Specifications

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Cisco Catalyst Blade Switch for HP Command Reference
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Chapter 2 Cisco Catalyst Blade Switch 3020 for HP Cisco IOS Commands
switchport backup interface
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.
switchport backup interface {interface-id} [mmu primary vlan vlan-id | preemption {delay
delay-time | mode {bandwidth | forced | off}}]
no switchport backup interface {interface-id} [mmu primary vlan | preemption {delay | mode}]
Syntax Description
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
interface-id 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.
mmu Configure the MAC move update (MMU) for a backup interface pair.
primary vlan vlan-id The VLAN ID of the private-VLAN primary VLAN; valid range is 1 to 4094.
preemption Configure a preemption scheme for a backup interface pair.
mode Specifies a preemption mode as bandwidth, forced, or off.
bandwidth (Optional) Specify that the interface with the higher available bandwidth
always preempts the backup.
forced (Optional) Specify that the interface always preempts the backup.
off (Optional) Specify that no preemption occurs from backup to active.
delay delay-time (Optional) Specify a preemption delay; the valid values are 1 to 300 seconds.
Release Modification
12.2(25)SEF This command was introduced.