Cisco Catalyst 2960 Software Configuration Manual page 201

Chapter 7 Managing Switch Stacks
Beginning in privileged EXEC mode, follow these steps to enable persistent MAC address. This
procedure is optional.
Command
Step 1 configure terminal
Step 2
stack-mac persistent timer [0 | time-value]
Step 3
end
Step 4
show running-config
or
show switch
Step 5 copy running-config startup-config
Use the no stack-mac persistent timer global configuration command to disable the persistent MAC
address feature.
OL-26520-01
Purpose
Enter global configuration mode.
Enable a time delay after a stack-master change before the stack
MAC address changes to that of the new stack master. If the previous
stack master rejoins the stack during this period, the stack uses that
MAC address as the stack MAC address.
Enter the command with no value to set the default delay of
•
4 minutes. We recommend that you always configure a value.
Enter 0 to use the MAC address of the current master
•
indefinitely.
Enter a time-value from 1 to 60 to configure the time period (in
•
minutes) before the stack MAC address changes to the new
master.
When you enter this command, a warning states that traffic
Caution
might be lost if the old master MAC address appears
elsewhere in the network domain.
If you enter the no stack-mac persistent timer command after a new
stack master takes over, before the time expires, the stack uses the
current master MAC address.
Return to privileged EXEC mode.
Verify that the stack MAC address timer is enabled.
The output shows
minutes.
The output shows
minutes configured and the stack MAC address.
(Optional) Save your entries in the configuration file.
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
Configuring the Switch Stack
stack-mac persistent timer
Mac persistency wait time
and the time in
with the number of
7-19