Display Detailed BGP Protocol Information
Action
To display BGP protocol information in detail, follow these steps:
- In configuration mode, go to the following hierarchy level:[edit]user@host# edit protocol bgp traceoptions
- Configure the flag to display
detailed BGP protocol messages:[edit protocols bgp traceoptions]user@host# set flag update detail
- Verify the configuration:user@host# show
For example:
[edit protocols bgp traceoptions]user@host# show flag update detail; - Commit the configuration:user@host# commit
- View the contents of the file containing the detailed
messages:user@host# run show log filename
For example:
[edit protocols bgp traceoptions]user@pro5-a# run show log bgp Sep 17 14:47:16 trace_on: Tracing to "/var/log/bgp" startedSep 17 14:47:17 bgp_read_v4_update: receiving packet(s) from 10.255.245.53 (Internal AS 10458)Sep 17 14:47:17 BGP RECV 10.255.245.53+179 -> 10.255.245.50+1141Sep 17 14:47:17 BGP RECV message type 2 (Update) length 128Sep 17 14:47:17 BGP RECV flags 0x40 code Origin(1): IGPSep 17 14:47:17 BGP RECV flags 0x40 code ASPath(2): 2Sep 17 14:47:17 BGP RECV flags 0x80 code MultiExitDisc(4): 0Sep 17 14:47:17 BGP RECV flags 0x40 code LocalPref(5): 100Sep 17 14:47:17 BGP RECV flags 0xc0 code Extended Communities(16): 2:10458:1[...Output truncated...]
Meaning
Table 1 lists tracing flags specific to BGP and presents example output for some of the flags. You can also configure tracing for a specific BGP peer or peer group. For more information, see the Junos System Basics Configuration Guide.
Table 1: BGP Protocol Tracing Flags
Tracing Flags | Description | Example Output |
|---|---|---|
aspath | AS path regular expression operations | Not available. |
damping | Damping operations | Nov 28 17:01:12 bgp_damp_change: Change event |
keepalive | BGP keepalive messages | Nov 28 17:09:27 bgp_send: sending 19 bytes to 10.217.5.101 (External AS 65471) |
open | BGP open packets | Nov 28 18:37:42 bgp_send: sending 37 bytes to 10.217.5.101 (External AS 65471) |
packets | All BGP protocol packets | Sep 27 17:45:31 BGP RECV 10.0.100.108+179 -> 10.0.100.105+1033 |
update | Update packets | Nov 28 19:05:24 BGP SEND 10.217.5.1+179 -> 10.217.5.101+55813 |
