IPv6 Lo. for 6PE/6VPE

Fri Jun 15 11:39:05 UTC 2012

Thanks all,

That's sound more logic to me, so we  assign IPv6 for lo0 on every hop, so
it can understand ICMP control packet.

But who would use these packets? If I'm at my 6PE then i ping using Lo0
IPv4 address because we are not enabling IPV6 Routing/Dual stack so it can
carry IPv6 addresses across my backbone.

I mean to use IPv6 on loopbacks then i need to advertise them on some
routing protocol BGP/OPSF but actually we are not enabling these protocols
in the Core. An i correct in my logic?

BR,
Mohamed

On Fri, Jun 15, 2012 at 1:29 PM, adam vitkovsky <adam.vitkovsky at swan.sk>wrote:

> Right the ::FFFF::<ipv4-addr> sounds familiar
> I guess there was also an option that the P router would just label switch
> the packet towards the exit PE and the PE would than originate the ICMP
> back
> to source
> Or you can turn off TTL propagation across the core -so the ICMP could only
> time out at the PEs
>
> adam
> -----Original Message-----
> From: Nagendra Kumar (naikumar) [mailto:naikumar at cisco.com]
> Sent: Friday, June 15, 2012 12:52 PM
> To: Daniel Roesen; nanog at nanog.org
> Subject: RE: IPv6 Lo. for 6PE/6VPE
>
> 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
>
>
>
>
>

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