Switchport Backup Interface - Cisco Catalyst 3030 Command Reference Manual

Chapter 2 Cisco Catalyst Blade Switch 3030 Cisco IOS Commands

switchport backup interface

Use the switchport backup interface interface configuration command on a Layer 2 interface to
configure Flex Links, a pair of interfaces that provide backup to each other. Use the no form of this
command to remove the Flex Links configuration.
Syntax Description
interface-id
mmu
primary vlan vlan-id
preemption
forced
bandwidth
off
delay delay-time
Defaults The default is to have no Flex Links defined.
Preemption mode is off. No preemption occurs.
Preemption delay is set to 35 seconds.
Command Modes Interface configuration
Command History Release
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switchport backup interface {interface-id} mmu primary vlan vlan-id
switchport backup interface {interface-id} preemption [forced | bandwidth | off] | [delay
delay-time]
no switchport backup interface {interface-id} mmu primary vlan vlan-id
no switchport backup interface {interface-id} preemption [forced | bandwidth | off] | [delay]
Specify that the Layer 2 interface to act as a backup link to the interface
being configured. The interface can be a physical interface or port channel.
The port-channel range is 1 to 48.
Configure the MAC move update (MMU) for a backup interface pair.
The VLAN ID of the private-VLAN primary VLAN; valid range is 1 to 4094.
Configure a preemption scheme for a backup interface pair.
(Optional) Specify that the interface always preempts the backup.
(Optional) Specify that the interface with the higher available bandwidth
always preempts the backup.
(Optional) Specify that no preemption occurs from backup to active.
(Optional) Specify a preemption delay; the valid values are 1 to 300 seconds.
Modification
This command was introduced.
Cisco Catalyst Blade Switch 3030 Command Reference
switchport backup interface
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