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Chapter 8
Configuring Basic BGP
filter-list Display routes conforming to the
flap-statistics Display flap statistics of routes
inconsistent-as Display only routes with inconsistent
origin ASes
neighbors Detailed information on TCP and BGP
neighbor connections
paths Path information
peer-group Display information on peer-groups
regexp Display routes matching the AS path
regular expression
summary Summary of BGP neighbor status
Notice in the output below that no connections are established, as
indicated by the bottom line. This means that the peer has not synchronized.
If the number of connections established keeps incrementing, there could be
a problem with the link between the two neighbors. This output is from IOS
version 12.0(5):
2514#show ip bgp neighbors
BGP neighbor is, remote AS 63001, external link
Index 1, Offset 0, Mask 0x2
BGP version 4, remote router ID
BGP state = Idle, table version = 0
Last read 00:00:07, hold time is 180, keepalive interval
is 60 seconds
Minimum time between advertisement runs is 30 seconds
Received 0 messages, 0 notifications, 0 in queue
Sent 0 messages, 0 notifications, 0 in queue
Prefix advertised 0, suppressed 0, withdrawn 0
Connections established 0; dropped 0
Last reset never
0 accepted prefixes consume 0 bytes
0 history paths consume 0 bytes
External BGP neighbor not directly connected.
No active TCP connection
Copyright ©2001 SYBEX , Inc., Alameda, CA