Assign /112 IPv6 range to OpenVZ VPS

Question

I have a /48 IPv6 and would like to chop these up into /112's that I can assign to my VPSes. I know how to assign them manually, e.g.

vzctl set 1 --ipadd ipv6IP --save

But how could I assign, for example, a full /112 at once?

You want to assign "a full /112 at once" to what? – Steven Monday Jan 28 '11 at 15:58 — Steven Monday, Jan 28 '11 at 15:58

score 4 · Accepted Answer · answered Jan 28 '11 at 05:54

4

Use veth. In VE:

/sbin/ip -6 addr add IPv6_ADDR/112 dev eth0

answered Jan 28 '11 at 05:54

alvosu

In the virtual machine?? – Daniel Jan 28 '11 at 06:15
Yes, in the virtual machine. – alvosu Jan 29 '11 at 15:55
I don't want to be able to assign them in the VE i want to assign them from the host node. E.G. if i sold some vpses i don't want just anyone to take their own amount of ipv6 – Daniel Jan 31 '11 at 07:10

earl · Answer 2 · 2011-02-03T03:38:33.533

That takes several steps:

In the CT0 (the "host"), add a veth to the VE (the "VM"):
```
vzctl set <CTID> --netif_add eth0
```
In the CT0, enable IPv6 forwarding (net.ipv6.conf.all.forwarding=1 will do that, temporarily. Consult the docs of your OS for how to make that permanent.)
In the CT0, add a route for the /112 to the VE's virtual interface. For example, assuming your VE has a CTID 1:
```
ip -6 route add IP6_NET/112 dev veth1.0
```
This concludes the setup in the CF0.
Now, finally, in your VE add addresses you want to use (from the subnet) to the VE's eth0:
```
ip -6 addr add IP6_IP dev eth0
```

2 Answers2