subnet prefix length > 64 breaks IPv6?
Glen Kent
glen.kent at gmail.com
Sun Dec 25 10:18:00 UTC 2011
Hi Ray,
> prefixes on the same link. Choosing to make use of a 120-bit prefix
> (for example) will do nothing to protect against a rogue RA announcing
> its own 64-bit prefix with the A flag set.
>
I could not find any "A flag" in the RA. Am i missing something?
>From http://www.iana.org/assignments/icmpv6-parameters:
Registry:
RA Option Bit Description Reference
------------- --------------------------------------- ---------
0 M - Managed Address Configuration Flag [RFC2461]
1 O - Other Configuration Flag [RFC2461]
2 H - Mobile IPv6 Home Agent Flag [RFC3775]
3 Prf - Router Selection Preferences [RFC4191]
4 Prf - Router Selection Preferences [RFC4191]
5 P - Neighbor Discovery Proxy Flag [RFC4389]
6-53 R - Reserved; Available for assignment [RFC5175]
54-55 Private Experimentation [RFC5175]
Glen
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