> And on A:
> A/128 metric 0 (exported)
> B/128 metric 65535 refmetric 0 id 02:a0:24:ff:fe:cf:7c:47 seqno 51665  
> age 72 via tun0 neigh fe80::8c7:3280:8ae3:6882 (installed)

metric 65535 has the special meaning "unreachable" which in the case of
wired interfaces means that two consecutive hellos were missed.

This seems like a problem in link sensing - either in babel or (more
likely) in your setup. Since it is a link sensing problem you should
be able to reproduce it with to nodes only. Can you confirm this?

To find out more: Try to get some debug output from babel to see
when hellos/ihus are sent/received. Once you have this info it should
be pretty obvious what's wrong.

In case it is just package loss on the tunnel: Setup babel.conf to
force an ETX metric on the tunnel interface.

Harald

Harald

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