Hi Marc,
On 22.02.2016 16:04, Marc Haber wrote:
In prose:
The host is a host for KVM VMs. It receives IPv6 connectivity via RA
on eth0, where the default gateway announces its address as fe80::1.
It also provides IPv6 connectivity to the VMs via the br0 interface.
It is running radvd on br0, and for statically configured VMs it has
also fe80::1 on br0.
If accept_ra_from_local on eth0 were 0, the system would not accept
the RA from the default gateway and and up with no IPv6 since fe80::1
is locally configured with br0.
Isn't this behavior fixed with
commit c1a9a291cee0890eb0f435243f3fb84fefb04348
Author: Hannes Frederic Sowa <han...@stressinduktion.org>
Date: Wed Dec 23 22:44:37 2015 +0100
ipv6: honor ifindex in case we receive ll addresses in router
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$ git describe --contains c1a9a291cee0890eb0f435243f3fb84fefb04348
v4.4-rc8~5^2~10
?
If you don't have fe80::1%br0 bound on exactly that interface, it should
work, no? So, no need for accept_ra_from_local, which has dubious
semantics anyway.
If accept_ra_from_local on eth0 is 1, the system accepts both the RA
from the default gateway on eth0 _AND_ its own RA sent out and
received on br0, and, making things worse, is setting the IP address
and default route not on br0, but on eth0.
Understood. Thanks, I was just able to easily reproduce it. Was already
wondering why someone would enable accept_ra_from_local besides only
testing. I check it out, thanks!
Thanks,
Hannes
