MTU size

[Pawan Arora]

Is there a way to check the current MTU size (as per the document 1500 is the default size) on CUCM?

we have a customer who is using cucm with nice recording server, there is some issue in the recording and as per them they are getting MTU size 1340 from CUCM in their logs.

Please let me know if there is any command to check the current MTU size.

[Nadav · Accepted solution]

Hi Pawan,

There is an easy way to check. Connect via browser to OS Administration on your CUCM. Go to the Show menu, and click on Network. The MTU will appear there.

[Manish Gogna · Accepted solution]

Hi Pawan,

You can try the following command:

admin:show network route detail

It will give you the MTU setting towards the bottom of the output, something like below from my lab server

ff00::/8 dev eth0  table 255  metric 256  expires 20098217sec mtu 1500 advmss 14

HTH

Manish