Re: using "reserved" IPv6 space

[Karl Auer <kauer () biplane com au>]

On Tue, 2012-07-17 at 00:10 -0500, Jimmy Hess wrote:
> Just to reaffirm that.    Rfc 4291  states packets sent to the
> subnet-router anycast will be delivered to one router on the subnet.
> [...]
> But what about packets with a destination address on another network
> and trying to use the anycast address as a 'gateway'?   The
> destination IP in the IP packet header of the forwarded packet won't
> be the anycast address;  the last known hardware address for the IP,
> if it's unicast,  may be down,   so it's probably nonsensical to enter
> an anycast address as default gateway,  unless  using the subnet
> anycast address as a router/gateway  has special behavior defined
> elsewhere?

I'm not sure I follow the logic there. If the anycast router changes the
packet will be resent to the new subnet anycast router eventually
(assuming some layer cares enough about the packet to resend it). The
"last known hardware address" doesn't matter any more or less in this
scenario than it does in any other routing situation.

Regards, K.
 
-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Karl Auer (kauer () biplane com au)
http://www.biplane.com.au/kauer

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