From: Ryder, Keith (Keith.Ryder@globalcrossing.com)
Date: Wed Apr 04 2007 - 08:38:01 ART
LH
Thanks for the reply.
Yes but it is even more complex.
The site has MHSRP and multiple layer 3 switches.
Both of the site routers exchange EIGRP routes with the layer 3
switches.
Also the network in on MPLS.
Another if I ping the LAN interface or trace then I get a single
response port unreachable.
If I trace to Any LAN IP address the router processes 6 time exceeded
packets.
I.E from router A to router B trace to 10.68.0.8 (EIGRP neighbour on
router B
This is the respnce from router B perspective.
Apr 4 12:32:23.033 BST: ICMP: time exceeded (time to live) sent to
192.168.244.26 (dest was 10.68.0.8)
Apr 4 12:32:23.109 BST: ICMP: time exceeded (time to live) sent to
192.168.244.26 (dest was 10.68.0.8)
Apr 4 12:32:23.133 BST: ICMP: time exceeded (time to live) sent to
192.168.244.26 (dest was 10.68.0.8)
Apr 4 12:32:23.177 BST: ICMP: time exceeded (time to live) sent to
192.168.244.26 (dest was 10.68.0.8)
Apr 4 12:32:23.209 BST: ICMP: time exceeded (time to live) sent to
192.168.244.26 (dest was 10.68.0.8)
Apr 4 12:32:23.241 BST: ICMP: time exceeded (time to live) sent to
192.168.244.26 (dest was 10.68.0.8)
This is the output from router A
1 192.168.244.25 24 msec 20 msec 20 msec
2 192.168.244.58 [AS 64513] 72 msec 24 msec 32 msec
3 192.168.244.58 [AS 64513] 40 msec 32 msec 36 msec <<<<router B WAN
IP
4 * * *
5 * * *
6 * * *
Keith
-----Original Message-----
From: Leigh Harrison [mailto:ccileigh@gmail.com]
Sent: 04 April 2007 11:00
To: Ryder, Keith
Cc: ccielab@groupstudy.com
Subject: Re: OT Traceroute problem
Hi there,
I've seen this happen when I've been sent back icmp redirects and my
routing has been sent a different way. I've also had it where I've
missed a few hops, then magically appear redirected over a different
route.
Have you got glbp/hsrp or any kind of load balancing on the wan router?
LH
Ryder, Keith wrote:
> The problem is that traceroute shows duplicate address as below.
>
>
>
> Trace 10.68.1.41
>
> 1 <1 ms <1 ms <1 ms 10.1.63.252
>
> 2 1 ms <1 ms 1 ms 193.195.216.63
>
> 3 16 ms 16 ms 16 ms 192.168.244.25
>
> 4 22 ms 22 ms 23 ms 192.168.244.58
>
> 5 22 ms 22 ms 22 ms 192.168.244.58
>
> 6 22 ms 22 ms 22 ms 10.68.0.8
>
> 7 21 ms 23 ms 21 ms 10.68.1.41
>
>
>
> It occurs for every device on the local LAN but not when traced to the
> router Ethernet LAN address.
>
> I have seen an explanation of duplicate entries but cannot find it
> anymore.
>
> Can anyone help?
>
> 192.168.244.58 is the router WAN ip address.
>
>
>
> Could it be a LAN problem?
>
>
This archive was generated by hypermail 2.1.4 : Tue May 01 2007 - 08:28:34 ART