On Mon, 2012-07-16 at 23:36 -0700, Owen DeLong wrote: > Reread the spec... [the subnet router anycast address] gets the packet > to one or more of the routers and it may well lead to packet > duplication. There may or may not be coordination between the > routers. It isn't in the spec.
Which spec? Looking at RFC 4291, Section 2.6.1: Packets sent to the Subnet-Router anycast address will be delivered to one router on the subnet. All routers are required to support the Subnet-Router anycast addresses for the subnets to which they have interfaces. The Subnet-Router anycast address is intended to be used for applications where a node needs to communicate with any one of the set of routers. But I do not have an encylopaedic knowledge of all the RFCs, so perhaps this has been superseded, obsoleted or updated... Reading it with a squint: The phrase "packets [...] will be delivered to one router on the subnet" does not specifically exclude the possibility that packets will be delivered to more than one router on the subnet. Still, I do think it would be a little unreasonable to interpret it thus. Regards, K. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (ka...@biplane.com.au) http://www.biplane.com.au/kauer GPG fingerprint: AE1D 4868 6420 AD9A A698 5251 1699 7B78 4EEE 6017 Old fingerprint: DA41 51B1 1481 16E1 F7E2 B2E9 3007 14ED 5736 F687
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