Hi,

I’m successfully using BIRD with the Go Looking Glass from https://github.com/xddxdd/bird-lg-go.  I haven’t needed to use the birdc CLI until now, and I’m a bit confused by it in ways the docs don’t appear to address.

(I’m running default distro pkgs on Alma Linux 8.5, one of the post-CentOS RHEL rebuilds.)

 

The output I get looks like:

[root@lg2 ~]# birdc show route | head

BIRD 2.0.9 ready.

Table master4:

223.94.242.0/23      unreachable [uwpg_rtr1_v4 2022-03-26 from 216.73.71.131] * (100) [AS56041?]

                     unreachable [umrtr2_v4 2022-03-26 from 206.211.216.52] (100) [AS56041?]

                     unreachable [umrtr1_v4 2022-03-26 from 206.211.216.51] (100) [AS56041?]

181.123.200.0/22     unreachable [umrtr1_v4 2022-03-26 from 206.211.216.51] * (100) [AS23201i]

                     unreachable [umrtr2_v4 2022-03-26 from 206.211.216.52] (100) [AS23201i]

                     unreachable [uwpg_rtr1_v4 2022-03-26 from 216.73.71.131] (100) [AS23201i]

88.218.186.0/24      unreachable [umrtr1_v4 2022-03-26 from 206.211.216.51] * (100) [AS62240i]

                     unreachable [umrtr2_v4 2022-03-26 from 206.211.216.52] (100) [AS62240i]

 

  1. Is the “unreachable” bit normal on a looking glass / route collector?
  2. What’s with the “?” at the end of some ASes?
  3. Where’s the AS paths?  All I seem to get is the terminal AS.

 

I’m not sure if I’m not using the tool correctly, or if I’m even using the right tool in the first place.

 

Pointers / clues appreciated?

 

Thanks,

-Adam

 

Adam Thompson
Consultant, Infrastructure Services
MERLIN
100 - 135 Innovation Drive
Winnipeg, MB, R3T 6A8
(204) 977-6824 or 1-800-430-6404 (MB only)
athompson@merlin.mb.ca
www.merlin.mb.ca