Step 3: Diagnose BGP Session Establishment Problems

Action

To trace BGP session establishment problems, follow these steps:

1. In configuration mode, go to the following hierarchy level:

[edit]

user@host# edit protocol bgp

2. Configure BGP open messages:

[edit protocols bgp]

user@host# set traceoptions flag open detail 

3. Verify the configuration:

user@host# show

For example:

[edit protocols bgp]

user@host# show 

traceoptions {

    file bgplog size 10k files 10;

    flag open detail;

4. Commit the configuration:

user@host# commit

5. View the contents of the file containing the detailed messages:

user@host# run show log filename

For example:

[edit protocols bgp]

user@host# run show log bgplog 

Sep 17 17:13:14 trace_on: Tracing to "/var/log/bgplog" started

Sep 17 17:13:14 bgp_read_v4_update: done with 201.0.0.2 (Internal AS 
10458) received 19 octets 0 updates 0 routes

Sep 17 17:13:15 bgp_read_v4_update: receiving packet(s) from 201.0.0.3 
(Internal AS 10458)

Sep 17 17:13:15 bgp_read_v4_update: done with 201.0.0.3 (Internal AS 
10458) received 19 octets 0 updates 0 routes

Sep 17 17:13:44 bgp_read_v4_update: receiving packet(s) from 201.0.0.2 
(Internal AS 10458)

[...Output truncated...]