Switchport Backup Interface - Cisco Catalyst 3030 Command Reference Manual

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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

primary vlan vlan-id

delay delay-time

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

switchport backup interface {interface-id} mmu primary vlan vlan-id

switchport backup interface {interface-id} preemption [forced | bandwidth | off] | [delay

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