On Wed, Mar 30, 2022 at 5:14 PM Adam Thompson <athomp...@merlin.mb.ca> wrote:
> 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? > > It depends on your setup. It could affect best path selection if there are "reachable" routes, so be careful with that. > > 1. What’s with the “?” at the end of some ASes? > > This displays one of BGP attributes. It is not the bird's thing, it is usual BGP thing. Description from bird's documentation: enum bgp_origin Origin of the route: either ORIGIN_IGP if the route has originated in an interior routing protocol or ORIGIN_EGP if it's been imported from the EGP protocol (nowadays it seems to be obsolete) or ORIGIN_INCOMPLETE if the origin is unknown. https://bird.network.cz/?get_doc&v=20&f=bird-6.html#rta-bgp-origin > > 1. Where’s the AS paths? All I seem to get is the terminal AS. > > Use "all" switch for "show route" command to see all attributes. https://bird.network.cz/?get_doc&v=20&f=bird-4.html#cli-show-route > > > 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 > [image: MERLIN] > 100 - 135 Innovation Drive > Winnipeg, MB, R3T 6A8 > (204) 977-6824 or 1-800-430-6404 (MB only) > athomp...@merlin.mb.ca > www.merlin.mb.ca > > >
