Cisco Catalyst 2960-XR

stack-mac persistent timer
To enable the persistent MAC address feature, use the stack-mac persistent timer command in global
configuration mode on the switch stack or on a standalone switch. To disable the persistent MAC address
feature, use the no form of this command.
stack-mac persistent timer [0| time-value]
no stack-mac persistent timer
Syntax Description
(Optional) Continues using the MAC address of the current stack master after a new stack
master takes over.
0
(Optional) Time period in minutes before the stack MAC address changes to that of the
new stack master. The range is 1 to 60 minutes. When no value is entered, the default is
4 minutes. We recommend that you configure an explicit value for this command.
time-value
Command Default
Persistent MAC address is disabled. The MAC address of the stack is always that of the first stack master.
When the command is entered with no value, the default time before the MAC address changes is four minutes.
We recommend that you configure an explicit value for this command.
Command Modes
Global configuration
Command History
ModificationRelease
This command was introduced.Cisco IOS 15.0(2)EX1
Usage Guidelines
The MAC address of the switch stack is determined by the MAC address of the stack master. In the default
state (persistent MAC address disabled), if a new switch becomes stack master, the stack MAC address changes
to the MAC address of the new stack master.
When persistent MAC address is enabled, the stack MAC address does not change for a time period. During
that time, if the previous stack master rejoins the stack as a stack member, the stack retains its MAC address
for as long as that switch is in the stack. If the previous stack master does not rejoin the stack during the
specified time period, the switch stack takes the MAC address of the new stack master as the stack MAC
address.
You can set the time period to be from 0 to 60 minutes.
•
If you enter the command with no value, the default delay is 4 minutes.
•
If you enter 0, the stack continues to use the current stack MAC address until you enter the no stack-mac
persistent timer command.
Catalyst 2960-XR Switch Stack Manager Command Reference, Cisco IOS Release 15.0(2)EX1
32 OL-29435-01
Stack Manager Commands
stack-mac persistent timer