■ 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
Monitoring BGP ■ 177
Chapter 1: Configuring BGP Routing
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