Monitoring Routing Policy

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Monitoring Routing Policy
You can monitor the following aspects of routing policy using show commands:

Access lists
host1#show access-list
host1#show ip as-path access-list
Community lists
host1#show ip community-list
Prefix lists
host1#show ip prefix-list
Prefix trees
host1#show ip prefix-tree
Protocols
host1#show ip protocols
Redistribution policies
host1#show ip redistribute
Routes
host1#show ip route
Interfaces and next hops
host1#show ip route slot 5 192.168.5.4
Route maps
host1#show route-map
Static routes
host1#show ip static
IP traffic
host1#show ip traffic
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. Refer to ERX System Basics Configuration Guide, Chapter 2, Command Line Interface, for details.

show access-list

Use to display information about access lists.

The displayed information includes the instances of each access list.

Use the detail keyword to display the automatically assigned element ID for each access-list entry. Only rules that you explicitly create have element IDs.

Example
host1#show access-list
IP Access List 1:
    permit ip host 172.31.192.217 any
    permit ip 12.40.0.0 0.0.0.3 any
    deny ip any any
IP Access List 2:
    permit ip 172.19.0.0 0.0.255.255 any
    deny ip 0.0.0.0 255.255.255.255 any
IP Access List 10:
    permit ip any any
IP Access List 11:
    deny ip any any
host1#show access-list detail
IP Access List 1:
    1: permit ip host 172.31.192.217 any
    2: permit ip 12.40.0.0 0.0.0.3 any
    deny ip any any
show ip as-path-access-list

Use to display information about AS-path access lists.

Example
host1#show ip as-path-access-list
AS Path Access List 1:
    permit  .*
AS Path Access List 2:
    deny  .*
AS Path Access List 3:
    permit  _109_
    deny  .*
AS Path Access List 4:
    permit  _109$
    deny  .*
AS Path Access List 10:
    deny  _109$
    permit  ^108_
    deny  .*
show ip community-list

Use to display community list information.

Display varies based on whether you issued the ip bgp community new-format command.

Example 1. If you did not issue the ip bgp community new-format command, the display appears as follows:
host1#show ip community-list
Community List 1:
    permit  81200109
    permit  81200110
    permit  81200108
Community List 2:
    deny  81200109
    permit  81200110
    permit  81200108
Community List 4:
    permit local-as
Community List 5:
    permit no-advertise
Community List 6:
    permit no-export
Community List 7:
    permit internet
Example 2. If you did issue the ip bgp community new-format command, the display appears as follows:
host1#show ip community-list
Community List 1:
    permit 1239:1005
    permit 1239:1006
    permit 1239:1004
Community List 2:
    deny 1239:1005
    permit 1239:1006
    permit 1239:1004
Community List 4:
    permit local-as
Community List 5:
    permit no-advertise
Community List 6:
    permit no-export
Community List 7:
    permit internet
show ip prefix-list

Use to display information about the prefix lists currently configured on the system.

Example
host1#show ip prefix-list
Prefix-list with the last deletion/insertion: def
ip prefix-list name abc: 4 entries
   seq 5 permit 192.168.0.0/16 le 24
   seq 10 permit 192.178.0.0/16 le 24
   seq 15 deny 195.178.0.0/16 le 24
   seq 20 deny 195.178.0.0/16 le 32
ip prefix-list name def: 1 entries
   seq 5 deny 192.170.0.0/16
Example
host1#show ip prefix-list summary
Total memory used for prefix-list: 310 bytes
Prefix-list with the last deletion/insertion: def
ip prefix-list name abc:
   count: 4, range entries: 4, sequences: 5-20
ip prefix-list name def:
   count: 1, range entries: 0, sequences: 5-5
show ip prefix-tree

Use to display information about the prefix trees currently configured on the system.

Example
host1#show ip prefix-tree
Prefix-tree with the last deletion/insertion: t_abc5
ip prefix-tree name t_abc1: 1 entries
   permit 108.243.0.0/16
ip prefix-tree name t_abc2: 3 entries
   permit 101.10.254.0/24
   permit 102.10.248.0/21
   permit 103.10.192.0/18
   permit 108.109.0.0/16
   permit 108.109.241.0/24
ip prefix-tree name t_abc3: 1 entries
   deny 108.0.0.0/8
Example
host1#show ip prefix-tree summary
Total memory used for prefix-tree: 860 bytes
Prefix-tree with the last deletion/insertion: t_abc5
ip prefix-tree name t_abc1:
   count: 1
ip prefix-tree name t_abc2:
   count: 5
ip prefix-tree name t_abc3:
   count: 1 
show ip protocols

Use to display detailed information about the protocols currently configured on the system.

Use the summary keyword to display only a list of the configured protocols.

For field descriptions, see the show commands for the individual routing protocols in their respective Configuration Guide chapters.

Example
host1#show ip protocols
Routing Protocol is "bgp 1"
  Default local preference is 100
  IGP synchronization is enabled
  Always compare MED is disabled
  Router flap damping is disabled
  Administrative Distance: external 20 internal 200 local 
200
  Neighbor(s):
    No neighbors are configured
  Routing for Networks:
Routing Protocol is "ospf 255" with Router ID 100.100.100.1
  Distance is 110
  Address Summarization:
    None
  Routing for Networks:
Routing Protocol is "rip"
  Router Administrative State: enable
  System version RIP1: send = 1, receive = 1 or 2
  Update interval: 30 seconds
  Invalid after: 180  seconds
  hold down time: 120 seconds
  flushed interval: 300 seconds
  Filter applied to outgoing route update is not set
  Filter applied to incoming route update is not set
  No global route map
  Distance is 120
  Interface         Tx   Rx   Auth
  Routing for Networks:
    10.2.1.0/255.255.255.0
show ip redistribute

Use to display configured route redistribution policy.

Field descriptions

To - protocol into which routes are distributed

From - protocol from which routes are distributed

status - redistribution status

route map number - number of the route map

Example
host1#show ip redistribute
To ospf, From static is enabled with route map 4
To ospf, From connected is enabled with route map 3
show ip route

Use to display the current state of the routing table, including routes not used for forwarding.

You can display all routes, a specific route, all routes beginning with a specified address, routes for a particular protocol (BGP, IS-IS, OSPF, or RIP), locally connected routes, internal control routes, static routes, or summary counters for the routing table.

Field descriptions

Prefix - IP address prefix

Length - prefix length

Type - protocol type

Next Hop - IP address of the next hop

Dist - distance metric for the route

Met - number of hops

Intf - interface type and interface specifier

Example 1
host1#show ip route
Protocol/Route type codes:
  I1- ISIS level 1, I2- ISIS level2,
  I- route type intra, IA- route type inter, E- route type external,
  i- metric type internal, e- metric type external,
  O- OSPF, E1- external type 1, E2- external type2,
  N1- NSSA external type1, N2- NSSA external type2
  Prefix/Length   Type    Next Hop       Dist/Met   Intf
  -------------   ----    --------       --------   ------
  172.16.2.0/24    Bgp     192.168.1.102   20/1       fastEthernet0/0
  10.10.0.112/32   Static  192.168.1.1     1/1        fastEthernet0/0
  10.1.1.0/24      Connect 10.1.1.1        0/1        atm3/0.100
Example 2
host1#show ip route static
Protocol/Route type codes:
  I1- ISIS level 1, I2- ISIS level2,
  I- route type intra, IA- route type inter, E- route type external,
  i- metric type internal, e- metric type external,
  O- OSPF, E1- external type 1, E2- external type2,
  N1- NSSA external type1, N2- NSSA external type2
  Prefix/Length    Type    Next Hop     Dist/Met  Intf
  -------------    ----    --------     --------  ------
  10.10.0.112/32   Static  192.168.1.1    1/1       fastEthernet0/0
Example 3
host1#show ip route summary
5 total routes, 720 bytes in route entries
0 isis routes
0 rip routes
1 static routes
1 connected routes
0 bgp routes
0 ospf routes
3 other internal routes
0 access routes
0 internally created access host routes
Last route added/deleted: 0.0.0.0/0 by StaticLow
At THU MAR 09 2000 05:22:49 UTC 
show ip route slot

Use to display the interface and next hop for an IP address in the routing table of a line module specified by the slot it occupies.

slotNumber - number of slot containing the line module for which the information is displayed

ipAddress - IP address to look up in the routing table

Field descriptions

IP address - address reachable via the interface

Interface - interface type and specifier associated with the IP address; displays "Local Interface" if a special interface index is present in the routing table for special IP addresses, such as broadcast addresses

Next Hop - next hop to reach the IP address; displays "---" if no next hop is associated with the IP address

Example 1
host1#show ip route slot 6 10.10.0.231
  IP address   Interface            Next Hop
------------   ----------------     ------------
10.10.0.231    fastEthernet 6/0     10.10.0.231
Example 2
host1#show ip route slot 9 90.248.1.2
IP address   Interface            Next Hop
------------   ----------------     ------------
90.248.1.2     serial9/23:2         ---
Example 3
host1#show ip route slot 9 90.249.255.255
IP address     Interface            Next Hop
------------   ----------------     ------------
90.249.255.255 Local Interface      ---
show ip static

Use to display the status of static routes in the routing table.

You can specify an optional IP mask that filters specific routes.

Field descriptions

Prefix - IP address prefix

Length - prefix length

Next Hop - IP address of the next hop

Met - number of hops

Dist - administrative distance or weight assigned to the route

Tag - tag value assigned to the route

Intf - interface type and interface specifier

Example
host1#show ip static
Prefix/Length   Next Hop:    Met: Dist:  Tag:  Intf:
10.2.0.0/24     192.168.1.1  1    1      0     ethernet6/0
10.2.1.0/24     192.168.1.1  1    1      1     ethernet6/0
172.31.1.48/32  172.18.2.2   1    1      0     atm5/1.1
show ip traffic

Use to display statistics about IP traffic.

Field descriptions

IP Statistics Rcvd:

Router Id - router ID number

total - number of frames received

local destination - frames with this router as their destinations

hdr errors - number of packets containing header errors

addr errors - number of packets containing addressing errors

unkn proto - number of packets received containing unknown protocols

discards - number of discarded packets

IP Statistics Frags:

reassembled - number of reassembled packets

reasm timed out - number of reassembled packets that timed out

reasm req - number of requests for reassembly

reasm fails - number of reassembly failures

frag ok - number of fragmented packets reassembled successfully

frag fail - number of fragmented packets reassembled unsuccessfully

frag creates - number of packets created by fragmentation

IP Statistics Sent:

forwarded - number of packets forwarded

generated - number of packets generated

out disc - number of outbound packets discarded

no routes - number of packets that could not be routed

routing discards - number of packets that could not be routed that were discarded

IP Statistics Route:

routes in table - number of routes in the routing table

timestamp req - number of requests for a timestamp

timestamp rpy - number of replies to timestamp requests

addr mask req - number of address mask requests

addr mask rpy - number of address mask replies

ICMP Statistics Rcvd:

total - total number of ICMP packets received

errors - number of error packets received

dst unreach - number of packets received with destination unreachable

time exceed - number of packets received with time-to-live exceeded

param probs - number of packets received with parameter errors

src quench - number of source quench packets received

redirects - number of receive packet redirects

echo req - number of echo request (PING) packets

echo rpy - number of echo replies received

timestamp req - number of requests for a timestamp

timestamp rpy - number of replies of timestamp requests

addr mask req - number of mask requests sent

addr mask rpy - number of mask replies sent

ICMP Statistics Sent:

total - total number of ICMP packets sent

errors - number of error packets sent

dest unreach - number of packets sent with destination unreachable

time excd - number of packets sent with time-to-live exceeded

param prob - number of packets sent with parameter errors

src quench - number of source quench packets sent

redirects - number of send packet redirects

echo req - number of echo request (PING) packets

echo rpy - number of echo replies received

timestamp req - number of requests for a timestamp

timestamp rpy - number of replies to timestamp requests

addr mask req - number of address mask requests

addr mask rpy - number of address mask replies

UDP Statistics Rcvd:

total - total number of UDP packets received

checksum - number of checksum error packets received

no port - number of packets received for which no application listener was listening on the destination port

UDP Statistics Sent:

total - total number of UDP packets sent

errors - number of error packets sent

TCP Global Statistics Connections:

attempted - number of outgoing TCP connections attempted

accepted - number of incoming TCP connections accepted

established - number of TCP connections established

dropped - number of TCP connections dropped

closed - number of TCP connections closed

TCP Global Statistics Rcvd:

total pkts - total number of TCP packets received

in-sequence pkts - number of packets received in sequence

bytes - number of bytes received

chksum err pkts - number of checksum error packets received

authentication err pkts - number of authentication error packets received

bad offset pkts - number of packets received with bad offsets

short pkts - number of short packets received

duplicate pkts - number of duplicate packets received

out of order pkts - number of packets received out of order

TCP Global Statistics Sent:

total pkts - total number of TCP packets sent

data pkts - number of data packets sent

bytes - number of bytes sent

retransmitted pkts - number of packets retransmitted

retransmitted bytes - number of retransmitted bytes

OSPF Statistics - not supported for this version of the system

IGMP Statistics - not supported for this version of the system

ARP Statistics - not supported for this version of the system

Example
host1#show ip traffic
IP statistics: Router Id: 172.31.192.217
  Rcvd:  97833 total, 171059 local destination
  0 hdr errors, 0 addr errors
         167 unkn proto, 0 discards
   Frags: 4 reassembled, 30 reasm timed out, 8 reasm req
         0 reasm fails, 145 frag ok, 0 frag fail
         290 frag creates
 Sent:  15 forwarded, 25144 generated, 0 out disc
         0 no routes,0 routing discards
  Route: 57680 routes in table
    0 timestamp req, 0 timestamp rpy
        0 addr mask req, 0 addr mask rpy
ICMP statistics:
  Rcvd: 561 total, 0 errors, 15 dst unreach
        0 time exceed, 0 param probs, 0 src quench
        0 redirects, 0 echo req, 0 echo rpy
        0 timestamp req, 0 timestamp rpy
        0 addr mask req, 0 addr mask rpy
  Sent: 0 total, 0 errors, 0 dest unreach
        0 time excd, 0 param prob, 0 src quench
        0 redirects, 0 echo req, 0 echo rpy
UDP Statistics:
  Rcvd: 93326 total, 0 checksum errors, 90610 no port
  Sent: 0 total, 0 errors
TCP Global Statistics:
  Connections: 7358 attempted, 4 accepted, 7362 established
        0 dropped, 14718 closed
  Rcvd: 75889 total pkts, 53591 in-sequence pkts, 3120283 
bytes
        0 chksum err pkts, 0 authentication err pkts, 0 bad 
offset
        0 short pkts, 0 duplicate pkts, 0 out of order pkts
  Sent: 82318 total pkts, 44381 data pkts, 656321 bytes
        34 retransmitted pkts, 487 retransmitted bytes
OSPF Statistics:
IGMP Statistics:
ARP Statistics:
show route-map

Use to display the configured route maps.

The displayed information includes the instances of each access list such as match and set commands.

Example
host1(config)#route-map 1 permit 10
host1(config-route-map)#match community 44
host1(config-route-map)#set local-pref 400
host1(config-route-map)#exit
host1(config)#exit
host1#show route-map 1
route-map 1, permit, sequence 10
  Match clauses:
    match community 44
  Set clauses:
    set local-pref 400

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