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PowerConnect B-Series FCX Configuration Guide 129
53-1002266-01
Managing your IronStack
5
the stack MAC address changes. During this configured interval, if the previous Active Controller is
reinstalled in the stack, the stack continues to use the MAC address of this unit, even though it may
no longer be the Active Controller. If the previous Active Controller does not rejoin the stack during
the specified time interval, the stack assumes the address of the new Active Controller as the stack
MAC address.
The Persistent MAC Address feature allows you to configure a period of time during which the
original base MAC address will not change if the Active Controller fails, or is removed for
maintenance. This timer is triggered when the Standby Controller becomes the Active Controller.
When the timer expires, the new Active Controller will change the previous MAC address to its base
MAC address and advertise this MAC address to management VLANs to update the ARP peer table.
If you want to use the new address, you will have to re-enter the stack-persistent-mac-timer
command again to reactivate the persistent MAC address,
To enable Persistent MAC Address, enter the following command.
PowerConnect(config)# stack persistent-mac-timer 120
Syntax: [no] stack persistent-mac-timer <number>
The <number> variable is the number of minutes during which the IronStack will retain the original
MAC Address if the Active Controller fails or is removed for service. The valid value range is from 5 -
6000 minutes. If you enter a 0, it means “keep this address forever”. The default is 60 minutes.
To disable Persistent MAC Address, enter the following command.
PowerConnect(config)# no stack persistent-mac-timer
NOTE
If you enter the [no] version of this command while the persistent MAC address timer is active, the
stack will disregard the persistent MAC address and will assume the MAC address of the new Active
Controller.
NOTE
Persistent MAC and stack MAC cannot be used together.
In the following example, the persistent MAC timer has been set to the default of 60 minutes.
PowerConnect(config)# stack persistent-mac 60
PowerConnect(config)# show running-config
Current configuration:
!
ver 7.2.00aT7f1
!
stack 1
module 1 fcx-48-port-managment-module
module 2 fcx-cx4-2-port-16g-module
priority 80
stack 2
module 1 fcx-48-port-managment-module
module 2 fcx-cx4-2-port-16g-module
module 3 fcx-cx4-2-port-16g-module
stack 3
module 1 fcx-48-port-managment-module
module 2 fcx-cx4-2-port-16g-module