From: Copleston Daniel (Daniel.Copleston@ukomfs.com)
Date: Tue Nov 19 2002 - 17:05:10 GMT-3
I have noticed that with OSPF in the lab at work before. It is highly
repeatable and is you use an extended traceroute to send more probes per hop
you will see every alternate packet times out. Debugs do not show anything
useful, and extended pings show no loss. You can even get it to occur
routing between loopbacks on the same device.
I had just assumed it was a quirk of the implementation of traceroute
handling on the version of IOS I was using. There appear to be quite a few
oddities with pings and traceroutes, another I have found is that if you set
up a situation whereby you have traffic leaving via a tunnel on one router
but the traffic is returning to that router not via the tunnel but via
another interface on the router pings will often not work but IP does
(albeit in a mis-configured asymmetric kind of way....).
Just my experience on this,
Daniel
-----Original Message-----
From: Kyaw Khine [mailto:kkhine@register.com]
Sent: 19 November 2002 18:55
To: 'ccielab@groupstudy.com'
Subject: Lost packet in traceroute
Hi Group,
I'm seeing a packet drop when I traceroute to a neighbor router.
It's always like this that the middle packet is dropped.
Tracing the route to
1 s4-0.core1.nyat.register.com (209.67.51.1) 4 msec * 4 msec
Any thoughts what is going on?
Thanks ..
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