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Prefix Delegation

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Level 1
1 of 4

I am attmpting to setup my router behind a SwissCom internet box plus and I can see that I get an IPv6 address but the router does not appear to support Prefix delegation when this is requested by a client device. I  should be able to partition my address space as I wish (and can do with our limitiation in the UK)

 

I need to get this to work in order to enable some VPN functionality. 

 

Has anyone had any success with this?

 

3 Comments
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Level 1
2 of 4

I have now found a paper describing the missing functionality:

https://tools.ietf.org/html/draft-wbeebee-ipv6-cpe-router-04#page-12

(Cascading of Routers behind the CPE Router)

 

 

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Level 2
3 of 4

I've been trying to get this to work myself.  As far as I've been able to understand, Swisscom gives us a /60.  This should provide 16 /64 but actually only the first one is valid... and the Swisscom router takes it.  It probably prevents DHCPv6 from getting to your router because the only available prefix (the /64) is already assigned on the Swisscom router.

 

As far as I've been able to figure out, our options currently are to turn the router into a transparent bridge/firewall or remove the Swisscom box out of the picture completely.

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Level 2
Level 2
4 of 4

currently not supported.  I started a similar threat in 2017.

https://community.swisscom.ch/t5/Router-Hardware/Native-IPv6/td-p/496615

 

Implementation was promised til end of 2019 but it did not happen yet.

 

 

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