[Xen-users] Re: trouble with xen and ipv6

["Andrew Yates" <andrewyates@xxxxxxxxx>]

Removing the ipv6 routes from peth0 and xenbr0 seem to fix the problem.
I used the following commands:
ip -6 route del 2001:5c0:911e::/64 dev xenbr0
ip -6 route del 2001:5c0:911e::/64 dev peth0

I'm not sure why they are given routes in the first place. I'll
disable autoconfiguration on those devices to see if that fixes it. If
anyone has any suggestions, let me know.

On 7/27/06, Andrew Yates <andrewyates@xxxxxxxxx> wrote:
> I have a computer on my lan running radvd, advertising an ipv6 /64.
> All my computers receive the advertisements and automatically
> configure their IP address.
> The problem is that my Xen server can't ping or connect to any (with
> ping6, of course) other ipv6 addresses. It is able to ping and connect
> to ipv4 addresses. It can ping it's own ipv6 address, but not any of
> the other ipv6 addresses on the lan. Other computers can ping the Xen
> server via ipv6. I've tried making iptables accept everything, but it
> still doesnt work.
>
> I am fairly certain that the problem definitely has to do with xen and
> the interfaces that it creates. Does anyone have any idea how to fix
> it? I'm really not sure where to begin, so any thoughts or pointers
> would be appreciated.
>
> For reference, here's the output of "ip -6 route" from a lan computer
> where ipv6 is working fine:
> fe80::/64 dev eth0  metric 256  expires 21279594sec mtu 1280 advmss
> 1220 metric 10 4294967295
> ff00::/8 dev eth0  metric 256  expires 21279594sec mtu 1280 advmss
> 1220 metric 10 4294967295
> default via fe80::2e0:4cff:feaa:4eef dev eth0  proto kernel  metric
> 1024  expires 1657sec mtu 1280 advmss 1220 metric 10 64
> unreachable default dev lo  proto none  metric -1  error -101 advmss
> 1220 metric 10 255
>
> And here's the output of "ip -6 route" from my xen server:
> 2001:5c0:911e::/64 dev peth0  proto kernel  metric 256  expires
> 21355494sec mtu 1280 advmss 1220 metric 10 4294967295
> 2001:5c0:911e::/64 dev xenbr0  proto kernel  metric 256  expires
> 21474726sec mtu 1280 advmss 1220 metric 10 4294967295
> 2001:5c0:911e::/64 dev eth0  proto kernel  metric 256  expires
> 21474726sec mtu 1280 advmss 1220 metric 10 4294967295
> fe80::/64 dev xenbr0  metric 256  expires -119341sec mtu 1280 advmss
> 1220 metric 10 4294967295
> fe80::/64 dev vif0.0  metric 256  expires -119341sec mtu 1500 advmss
> 1220 metric 10 4294967295
> fe80::/64 dev peth0  metric 256  expires -119341sec mtu 1280 advmss
> 1220 metric 10 4294967295
> fe80::/64 dev vif4.0  metric 256  expires -118883sec mtu 1500 advmss
> 1220 metric 10 4294967295
> fe80::/64 dev eth0  metric 256  expires -790sec mtu 1280 advmss 1220
> metric 10 4294967295
> ff00::/8 dev xenbr0  metric 256  expires -119341sec mtu 1280 advmss
> 1220 metric 10 4294967295
> ff00::/8 dev vif0.0  metric 256  expires -119341sec mtu 1500 advmss
> 1220 metric 10 4294967295
> ff00::/8 dev peth0  metric 256  expires -119341sec mtu 1280 advmss
> 1220 metric 10 4294967295
> ff00::/8 dev vif4.0  metric 256  expires -118883sec mtu 1500 advmss
> 1220 metric 10 4294967295
> ff00::/8 dev eth0  metric 256  expires -790sec mtu 1280 advmss 1220
> metric 10 4294967295
> default via fe80::2e0:4cff:feaa:4eef dev xenbr0  proto kernel  metric
> 1024  expires 1690sec mtu 1280 advmss 1220 metric 10 64
> default via fe80::2e0:4cff:feaa:4eef dev eth0  proto kernel  metric
> 1024  expires 1690sec mtu 1280 advmss 1220 metric 10 64
> unreachable default dev lo  proto none  metric -1  error -101 advmss
> 1220 metric 10 255
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