Ole, > > I try to ping some routers on one of their > Subnet-Router anycast addresses (SRAA). > > (http://tools.ietf.org/html/rfc4291#section-2.6.1) > > > > Some (Cisco) reply with an unicast source address > (same subnet prefix). > > Another one (Alcatel) reply with the SRAA as source > address. > > A Linux kernel in IPv6 forwarding mode behave like the > Cisco router. > > > > The RFC 4291 removed the restrictions on using IPv6 > anycast addresses, so a SRAA may be used as a source > address. > > > > Is there an RFC which describe the reply source > address that must be used ? > > not as far as I know. the closest we have is probably > http://tools.ietf.org/html/draft-itojun-ipv6-anycast-analysis-02
Thanks for the link. This draft refers RFC 2373 that prohibited the use of anycast as source address. It's no more the case in RFC 4291. > 6rd is one of the few applications using the Subnet router > anycast. we thought it useful for troubleshooting and then > particularly as a way to identify BR if the reply was the > BR's unicast address instead of the anycast. your mileage > may vary. If the source address of reply differs from destination address of the request, some applications are broken. Thanks, François-Xavier -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
