Re: IPV6 addressing and ICMP

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

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Received on Sun Dec 13 2009 - 13:15:26 ART