IPv6 Routing / Subnetting
- by nappo
Recently I have installed Citrix Xen Server 6.2 on a machine. My Provider (Hetzner) gave me the IPv6 Subnet 2a01:4f8:200:xxxx::/64.
Followed an article in the providers wiki (1) i got it working and can assign IPs to my guests (CentOS). However i can't assign a second IP to a single guest - it will result in a timeout. I'm not very familiar with IPv6 routing / subnetting - any help or tips for further troubleshooting is welcome!
My Setup:
XenServer 6.2
IPv6: 2a01:4f8:200:xxxx::2/112
ip -6 route:
2a01:4f8:200:xxxx::/112 dev xenbr0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 0
fe80::1 dev xenbr0 metric 1024 mtu 1500 advmss 1440 hoplimit 0
default via fe80::1 dev xenbr0 metric 1024 mtu 1500 advmss 1440 hoplimit 0
Guest 1
IPv6: 2a01:4f8:200:xxxx::3/64
IPv6: 2a01:4f8:200:xxxx::4/64
ip -6 route:
2a01:4f8:200:xxxx::/64 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 4294967295
fe80::/64 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 4294967295
default via fe80::1 dev eth0 metric 1 mtu 1500 advmss 1440 hoplimit 4294967295
Guest 2
IPv6: 2a01:4f8:200:xxxx::5/64
Guest 1 IPv6 is working fine, Guest 2 too.
As suggested by the wiki article (1) i split my /64 network into a /112. Is it right to set the host /112 and the guests /64? Why is that?
