Cisco SG300 Link State UP but not mac address on table

[JDAN91]

Hello,

This is my first question on the community and also I'm a newbie on networking
I would like to know if someone can explain to me why when I do a show interfaces status command I get one port with a state link up but if I look on the mac address table for that interface, I do not get any mac address.

Thank you very much for the answers

[Reza Sharifi]

Hi,

Welcome to the community!

What is connected to port gi12?  Can you ping the device first and than issue the "sh mac address-table" command again?

HTH

[JDAN91]

Hello,

it's a little complicated identify what is connected, due the network is little messy I'm trying to identify all the nodes on the net, so that's why I was looking ad the mac address first.

is there any way besides disconnecting the cable and wait to see who complains to see which is the attached device?
:D

[GIBassment1]

Hi I see this was a few years ago.. did you ever determine the root cause of the missing MAC whilst the link was active?