static entry in the mac-address-table

Unanswered Question
Feb 16th, 2009


Please if, I use more than one interface for a unique mac adresse in the command ""mac-address-table static"", in this case, the switch will use the first interface declared or it will forward the frame to the all interfaces configured ??

thanks for help

I have a catalyst 3550 with IOS Version 12.1(13)EA1c

and Catalyst 4506 L3 Switch with IOS Version 12.2(25)EWA6

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
mahmoodmkl Mon, 02/16/2009 - 07:34


I think it will replace the earlier configured entry with the new one and it will be used becoz u cannot define a unique mac-address on two interfaces and that would be considered a loop.



Roberto Salazar Mon, 02/16/2009 - 10:17

You cannot configure a switch to have a unicast mac-address on multiple ports static or dynamic. You cannot do this but I am not sure what kind of error you will see or whether it will overwrite the previous static mac entry.

f-maazouzi Tue, 02/17/2009 - 03:36


I have this configuration :

SWITCH# sh run

mac-address-table static xxxx.xxxx.xxxx vlan y interface GigabitEthernet0/11 Gi



Mac Address Table


Vlan Mac Address Type Ports

---- ----------- -------- -----

Y xxxx.xxxx.xxxx STATIC Gi0/1 Gi0/11


in my topology, the host with the mac address xxxx.xxxx.xxxx is connected directly with the port G0/1, but it can be reached via the port G0/11 by anathor switch.



This Discussion