> So are you _really_ sure you want to drop RH0 from the IPv6 protocol > spec, given that the practicalities of a general use 'replacement' > header is going to present some fascinating transition issues?
I suspect code changes are necessary in any case, completely independent of whether RH0 or RHx is going to be employed or what the IETF does. First, given the possibility for amplification, implementations would be well advised to at least add some checks and limits on RH0, even if it would not be deprecated. Second, a number of implementations already have turned the feature off, which obviously means that we cannot expect a random node in the Internet to always respect anyone's request to perform a RH0 operation. But, at the end of the day, I'm not sure the above is a big problem. Please remember that RH works in an end-to-end fashion; only the source and current destination of the packet needs to process it. Not routers in between. There have been examples where new RH types have been specified, implemented, and used. In Mobile IPv6, for instance, RH2 is implemented by the participants. This is easy, as only the participants need to implement it, and RH2 is a MUST-to-implement in the specifications for any of the participant nodes in Mobile IPv6. More generally, if one wants to provide a new feature based on routing header, what we need is - Implementation in nodes that want to use RHx for something. This should be easy. - Implementation in other, consenting nodes that appear in a non-final destination of the routing header. This is not needed in all cases, e.g., not in the Mobile Ipv6 case. The second item is harder, but I'm not sure its an unreasonable requirement. After all, as a manager of a network you probably want to be in control of where re-forwarding to a new address is used. And you probably are in control of that, already... Jari -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
