MAC Address Table issue

[StarLog]

We have a c9200L-48P-4G, I have 3 printers connected to the switch stack.
Gi1/0/39 - Cannon Color MF751
Gi1/0/20 - HP Color Pro MFP M283
Gi1/0/3 - Konika Minolta BizHub 364e

When I run "sh mac address-table" none of the ports show up in the report.

Any ideas why they do not show up?

Thanks

[alancelliott]

Are the printers powered up and turned on? What is the port status? "show ip int brief" or "show int status" ensure the ports are up/up.

[StarLog]

Yes ports up/up and printers are on

[MHM Cisco World]

Show mac address dont show UP/Down status of Port' 

Show interface status 

Is give you detail 

MHM

[balaji.bandi · Accepted solution]

Gi1/0/39 - Cannon Color MF751
Gi1/0/20 - HP Color Pro MFP M283
Gi1/0/3 - Konika Minolta BizHub 364e

connected i take it as working, and you not able to see MAC address? try ping the IP and check you see arp table.

we have observed some time some devices on 17.6.X IOS XE, when we upgraded to 17.9.5 that fixed the issue.

but the device works and we dont see MAC, have not able to figureout what was the issue, only upgrade fixed.

[StarLog]

Hi balaji,

That makes sence, so I was able to create traffic and the printer showed up in the table.

[MHM Cisco World]

No need upgrade it normal 

If printer silent for time of mac aging the SW will remove it from table. 

There is aging for Mac in table, it so normal. 

MHM

[dannyboazjunior]

Hello dear,

verify these 3 ports status. they are up? sh int gig1/0/39 status  sh int gig1/0/20 status  sh int gig1/0/3 status

Gi1/0/39 - Cannon Color MF751
Gi1/0/20 - HP Color Pro MFP M283
Gi1/0/3 - Konika Minolta BizHub 364e

[Stefan Mihajlov]

@StarLog 

If the printers aren’t sending traffic, the switch won’t learn their MACs. Ping them to generate traffic and you’ll see the entries show up.

Best regards,
Stefan Mihajlov

Mark this post as Helpful if it helped you, and Accept as Solution if it resolved your question.

[StarLog]

We are all good, it was that there was no traffic.