Re: Ping across auto IPV6 Tunnel - 50%

For sure ... that was one of my first thought. Since the ipv6 addresses are
really v4 addresses, I consulted the ipv4 routing table in both directions.
There is only a single path to each loopback and physical address

Roy, I appreciate your response. Any thoughts on additional debugs or show
commands?

On Tue, Sep 29, 2009 at 12:18 AM, Roy Waterman <roy.waterman_at_gmail.com>wrote:

> Hi Andrew
>
> So you've verified that there is no equal cost load balancing going on?
>
> Regards
> Roy
>
> 2009/9/29 ALL From_NJ <all.from.nj_at_gmail.com>
>
>> Hey team,
>>
>> Got this working tonight, auto ipv6 tunnels.
>>
>> Divin provided me this link:
>>
>> http://ardenpackeer.com/routing-protocols/tutorial-ipv6-tunnels-part-2-automatic-6to4-tunnels/
>> <-- this helped me much.
>>
>> Conceptually it helped me to consider this a 'hack' or 'cheat'. Kind of
>> neat in some ways too I guess ... by defining the IPv4 address as part of
>> the IPv6 address, you are really telling the router to find the remote
>> peer
>> by it's IPv4 address. Of course ... the IPv4 routing table needs to be
>> right before this will work ...
>>
>> Any who ... my question is related to ping. Has anyone else seen 50% ping
>> timeout when using auto tunnels? I get all responses to other frame relay
>> ipv6 peers or Ethernet peers etc ... . Here is the output, kind of looks
>> like a pacing issue, but the fact that other pings work 100% of the time
>> does not make sense.
>>
>> R1(config)#do ping 2001:3:3:3::3 sou 2001:1:1:1::1 re 10
>>
>> Sending 10, 100-byte ICMP Echos to 2001:3:3:3::3, timeout is 2 seconds:
>> Packet sent with a source address of 2001:1:1:1::1
>> !.!.!.!.!.
>> Success rate is 50 percent (5/10), round-trip min/avg/max = 32/32/36 ms
>>
>> I have static routes going to the remote tunnel peer.
>>
>> Trace works just fine, no timeouts, single hop. I tried it with and
>> without
>> ipv6 cef. I also did a debug ipv6 pack det and debug ipv6 icmp ...
>> nothing
>> out of the ordinary ...
>>
>> Any thoughts? Seen this?
>>
>> --
>> Andrew Lee Lissitz
>> all.from.nj_at_gmail.com
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>>
>>
>>
>>
>>
>>
>>
>
>
> --
> Regards
> Roy
>

-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net