
d24.143.12.0/24 192.168.1.158 192.168.1.1 0 IGP
d24.154.12.0/24 192.168.1.158 192.168.1.1 0 inc.
d24.216.12.0/24 192.168.1.158 192.168.1.1 0 IGP
d24.240.12.0/24 192.168.1.158 192.168.1.1 0 IGP
d24.244.12.0/22 192.168.1.158 192.168.1.1 0 IGP
d24.246.12.0/22 192.168.1.158 192.168.1.1 0 IGP
d61.0.12.0/24 192.168.1.158 192.168.1.1 0 IGP
d61.11.12.0/24 192.168.1.158 192.168.1.1 0 IGP
d62.74.12.0/22 192.168.1.158 192.168.1.1 0 IGP
d62.76.12.0/22 192.168.1.158 192.168.1.1 0 IGP
d63.65.12.0/24 192.168.1.158 192.168.1.1 0 inc.
d63.73.12.0/24 192.168.1.158 192.168.1.1 0 IGP
- See show ip bgp neighbors dampened-routes.
- See show bgp ipv6 neighbors dampened-routes.
show ip bgp neighbors paths
show bgp ipv6 neighbors paths
show ip bgp neighbors received prefix-filter
show ip bgp neighbors received-routes
show bgp ipv6 neighbors received-routes
- Use to display routes originating from the specified BGP
neighbor before inbound policy is applied.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Prefix—Prefix for the routing table entry
- Peer—IP address of BGP peer
- Next-hop—IP address of the next hop
- MED—Multiexit discriminator for the route
- LocPrf—Local preference for the route
- Weight—Assigned path weight
- Origin—Origin of the route
- Example
host1#show ip bgp neighbors 192.168.1.158 received-routes
Local BGP identifier 111.111.111.111, local AS 444
0 routes (0 bytes used), 0 distinct destinations (0 bytes used)
0 routes selected for route table installation
0 path attribute entries (0 bytes used)
Status codes: > best, * invalid, s suppressed, d dampened, r rejected
Prefix Peer Next-hop MED LocPrf Weight Origin
>0.0.0.0/0 192.168.1.158 192.168.1.158 0 IGP
>13.13.13.13/32 192.168.1.158 192.168.1.158 0 0 IGP
- See show ip bgp neighbors received-routes.
- See show bgp ipv6 neighbors received-routes.
show ip bgp neighbors routes
show bgp ipv6 neighbors routes
- Use to display, after inbound policy is applied, all routes
that originate from the specified BGP neighbor.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- Field descriptions
- Local router ID—BGP router ID of the local router
- local AS—Local autonomous system number
- paths—Total number of routes stored in the BGP routing
table. If several peers have advertised a route to the same prefix,
all routes are included in this count.‘
- distinct prefixes—Number of routes to unique prefixes
stored in the BGP routing table. If several peers have advertised
a route to the same prefix, only the best route is included in this
count.
- paths selected for route table installation—Number
of routes in the BGP routing table that have been inserted into the
IP routing table
- path attribute entries—Number of distinct path attributes
stored in BGP's internal path attributes table. If BGP receives two
routes for different prefixes but with identical path attributes,
BGP will create only one entry in its internal path attribute table
and share it between the two routes to conserve memory.
- Local-RIB version—Number that is increased by one
each time a route in that RIB is added, removed or modified.
- FIB version—Number that is increased by one each
time BGP updates the routes in the IP routing table based on changes
in the local RIB. The FIB version matches the local-RIB version when
BGP has finished updating the routes in the IP route table. The FIB
version is less than the local-RIB version when BGP is still in the
process of updating the IP routing table.
- Prefix—Prefix for the routing table entry
- Peer— IP address of BGP peer
- Next-hop—IP address of the next hop
- MED—Multiexit discriminator
- CalPrf—Calculated preference
- Weight—Assigned path weight
- Origin—Origin of the route
- Example
host1#show bgp ipv6 neighbors 12.12.12.12 routes
Local BGP identifier 11.11.11.11, local AS 400
5 routes (200 bytes)
5 destinations (360 bytes) of which 5 have a route
5 routes selected for route table installation
4 path attribute entries (608 bytes)
Local-RIB version 33. FIB version 33.
Status codes: > best, * invalid, s suppressed, d dampened, r rejected,
a auto-summarized
Prefix Peer Next-hop MED LocPrf Weight Origin
> 3ffe:0:1:1::/64 12.12.12.12 ::102.102.102.2 0 100 0 inc.
- See show ip bgp neighbors routes.
- See show bgp ipv6 neighbors routes.
show ip bgp network
show bgp ipv6 network
show ip bgp next-hops
show bgp ipv6 next-hops
- Use to display information about BGP next hops.
- Specify all indirect next hops or a particular indirect
next hop.
- Example
host1:3#show ip bgp next-hops
Indirect next-hop 4.4.4.4
Reachable (metric 2)
Direct next-hop atm2/0.34 (34.34.34.4)
Reference count is 3
Indirect next-hop ::ffff:2.2.2.2
MPLS stacked label 17
Reachable (metric 3)
Direct next-hop tun mpls:vpnInL17-23
Reference count is 1
Indirect next-hop 5.5.5.5
Reachable (metric 2)
Direct next-hop atm2/0.35 (35.35.35.5)
Reference count is 3
Indirect next-hop 6.6.6.6
Reachable (metric 3)
Direct next-hop atm2/0.34 (34.34.34.4)
atm2/0.35 (35.35.35.5)
Reference count is 3
Indirect next-hop 13.13.13.1
Not reachable
Reference count is 2
- See show ip bgp next-hops.
- See show bgp ipv6 next-hops.
show ip bgp paths
show bgp ipv6 paths
show ip bgp peer-group
show bgp ipv6 peer-group
- Use to display information about BGP peer groups.
- Field descriptions
- BGP peer group—Name of a BGP peer group
- remote AS—Number of the remote AS
- Description—Textual description of the BGP peer
group
- Members—IP addresses of the members of the BGP peer
group
- Default originate—Status of default origination
of the BGP peer group
- EBGP multi-hop—Status of EBGP multihop for the peer
group
- IBGP single-hop—Status of IBGP single hop for the
peer group
- BFD—Status of BFD configuration for the peer group
- BFD session—Type and address of peer to which BFD
session is established
- Minimum transmit interval—Desired time interval
between BFD packets transmitted to members of peer group
- Minimum receive interval—Desired time interval between
BFD packets received from members of peer group
- Multiplier—Number of BFD packets that can be missed
before declaring BFD session down
- Next hop self—Status of next-hop self information
for the peer group
- Peers are route reflector clients—BGP peer group
is configured as a route reflector. This field does not appear when
route reflectors are not configured.
- weight—Neighbor weights assigned to BGP peer groups
- Incoming update distribute list—Distribute lists
for incoming routes, if configured
- Outgoing update distribute list—Distribute list
for outgoing routes, if configured
- Incoming update filter list—Filter list for incoming
routes, if configured
- Outgoing update filter list—Filter list for outgoing
routes, if configured
- Weight filter list—Weight filter list for routes,
if configured
- Incoming route map—Incoming route map, if configured
- Outgoing route map—Outgoing route map, if configured
- Minimum route advertisement interval—Minimum time
between route advertisements
- Configured update source IP address—IP address used
when sending update messages
- Advertise-map—Name of route map that specifies routes
to be advertised when routes in conditional route maps are matched
- Condition-map—Name of route map that specifies routes
to be matched by routes in the BGP routing table
- Sequence—Position of the specified advertise route
map in a list of advertise route maps configured for a particular
peer group within the same address-family. A lower sequence number
has a higher priority; that route map is processed before one with
a higher sequence number.
- Status—Status of the routes specified by the route
map, advertise (route map condition has been met) or withdraw (route
map condition has not been met; regardless of this status, the specified
routes might be governed by another route map with a lower sequence
number and actually advertised or not according to that map
- Example
host1#show ip bgp peer-group
BGP peer-group leftcoast, remote AS 200
Peer-group members are external peers
Local AS 100
Administrative status is Start
EBGP multi-hop is disabled
IBGP single-hop is disabled
BFD is enabled:
Single-hop IPv4 BFD session
Minimum transmit interval is 300 ms
Minimum receive interval is 300 ms
Multiplier is 3
Maximum update message size is 1024 octets
Neighbor weight is 0
Connect retry interval is 10 seconds initially
Configured keep-alive interval is 30 seconds
Configured hold time is 90 seconds
Minimum route advertisement interval is 30 seconds
Minimum AS origination interval is 10 seconds
Graceful restart negotiation:
Restart time is 120 seconds
Stale paths time is 360 seconds
Configuration for address family ipv4:unicast
RIB-out is disabled
Default originate is disabled
Next hop self is disabled
Next hop unchanged is disabled
Don't send communities
Inbound soft reconfiguration is disabled
Private AS number stripping is disabled
Override site AS with provider AS is disabled
No loops in the received AS-path are allowed
Members: 10.2.2.2 10.3.3.3
- Fields relevant to conditional advertisement:
Advertise-map is advertisetoR1
Condition-map: trigger1
Sequence: 5
Status: Withdraw
Advertise-map is alternatetoR1
Condition-map: trigger2
Sequence: 10
Status: Advertise
- See show ip bgp peer-group.
- See show bgp ipv6 peer-group.
show ip bgp quote-regexp
show bgp ipv6 quote-regexp
- Use to display information about BGP routes whose AS-path
matches the specified regular expression.
- Use with only a single regular expression element.
- You can use output filtering.
- You must enclose any elements containing a space within
quotation marks (“ element” ).
- Regular expressions match numbers for which the specified
path is a substring—for example, if you specify 20, 200 matches because 20 is a substring of 200. You can disallow substring
matching by using the underscore (_) metacharacter
to constrain matching to the specified pattern, for example, _20_.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- See show ip bgp quote-regexp.
- See show bgp ipv6 quote-regexp.
show ip bgp regexp
show bgp ipv6 regexp
- Use to display information about BGP routes whose AS-path
matches the specified regular expression.
- Use with one or more regular expression elements.
- You cannot use output filtering.
- You do not have to enclose elements containing a space
within quotation marks.
- Regular expressions match numbers for which the specified
path is a substring—for example, if you specify 20, 200 matches because 20 is a substring of 200. You can disallow substring
matching by using the underscore (_) metacharacter
to constrain matching to the specified pattern, for example, _20_.
- Reports whether the indirect next hop of a route is unreachable;
if not, displays the IGP cost to the indirect next hop.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- See show ip bgp regexp.
- See show bgp ipv6 regexp.
Examples for regexp and quote-regexp
In many cases, you can use either show ip bgp regexp or show ip bgp quote-regexp with the same results. For example, to show all routes whose AS-path
starts with 200 you can use either command as follows:
host1#show ip bgp regexp ^200
Local router ID 192.168.1.232, local AS 100
6 paths, 3 distinct prefixes (324 bytes used)
3 paths selected for route table installation
7 path attribute entries (872 bytes used)
Prefix Next-hop MED CalPrf Weight AS-path
10.99.1.2/32 10.1.1.2 100 100 200
10.99.1.3/32 10.1.1.2 100 100 200 10
10.99.1.4/32 10.1.1.2 100 100 200 10 20
host1#show ip bgp quote-regexp ^200
Local router ID 192.168.1.232, local AS 100
6 paths, 3 distinct prefixes (324 bytes used)
3 paths selected for route table installation
7 path attribute entries (872 bytes used)
Prefix Next-hop MED CalPrf Weight AS-path
10.99.1.2/32 10.1.1.2 100 100 200
10.99.1.3/32 10.1.1.2 100 100 200 10
10.99.1.4/32 10.1.1.2 100 100 200 10 20
If the regular expression contains one or more
spaces, you must place quotation marks around the expression in the show ip bgp quote-regexp command but not in the show ip bgp regexp command. For example, to show all
routes whose AS-path contains AS number 10 followed immediately by
AS number 20:
host1#show ip bgp regexp 10 20
Local router ID 192.168.1.232, local AS 100
6 paths, 3 distinct prefixes (324 bytes used)
3 paths selected for route table installation
7 path attribute entries (872 bytes used)
Prefix Next-hop MED CalPrf Weight AS-path
10.99.1.4/32 10.1.1.2 100 100 200 10 20
host1#show ip bgp quote-regexp 10 20
^
% Invalid input detected at '^' marker.
host1#show ip bgp quote-regexp “ 10 20"
Local router ID 192.168.1.232, local AS 100
6 paths, 3 distinct prefixes (324 bytes used)
3 paths selected for route table installation
7 path attribute entries (872 bytes used)
Prefix Next-hop MED CalPrf Weight AS-path
10.99.1.4/32 10.1.1.2 100 100 200 10 20
The show ip bgp regexp command accepts multiple strings as arguments. If you try to apply
output filtering, the command interprets the filter information as
a regular expression and fails:
host1#show ip bgp regexp ^200 | begin Prefix
% invalid regular expression
Because the show ip bgp quote-regexp command accepts only one string as an argument to the regular expression,
output filtering is possible:
host1#show ip bgp quote-regexp ^200 | begin Prefix
Prefix Next-hop MED CalPrf Weight AS-path
10.99.1.2/32 10.1.1.2 100 100 200
10.99.1.3/32 10.1.1.2 100 100 200 10
10.99.1.4/32 10.1.1.2 100 100 200 10 20
show ip bgp summary
show bgp ipv6 summary
- Use to summarize the status of all BGP neighbors.
- You can use the field options to display filtered information
about BGP neighbors.
- If you filter the display with field options, the usual
introductory information about BGP attributes is displayed only if
you issue the intro fields option. See show ip bgp for descriptions of the fields
displayed by this keyword.
- You can use the default-fields peer command to specify default fields to be displayed by subsequently
issued show ip bgp summary commands.
- Field descriptions
- Local router ID—Router ID of the local router
- Local AS—AS number of local router
- Administrative state—BGP administrative state, start
or stop
- BGP Operational state—Operational state, up, down,
or overload
- Shutdown in overload state—Status, enabled or disabled
- Default local preference—Default value for local
preference
- IGP synchronization—Synchronization status, enabled
or disabled
- Default originate—Whether network 0.0.0.0 is redistributed
into BGP (enabled) or not (disabled)
- Auto-summary—Status of auto summarization of routes
redistributed into BGP
- Always compare MED—Status, enabled or disabled
- Compare MED within confederation—Status, enabled
or disabled
- Advertise inactive routes—Status, enabled or disabled
- Advertise best external route to internal peer—Status,
enabled or disabled
- Enforce first AS—Status, enabled or disabled
- Missing MED as worst—Status, enabled or disabled
- Route flap dampening—Status, enabled or disabled
- Maximum number of equal-cost EBGP paths—Number of
paths
- Maximum number of equal-cost IBGP paths—Number of
paths
- Log neighbor changes—Status, enabled or disabled
- Fast External Fallover—Status, enabled or disabled
- No maximum received AS-path length—Indicates whether
limit is set for AS path length and, if set, the limit
- BGP administrative distances—Distances for external,
internal, and local BGP routes
- Router is a route reflector—Indicates whether the
router has been configured as a route reflector
- Client-to-client reflection—Whether client-to-client
reflection is configured (enabled) or not (disabled)
- Cluster ID—Identifying number for cluster ID
- Route-target filter—Status, enabled or disabled
- Default IPv4-unicast—Status, enabled or disabled
- Redistribution of iBGP routes—Status, enabled or
disabled
- Check reachability of next-hops for VPN routes—Status,
enabled or disabled
- Graceful restart—Status, enabled or disabled
- Global graceful-restart restart time—Time in seconds
- Global graceful-restart stale paths time—Time in
seconds
- Graceful-restart path selection defer time—Time
in seconds
- Route Distinguisher—RD assigned to the VRF
- Confederation ID—Confederation ID
- Confederation peers—Confederation peers
- Import route map—Route map associated with the VRF
that filters and modifies routes imported to the VRF from the global
BGP VPN RIB. The map applies to both IPv4 and IPv6 routes, unless
the field name is preceded by IPv4 (applies the map to only IPv4 routes)
or IPv6 (applies the map to only IPv6 routes).
- Export route map—Route map associated with the VRF
that modifies and filters routes exported by the VRF to the global
BGP VPN RIB. The map applies to both IPv4 and IPv6 routes, unless
the field name is preceded by IPv4 (applies the map to only IPv4 routes)
or IPv6 (applies the map to only IPv6 routes). The can filter routes
text appears only if the filter keyword
was issued for export map.
- Global import route map—Route map associated with
the VRF that modifies routes imported to the VRF from the global BGP
non-VPN RIB. The map applies to both IPv4 and IPv6 routes, unless
the field name is preceded by IPv4 (applies the map to only IPv4 routes)
or IPv6 (applies the map to only IPv6 routes).
- routes imported from global table—Number of routes
imported from the global BGP non-VPN RIB; also lists the maximum number
of routes that can be imported
- Global export route map—Route map associated with
the VRF that modifies routes exported by the VRF to the global BGP
non-VPN RIB. The map applies to both IPv4 and IPv6 routes, unless
the field name is preceded by IPv4 (applies the map to only IPv4 routes)
or IPv6 (applies the map to only IPv6 routes).
- Local-RIB version—Number that is increased by one
each time a route in that RIB is added, removed or modified.
- FIB version—Number that is increased by one each
time BGP updates the routes in the IP routing table based on changes
in the local RIB. The FIB version matches the local-RIB version when
BGP has finished updating the routes in the IP route table. The FIB
version is less than the local-RIB version when BGP is still in the
process of updating the IP routing table.
- Neighbor—BGP neighbors
- AS—AS number of the peer
- Ver—Negotiated BGP version number
- State—State of the connection
- Up/down time—Time the connection has been up or
down
- Messages sent—Number of messages sent to peer
- Messages received—Number of messages received from
peer
- Prefixes received—Number of prefixes received from
peer
- Rib Ver—Last RIB version queued to be sent to peer
- Send Q—Number of messages queued to be sent to peer
- More InQ—Status indicating whether any messages
are waiting to be sent to peer
- Example 1
host1#show bgp ipv6 summary
Local router ID 10.13.13.13, local AS 400
Administrative state is Start
BGP Operational state is Up
Shutdown in overload state is disabled
Default local preference is 100
IGP synchronization is disabled
Default originate is disabled
Always compare MED is disabled
Compare MED within confederation is disabled
Advertise inactive routes is disabled
Advertise best external route to internal peers is disabled
Enforce first AS is disabled
Missing MED as worst is disabled
Route flap dampening is disabled
Maximum number of equal-cost EBGP paths is 2
Maximum number of equal-cost IBGP paths is 2
Log neighbor changes is disabled
Fast External Fallover is disabled
No maximum received AS-path length
BGP administrative distances are 20 (ext), 200 (int), and 200 (local)
Client-to-client reflection is enabled
Cluster ID is 10.13.13.13
Route-target filter is enabled
Default IPv4-unicast is enabled
Redistribution of iBGP routes is disabled
Graceful restart is globally disabled
Global graceful-restart restart time is 120 seconds
Global graceful-restart stale paths time is 360 seconds
Graceful-restart path selection defer time is 360 seconds
This platform supports only the receiver role of graceful restart
Route Distinguisher: 100:11
Import route map: test2-import-map
Export route map: test1-export-map (can not filter routes)
Global import route map: test3-global-import-map
103 routes imported from global table (max 5000 routes allowed)
Global export route map: test4-global-export-map
Local-RIB version 7. FIB version 7.
Messages Messages Prefixes
Neighbor AS State Up/down time Sent Received Received
11.11.11.11 400 Established 00:36:19 78 81 2
12.12.12.12 400 Established 00:36:21 78 78 1
103.103.103.3 300 Established 00:36:34 85 80 2
- Example 2—Status of next hop reachability checking
is displayed only if you specify vpnv4.
host1#show ip bgp vpnv4 all summary
Local router ID 10.13.5.19, local AS 100
Administrative state is Start
BGP Operational state is Up
...
Default IPv4-unicast is enabled
Redistribution of iBGP routes is disabled
Check reachability of next-hops for VPN routes is enabled
...
- Example 3—Status of fields related to enabling local
AS numbers to be received in routes
host1#show ip bgp summary fields remote-as state rib-version
send-queue-length more-in-queue
Send More
Neighbor AS State RIB Ver Q InQ
2.2.2.2 100 Established 2 0 no
- See show ip bgp summary.
- See show bgp ipv6 summary.
show ip community-list
undebug ip bgp
- Use to disable the display of information about BGP logs
that was previously enabled with the debug ip bgp command.
- Example
- host1#undebug ip bgp
- There is no no version.
- See undebug ip bgp.
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