10-17-2014 06:09 AM - edited 03-07-2019 09:09 PM
When I run the command "show ip traffic" on a 3750X switch, I see some output like this:
UDP statistics:
Rcvd: 24289 total, 0 checksum errors, 24289 no port
Sent: 0 total, 0 forwarded broadcasts
What does the # by "no port" mean? Are packets for "no port" correctly propagated?
10-24-2014 08:30 PM
I have seen the same on my 2811 router. Seem if the device isn't expecting something on a particular UDP port it increments this counter. In my case my rounter is incrementing this value because of unexpected UDP port 137 traffic.
UDP statistics:
Rcvd: 11353897 total, 0 checksum errors, 11110169 no port
Sent: 66093 total, 0 forwarded broadcasts
10-25-2014 07:31 AM
Hi,
Increasing "no port" means : Number of times a packet was received that was directed to a port with no application listening.
It probable cause can be Layer 1 problem especially in fiber optic links. check your connections first.
Then inspect your cpu processes for noticeable spikes.
HTH
Houtan
10-25-2014 12:17 PM
I'm seeing the same high count on my side and it increase pretty regularly. How do you track down the cause? I have a couple of fiber links plugged in but I'm not aware of any issues with them.
10-25-2014 01:59 PM
I had similar experience before and find the faulty port by disconnecting them one by one.
Houtan
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