IPv6 Lo. for 6PE/6VPE

Fri Jun 15 13:07:15 UTC 2012

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 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
>>