IPv6 Lo. for 6PE/6VPE

Fri Jun 15 11:35:51 UTC 2012

If it does, that's bad... You should never see IPv4 mapped addresses on the wire.
They should only be an internal representation of an IPv4 packet within the host.

Owen

On Jun 15, 2012, at 3:52 AM, Nagendra Kumar (naikumar) wrote:

> Hi,
> 
> Per my understanding, it is not required to have ipv6 address in loopback intf on all P routers inorder to have 6PE work. If I remember it correctly, P router will use ::FFFF::<ipv4-addr> while originating ICMPv6 error message.
> 
> -Nagendra
> 
> -----Original Message-----
> From: Daniel Roesen [mailto:dr at cluenet.de] 
> Sent: Friday, June 15, 2012 4:02 PM
> To: nanog at nanog.org
> Subject: Re: IPv6 Lo. for 6PE/6VPE
> 
> On Fri, Jun 15, 2012 at 11:56:05AM +0200, mohamed Osama Saad Abo sree wrote:
>> I was just wondering , while I'm planning my network to support 
>> 6PE/6VPE why should i assign an IPv6 for Loopbacks?
>> 
>> Maybe it's needed for Point-Point links or external interfaces between 
>> my peers, but anyone here know why i should assign IPv6 for all my 
>> Routers inside my ISP if we will run PE/6VPE not dual stack.
> 
> Otherwise the intermediate P devices do not have an address to source
> ICMPv6 "hop count exceeded" error replies => traceroute doesn't work properly.
> 
> Best regards,
> Daniel
> 
> --
> CLUE-RIPE -- Jabber: dr at cluenet.de -- dr at IRCnet -- PGP: 0xA85C8AA0
> 