• View information about local BGP state changes and other BGP events.
EXEC Privilege mode
debug ip bgp [ip-address | peer-group peer-group-name] events [in | out]
• View information about BGP KEEPALIVE messages.
EXEC Privilege mode
debug ip bgp [ip-address | peer-group peer-group-name] keepalive [in | out]
• View information about BGP notifications received from or sent to neighbors.
EXEC Privilege mode
debug ip bgp [ip-address | peer-group peer-group-name] notifications [in |
out]
• View information about BGP updates and filter by prefix name.
EXEC Privilege mode
debug ip bgp [ip-address | peer-group peer-group-name] updates [in | out]
[prefix-list name]
• Enable soft-reconfiguration debug.
EXEC Privilege mode
debug ip bgp {ip-address | peer-group-name} soft-reconfiguration
In-BGP is shown using the show ip protocols command.
The system displays debug messages on the console. To view which debugging commands are enabled,
use the show debugging command in EXEC Privilege mode.
To disable a specific debug command, use the keyword no then the debug command. For example, to
disable debugging of BGP updates, use no debug ip bgp updates command.
To disable all BGP debugging, use the no debug ip bgp command.
To disable all debugging, use the undebug all command.
Storing Last and Bad PDUs
The system stores the last notification sent/received and the last bad protocol data unit (PDU) received
on a per peer basis. The last bad PDU is the one that causes a notification to be issued.
In the following example, the last seven lines shown in bold are the last PDUs.
Example of the show ip bgp neighbor Command to View Last and Bad PDUs
Dell(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
Border Gateway Protocol IPv4 (BGPv4) 229