Monitoring Dampened BGP Routes of Specified Neighbors

Purpose

Display information about routes with a dampening history for the specified BGP neighbor. Report whether the indirect next hop of a route is unreachable; if not, display the IGP cost to the indirect next hop.

The show ip bgp neighbors dampened-routes and show bgp ipv6 neighbors dampened-routes commands display similar information.

Action

To display information about routes with a dampening history for the specified BGP neighbor:

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

Meaning

Table 36 lists the show ip bgp neighbors dampened-routes command output fields.

Table 36: show ip bgp neighbors dampened-routes Output Fields

Field Name	Field Description
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 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.
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	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

Monitoring Dampened BGP Routes of Specified Neighbors

Purpose

Action

Meaning

Related Documentation