Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Community Member

Question about 3750 stack SVI mac-address

I have a question about 3750 stack. If master stack fail, new master will take old master, then SVI mac-address will be change.

3750 any command make SVI mac-address will not change?

3 REPLIES
Community Member

Re: Question about 3750 stack SVI mac-address

Hi

I hope the persistence MAC address feature will help you out.

but you can use the " Persistense MAC address " faeture .

if you enable this then if the master goes down then by default it will keep the old mac address for 4 minutes by default.

and after the expiration of the time the MAC address will be replaced by the new stack master MAC address.

But  if you enter the command with a "0" value parameter in that case the MAC address will be there until you enter the no command.

The command is

stack-mac persistent timer 0

Note: beware of the consecuences in the production network

Plz rate it if found useful

Thanks

Community Member

Re: Question about 3750 stack SVI mac-address

thank you for your relpy.

STACK MAC Persistent Timer 0 this command do impact of network (such as STP, etherchannel, routing.....) ?

Community Member

Re: Question about 3750 stack SVI mac-address

Hi

it will not create a problem in normal case.

But if you are using the old master switch whose MAC address is binded in the stack in the same network.

there may be a chance of duplicate MAC address and network outage.

So to avoid this don't plug the removed master switch in the network.

plz rate this if you found it useful.

Thanks

1156
Views
0
Helpful
3
Replies
CreatePlease to create content