11-18-2008 07:00 PM - edited 03-04-2019 12:23 AM
Hi,
I have a question with regards to traceroute ... When I do a traceroute, at times I see something lke this ...
1 10.10.10.10 4 msec 0 msec 4 msec
10.10.10.11 4 msec 0 msec 4 msec
10.10.10.10 4 msec 0 msec 4 msec
2 10.10.11.1 0 msec 0 msec 0 msec
10.10.11.2
10.10.11.1
3 172.31.2.4 16 msec 4 msec 8 msec
My questions is why are we seeing 3 IPs like in the 1st hop ? What does it mean ?
Thank you,
Cheers,
- InternetB -
Solved! Go to Solution.
11-18-2008 07:51 PM
You will see this when the router has multiple paths to the same destination.
So if you log onto the first hop router and and do a "sh ip route" you should see 2 next-hops for the destination IP address you are tracerouting to.
Jon
11-18-2008 07:51 PM
You will see this when the router has multiple paths to the same destination.
So if you log onto the first hop router and and do a "sh ip route" you should see 2 next-hops for the destination IP address you are tracerouting to.
Jon
11-18-2008 11:08 PM
Just to add to Jon's post that this will be the case only when you try to trace from a cisco device and not from a desktop.
This is because the packets originated from the cisco device are process switched and hence the 3 trace probes are sent in a loadbalanced fashion.
Trace packets from a desktop would be CEF switched to a flow path already established and will not exhibit this behavior
Narayan
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