[154956] in North American Network Operators' Group
Re: using "reserved" IPv6 space
daemon@ATHENA.MIT.EDU (Oliver)
Tue Jul 17 12:50:37 2012
From: Oliver <olipro@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>
To: nanog@nanog.org
Date: Tue, 17 Jul 2012 18:49:16 +0200
In-Reply-To: <CFE82C57-EFE8-4EA2-AAD6-4DE30FDF0F14@delong.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Monday 16 July 2012 21:11:18 you wrote:
> The disadvantage to this is the high probability of packet duplication. For
> someone worried about ICMP spam on the subnet, I'm surprised you're not
> worried about what happens when 2 or more routers copy the same packet
> and route both copies on to the end destination. (Lather, rinse, repeat said
> duplication for any upstream segments using such tactics as well).
>
No.
The all-routers anycast address is resolved and creates a single Layer 2
neighbor entry - it may change, but there's no packet duplication issue here
because routing of an individual packet will only ever go to a single host at
L2, There is a difference between Multicast and Anycast.
Regards,
Oliver
