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[Xen-users] trouble with xen and ipv6


  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: "Andrew Yates" <andrewyates@xxxxxxxxx>
  • Date: Thu, 27 Jul 2006 09:50:25 -0400
  • Delivery-date: Thu, 27 Jul 2006 06:51:18 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

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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