Special mac address after show mac address

[wfqk]

Hi I got the following mac address after enter command in switch 2960. Anyone can explain it? thank you

SW# sh mac address-table
Mac Address Table
-------------------------------------------

Vlan Mac Address Type Ports
---- ----------- -------- -----
All 0100.0ccc.cccc STATIC CPU

[luis_cordova]

Hi @wfqk ,

I think this links can help you:

https://learningnetwork.cisco.com/thread/27560

https://community.cisco.com/t5/other-network-architecture/mulitcast-mac-address/td-p/586124

Regards

[Richard Burts]

Here is a link to a discussion in the Cisco Learning Network which explains this

https://learningnetwork.cisco.com/thread/27560

I hope you find it helpful.

HTH

Rick

[wfqk]

Thanks for your reply. From the post, we can see that is special mac address. the question is show mac address is one command that we often use. why we do not often see these mac address or its similar one when using the command? In another word, we do not see the mac address in most situation, and we rarely can see these mac address when using the show mac address. 

[luis_cordova]

Hi @wfqk ,

Maybe this discussion can give some help:

https://community.cisco.com/t5/switching/what-switches-do-with-their-mac-address/td-p/2594133

Regards