Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements
Webcast-Catalyst9k
New Member

Extended traceroute

Need some advice on the extended traceroute. "Port Number" field is the destination port used by the UDP probe messages as described in cisco.com. But when I did a extended traceroute with the port number set at 1 and at the destination, I had debugging turned on, I captured the below results. Noticed that the destination port number was incremented for every probe count. Is this how the "Port Number" field is supposed to work?

UDP: rcvd src=10.10.10.1(37202), dst=20.20.20.10(1), length=8

UDP: rcvd src=10.10.10.1(39755), dst=20.20.20.10(2), length=8

UDP: rcvd src=10.10.10.1(39844), dst=20.20.20.10(3), length=8

UDP: rcvd src=10.10.10.1(40972), dst=20.20.20.10(4), length=8

UDP: rcvd src=10.10.10.1(42081), dst=20.20.20.10(5), length=8

UDP: rcvd src=10.10.10.1(35555), dst=20.20.20.10(6), length=8

UDP: rcvd src=10.10.10.1(39020), dst=20.20.20.10(7), length=8

UDP: rcvd src=10.10.10.1(36080), dst=20.20.20.10(8), length=8

UDP: rcvd src=10.10.10.1(37305), dst=20.20.20.10(9), length=8

UDP: rcvd src=10.10.10.1(34199), dst=20.20.20.10(10), length=8

1 REPLY
Bronze

Re: Extended traceroute

This is standard traceroute behavior. Apparently the port number field just determines which port the traceroute starts at.

753
Views
0
Helpful
1
Replies
CreatePlease to create content