using "reserved" IPv6 space
Karl Auer
kauer at biplane.com.au
Tue Jul 17 07:15:00 UTC 2012
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this has been superseded, obsoleted or updated...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.
--
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Karl Auer (kauer at biplane.com.au)
http://www.biplane.com.au/kauer
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