Re: IPv6 Lo. for 6PE/6VPE

[Robert McKay <robert () mckay com>]

You mean like this? ;)

 1. ???
 2. ldn-ipv6-b1.ipv6.telia.net                                          
 0.0%     3    1.0   1.2   1.0   1.4   0.2
 3. cogent-ic-125507-ldn-b5.c.telia.net                                 
 0.0%     2   40.6  40.4  40.2  40.6   0.3
 4. ::ffff:154.54.57.102                                                
 0.0%     2  129.1 129.1 129.1 129.1   0.0
 5. ::ffff:154.54.30.129                                                
 0.0%     2  120.2 120.0 119.8 120.2   0.3
 6. 2001:550::100                                                       
 0.0%     2  120.2 120.3 120.2 120.5   0.2
 7. ::ffff:154.54.5.253                                                 
 0.0%     2  120.5 120.3 120.1 120.5   0.3
 8. ???
 9. cogentco.com                                                        
 0.0%     2  119.9 119.9 119.9 119.9   0.0

Rob

On Fri, 15 Jun 2012 04:35:51 -0700, Owen DeLong wrote:
> 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 () 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: dr () cluenet de -- dr@IRCnet -- PGP: 0xA85C8AA0