Re: IPV6 addressing and ICMP

That was a good one.

On Sun, Dec 13, 2009 at 1:20 PM, Bryan Bartik <bbartik_at_ipexpert.com> wrote:
> LOL. We have all been there :)
>
> On Sun, Dec 13, 2009 at 11:15 AM, Bryan Stair <uptown.ccie_at_gmail.com> wrote:
>
>> Bryan,
>>
>> Thanks....GENIUS BOY did not have the switch turned on. Tired from too much
>> studying. I knew it was something simple
>>
>> Thanks
>>
>>
>> On Sun, Dec 13, 2009 at 12:59 PM, Bryan Bartik <bbartik_at_ipexpert.com>wrote:
>>
>>> Bryan,
>>>
>>> Is there a switch in between? Have you done something to perhaps block
>>> IPv6? Encapsulation failed usually means there is no L3/L2 resolution. IPv6
>>> requires Neighbor Discovery protocol for this (which is part of ICMPv6). Try
>>> "debug ipv6 nd" - do you see anything?
>>>
>>>
>>> On Sun, Dec 13, 2009 at 10:49 AM, Bryan Stair <uptown.ccie_at_gmail.com>wrote:
>>>
>>>> To All,
>>>>
>>>> I have a simple IPv6 problem with two ethernet interfaces that I am
>>>> unable
>>>> to ping one another. I setup two /64 address to two directly ethernet
>>>> interfaces and when I attempt to ping will not work and I am not sure
>>>> why?
>>>> The IP addresses work fine. Must I do something on the switches
>>>> interconnecting the two. I ran debug ipv6 packet and debug ipv6 icmp and
>>>> it
>>>> tells me that encapsulation failed???? Can someone shed some light on
>>>> what
>>>> the problem may be
>>>>
>>>> R3
>>>> ipv6 cef
>>>> !
>>>> ipv6 unicast-routing
>>>> !
>>>> int ethernet0/0
>>>> ip address 139.1.0.3 255.255.255.0
>>>> ipv6 address 2001:CC1E:1:10::3/64
>>>>
>>>> R6
>>>> !
>>>> ipv6 cef
>>>> !
>>>> ipv6 unicast-routing
>>>>
>>>> int ethernet0/1
>>>> ip address 139.1.0.6 255.255.255.0
>>>> ipv6 address 2001:CC1E:1:10::6/64
>>>>
>>>>
>>>> DEBUG OUTPUT
>>>> R3#PING 2001:CC1E:1:10::6
>>>>
>>>> Type escape sequence to abort.
>>>> Sending 5, 100-byte ICMP Echos to 2001:CC1E:1:10::6, timeout is 2
>>>> seconds:
>>>>
>>>> *Dec 13 17:39:43.111: IPV6: source FE80::2 (Serial2/3)
>>>> *Dec 13 17:39:43.111: dest FF02::5
>>>> *Dec 13 17:39:43.111: traffic class 224, flow 0x0, len 80+4, prot
>>>> 89,
>>>> hops
>>>> 1, forward to ulp
>>>> *Dec 13 17:39:44.831: IPv6: SAS picked source 2001:CC1E:1:10::3 for
>>>> 2001:CC1E:1:
>>>> 10::6 (Ethernet0/0)
>>>> *Dec 13 17:39:44.831: ICMPv6: Sending echo request to 2001:CC1E:1:10::6
>>>> *Dec 13 17:39:44.831: IPV6: source 2001:CC1E:1:10::3 (local)
>>>> *Dec 13 17:39:44.831: dest 2001:CC1E:1:10::6 (Ethernet0/0)
>>>> *Dec 13 17:39:44.831: traffic class 0, flow 0x0, len 100+0, prot
>>>> 58,
>>>> hops
>>>> 64, originating
>>>> *Dec 13 17:39:44.831: IPV6: source 2001:CC1E:1:10::3 (local)
>>>> *Dec 13 17:39:44.831: dest FF02::1:FF00:6 (Ethernet0/0)
>>>> *Dec 13 17:39:44.831: traffic class 224, flow 0x0, len 72+8, prot
>>>> 58,
>>>> hops
>>>> 255, originating
>>>> *Dec 13 17:39:44.831: IPv6: Sending on Ethernet0/0
>>>> **Dec 13 17:39:44.831: IPv6: Encapsulation failed*
>>>> *Dec 13 17:39:44.831: IPv6: Resolving next hop 2001:CC1E:1:10::6 on
>>>> interface Et
>>>> hernet0/0
>>>> *Dec 13 17:39:44.831: IPv6: Resolving next hop 2001:CC1E:1:10::6 on
>>>> interface Et
>>>> hernet0/0
>>>> *Dec 13 17:39:45.831: IPV6: source 2001:CC1E:1:10::3 (local)
>>>> *Dec 13 17:39:45.831: dest FF02::1:FF00:6 (Ethernet0/0)
>>>> *Dec 13 17:39:45.831: traffic class 224, flow 0x0, len 72+8, prot
>>>> 58,
>>>> hops
>>>> 255, originating
>>>> *Dec 13 17:39:45.831: IPv6: Sending on Ethernet0/0.
>>>> *Dec 13 17:39:46.831: IPV6: source 2001:CC1E:1:10::3 (local)
>>>> *Dec 13 17:39:46.831: dest FF02::1:FF00:6 (Ethernet0/0)
>>>> *Dec 13 17:39:46.831: traffic class 224, flow 0x0, len 72+8, prot
>>>> 58,
>>>> hops
>>>> 255, originating
>>>> *Dec 13 17:39:46.831: IPv6: Sending on Ethernet0/0
>>>> *Dec 13 17:39:46.831: IPv6: SAS picked source 2001:CC1E:1:10::3 for
>>>> 2001:CC1E:1:
>>>> 10::6 (Ethernet0/0)
>>>> *Dec 13 17:39:46.831: ICMPv6: Sending echo request to 2001:CC1E:1:10::6
>>>> *Dec 13 17:39:46.831: IPV6: source 2001:CC1E:1:10::3 (local)
>>>> *Dec 13 17:39:46.831: dest 2001:CC1E:1:10::6 (Ethernet0/0)
>>>> *Dec 13 17:39:46.831: traffic class 0, flow 0x0, len 100+0, prot
>>>> 58,
>>>> hops
>>>> 64, originating
>>>> *Dec 13 17:39:46.831: IPv6: Encapsulation failed
>>>> *Dec 13 17:39:46.831: IPv6: Resolving next hop 2001:CC1E:1:10::6 on
>>>> interface Et
>>>> hernet0/0
>>>> *Dec 13 17:39:46.831: IPv6: Resolving next hop 2001:CC1E:1:10::6 on
>>>> interface Et
>>>> hernet0/0
>>>>
>>>>
>>>> Blogs and organic groups at http://www.ccie.net
>>>>
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>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> Bryan Bartik
>>> CCIE #23707 (R&S, SP), CCNP
>>> Sr. Support Engineer - IPexpert, Inc.
>>> URL: http://www.IPexpert.com
>>>
>>
>>
>
>
> --
> Bryan Bartik
> CCIE #23707 (R&S, SP), CCNP
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

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Received on Sun Dec 13 2009 - 16:37:47 ART