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Re: IPv6 router is not forwarding packets




Le 06/01/2019 à 19:59, Rainer Dorsch a écrit :
Am Sonntag, 6. Januar 2019, 19:32:46 CET schrieb Ulf Volmer:

I'm confused that you have uplink and downlink addresses configured on
the client. Anyway, can you also post 'ip -6 r' from the client?

I have not explicitly configured the addresses, but I have a dnsmasq running on
the server which might be responsible for that, though I do not see how, I
have in dnsmasq.conf
(...)
rd@mohot:~$ ip -6 r
2a02:8070:898f:e400::/64 dev eth0 proto kernel metric 256 pref medium
2a02:8070:898f:e4f8::/64 dev eth0 proto kernel metric 256 pref medium
2a02:8070:898f:e4f8::/62 dev eth0 proto kernel metric 256 pref medium
fe80::/64 dev eth0 proto kernel metric 256 pref medium
default via fe80::d263:b4ff:fe00:325c dev eth0 proto ra metric 1024 hoplimit 64
pref medium
default via fe80::e228:6dff:fe43:5776 dev eth0 proto ra metric 1024 hoplimit
255 pref medium
rd@mohot:~$

I do not understand why there is fe80::e228:6dff:fe43:5776. This is the link
local address of the ISP router, which does not make sense (?).

Either dnsmasq is doing something nasty, or something else is leaking RA's from upstream to downstream. Could it be your VLAN setup ?

but even if I delete entry, I do not get it working:

You need at least to delete the bogus upstream address too.

You should start with a fully static setup on the host, fix routing, and when done you can try to setup SLAAC/DHCPv6.