[Babel-users] Neighbour and router id

Gabriel Kerneis kerneis at pps.jussieu.fr
Mon Aug 1 07:58:00 UTC 2011


Hi,

while trying to come up with a bug-free release of Bab el-Web, I got confused
(again!) about routers and interfaces.

I try to associate a neighbour address (fe80::whatever) to a router id.
1) Does that make sense? (ie. is it an injection?)  If it doesn't, then why
   not?
2) Assuming it makes sense, I thought a reliable way to recover the injection
   was looking at routes with refmetric = 0: the "via" field would give me the
   interface, it is a neighbour since refmetric = 0 (is that correct?), and
   announced by router "id".

I am obviously wrong somewhere since I got the following routes (refmetric = 0,
same "via", different "id"):

prefix  met.  refm. id                      via                        if     installed
foo/128 96    0     02:18:f3:ff:fe:a9:91:4e fe80::3cc9:fe4d:23a5:9b07  alpha  yes
bar/32  96    0     02:18:f3:ff:fe:98:e5:34 fe80::3cc9:fe4d:23a5:9b07  alpha  no


I'd like to understand, and finally find a way to plot the whole thing in some
remotely-correct manner.

Best,
-- 
Gabriel



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