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mac-persistence-timer

Syntax

Hierarchy Level

Description

Specify how long the Virtual Chassis or VCF continues to use the MAC address of the switch that was originally configured in the primary role as the system MAC base address after the original primary switch is removed from the Virtual Chassis or VCF. The system MAC base address does not change in the event of a switchover provided the switch originally configured in the primary role remains a member of the Virtual Chassis or VCF.

The maximum timer limit is 60 minutes starting in Junos OS Release 12.2. There are no minimum or maximum timer limits in prior Junos OS releases.

Default

The MAC persistence timer is set to 10 minutes by default.

Options

minutes

Time in minutes that the member switch in the backup role continues to use the system MAC base address of the old primary before using its own system MAC base address after the switch in the primary role is physically disconnected or removed from the Virtual Chassis or VCF.

disable

Disable the MAC persistence timer. The system MAC base address never changes when the MAC persistence timer is disabled, even when the switch in the primary role is physically disconnected or removed from the Virtual Chassis or VCF.

Required Privilege Level

system—To view this statement in the configuration.

system-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 9.0.

Option disable introduced in Junos OS Release 12.2 for EX Series switches.

The maximum timer limit changed from no maximum timer limit to 60 minutes in Junos OS Release 12.2 for EX Series switches.