Re: IPV6 addressing and ICMP

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
>>>
>>>
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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