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:d...@cluenet.de] > Sent: Friday, June 15, 2012 4:02 PM > To: nanog@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: d...@cluenet.de -- dr@IRCnet -- PGP: 0xA85C8AA0 >
