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Beginner

No Port-Security, but static mac addresses appear in table

Hi everyone,

I have multiple stacks of 2960S-48FPS-L switches. 3 or 4 switches per stack.

All are running IOS 15.0(2)SE11

I have multiple devices, some on trunk ports, some on access ports, and they show up in my mac address table as STATIC entries, not DYNAMIC. Other devices do show up as DYNAMIC. I can't find a reason why there is a difference.

But I'm not running port-security, I haven't entered the mac address statically on the interface, and I'm not talking about the CPU entries. I can't clear the mac addresses from the table unless I shut/no shut the port or reload the switch.

Is this a bug? 

Why are they showing up as static? 

 

1 0000.aac1.1375 DYNAMIC Gi4/0/51
1 0008.3058.b599 DYNAMIC Gi4/0/50
1 0008.3058.b5c0 DYNAMIC Gi4/0/50
1 000c.2924.a50b STATIC Gi4/0/6
1 000c.29a4.15a0 STATIC Gi4/0/5
1 0050.56bd.bfcb STATIC Gi4/0/6
1 0050.56bd.d853 STATIC Gi4/0/5
1 04c5.a442.958a DYNAMIC Gi4/0/51
1 04c5.a442.95c0 DYNAMIC Gi4/0/51
1 1866.da18.ea2a DYNAMIC Gi4/0/50
1 9890.96e1.2c95 DYNAMIC Gi4/0/50
1 9890.96e1.880a DYNAMIC Gi4/0/51
1 9c93.4e67.3336 DYNAMIC Gi4/0/50
1 ac1f.6b47.238c STATIC Gi4/0/5
1 ac1f.6b47.2394 STATIC Gi4/0/6
1 ac1f.6b4b.fe7c STATIC Gi4/0/5
1 ac1f.6b4b.fe7f STATIC Gi4/0/9
1 ac1f.6b4b.fe80 STATIC Gi4/0/7
2 0025.84a2.04ae DYNAMIC Gi4/0/50
2 0026.0b5c.1cba DYNAMIC Gi4/0/50
2 0026.0b5c.a6d1 DYNAMIC Gi4/0/51

 

1 ACCEPTED SOLUTION

Accepted Solutions
Beginner

Re: No Port-Security, but static mac addresses appear in table

MAB was the answer. MAB apparently puts the authenticated mac address into the MAC Address table as a STATIC entry.
1 REPLY 1
Beginner

Re: No Port-Security, but static mac addresses appear in table

MAB was the answer. MAB apparently puts the authenticated mac address into the MAC Address table as a STATIC entry.
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