Reference Guide

240 | Border Gateway Protocol IPv4 (BGPv4)
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FTOS displays debug messages on the console. To view which debugging commands are enabled, use the
show debugging command in EXEC Privilege mode.
Use the keyword no followed by the debug command To disable a specific debug command. For example,
to disable debugging of BGP updates, enter
no debug ip bgp updates command.
Use
no debug ip bgp to disable all BGP debugging.
Use
undebug all to disable all debugging.
Storing Last and Bad PDUs
FTOS stores the last notification sent/received, and the last bad PDU received on per peer basis. The last
bad PDU is the one that causes a notification to be issued. These PDUs are shown in the output of the
command
show ip bgp neighbor, as shown in the example below.
FTOS(conf-router_bgp)#do show ip bgp neighbors 1.1.1.2
BGP neighbor is 1.1.1.2, remote AS 2, external link
BGP version 4, remote router ID 2.4.0.1
BGP state ESTABLISHED, in this state for 00:00:01
Last read 00:00:00, last write 00:00:01
Hold time is 90, keepalive interval is 30 seconds
Received 1404 messages, 0 in queue
3 opens, 1 notifications, 1394 updates
6 keepalives, 0 route refresh requests
Sent 48 messages, 0 in queue
3 opens, 2 notifications, 0 updates
43 keepalives, 0 route refresh requests
Minimum time between advertisement runs is 30 seconds
Minimum time before advertisements start is 0 seconds
debug ip bgp [ip-address | peer-group
peer-group-name] keepalive [in | out]
EXEC Privilege View information about BGP KEEPALIVE
messages.
debug ip bgp [ip-address | peer-group
peer-group-name] notifications [in | out]
EXEC Privilege View information about BGP notifications
received from or sent to neighbors.
debug ip bgp [ip-address | peer-group
peer-group-name] updates [in | out]
[prefix-list name]
EXEC Privilege View information about BGP updates and filter
by prefix name
debug ip bgp {ip-address |
peer-group-name} soft-reconfiguration
EXEC Privilege Enable soft-reconfiguration debug. Enable
soft-reconfiguration debug.
To enhance debugging of soft reconfig, use the
following command only when route-refresh is
not negotiated to avoid the peer from resending
messages:
bgp soft-reconfig-backup
In-BGP is shown via the show ip protocols
command.
Command Syntax Command Mode Purpose