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Q&A - Why are my devices showing static MAC addresses in the ASE MAC Table?

Q&A - Why are my devices showing static MAC addresses in the ASE MAC Table?

Question

Why are my devices that were learned on the port, showing static MAC addresses in the MAC Table?

Answer

MAC address learned on a port are normally shown as dynamic ( dynamically learned )  MAC addresses, but this will change with some security settings.

Example;

Port security is the reason for the mac addresses being static here - 

With port security:

 

NV1560# show run interface GigabitEthernet 1/4

Building configuration...

interface GigabitEthernet 1/4

no poe mode

qos trust tag

speed auto 10 100 1000

description Connected to Customer LAN and VoIP Phones

port-security

!

end

NV1560# show mac address-table

Type    VID  MAC Address       Ports

Static  1    00:0c:29:c9:70:74 GigabitEthernet 1/4

Static  1    a4:ba:db:1d:c5:39 GigabitEthernet 1/4

 

 

Without port security:

 

NV1560# show run interface gig 1/4

Building configuration...

interface GigabitEthernet 1/4

no poe mode

qos trust tag

speed auto 10 100 1000

description Connected to Customer LAN and VoIP Phones

!

End

 

NV1560# show mac address-table

Type    VID  MAC Address       Ports

Dynamic 1    00:0c:29:c9:70:74 GigabitEthernet 1/4

Dynamic 1    a4:ba:db:1d:c5:39 GigabitEthernet 1/4

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Last update:
‎10-28-2020 08:14 AM
Updated by:
 
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