To enable debug tracing of BGP events, use the debug ip bgp command in privileged EXEC mode. Debug messages are sent to the system log at the DEBUG severity level. To print them on the console, enable console logging at the DEBUG level (logging console debug command); see logging console.
The debug options enabled for a specific peer are the union of the options enabled globally and the options enabled specifically for the peer.
Enabling one of the packet type options enables packet tracing in both the inbound and outbound directions.
| Default | No debug tracing is enabled by default. |
| Format | debug ip bgp [ peer-address | events | keepalives | notification | open | refresh | updates ] |
| Mode | Privileged EXEC |
| Parameter | Description |
|---|---|
| peer-address | (Optional) The IPv4 or IPv6 address of a BGP peer. Debug traces are enabled for a specific peer when this option is specified. The command can be issued multiple times to enable simultaneous tracing for multiple peers. |
| events | (Optional) Trace adjacency state events. |
| keepalives | (Optional) Trace transmit and receive of KEEPALIVE packets. |
| notification | (Optional) Trace transmit and receive of NOTIFICATION packets. |
| open | (Optional) Trace transmit and receive of OPEN packets. |
| refresh | (Optional) Traces transmit and receive of ROUTE REFRESH packets. |
| updates | (Optional) Traces transmit and receive of UPDATE packets. |
