Switchport Backup Interface - Cisco Catalyst 3750-X Command Reference Manual

switchport backup interface

switchport backup interface
Use the switchport backup interface interface configuration command on a Layer 2 interface on the
switch stack or on a standalone switch 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 FastEthernet
GigabitEthernet
Port-channel
TenGigabitEthernet
mmu
primary
multicast
fast-convergence
preemption
delay
mode
prefer
vlan vlan-name
Defaults
The default is to have no Flex Links defined. The preemption mode is off. No preemption occurs.
Preemption delay is set to 35 seconds.
Command Modes
Interface configuration
Command History Release
12.2(53)SE2
Catalyst 3750-X and 3560-X Switch Command Reference
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switchport backup interface [FastEthernet interface-name | GigabitEthernet interface-name |
Port-channel interface-name | TenGigabitEthernet interface-name ] {mmu primary vlan
interface-name | multicast fast-convergence | preemption {delay interface-name | mode} |
prefer vlan name}
no switchport backup interface [FastEthernet interface-name | GigabitEthernet interface-name
| Port-channel interface-name | TenGigabitEthernet interface-name] {mmu primary vlan
interface-name | multicast fast-convergence | preemption {delay interface-name | mode} |
prefer vlan name}
FastEthernet IEEE 802.3 port name. Valid range is 0 to 9.
GigabitEthernet IEEE 802.3z port name. Valid range is 0 to 9.
Ethernet Channel of interface. Valid range is 0 to 48.
Ten Gigabit Ethernet port name. Valid range is 0 to 9.
MAC-address move update. Configure the MAC move update (MMU) for
a backup interface pair.
MAC-address move update primary VLAN ID number. Valid range is 0 to
4,094.
Multicast parameters.
Fast-convergence parameter.
Configure a preemption scheme for a backup interface pair.
Preemption parameters in seconds. Valid range is 1 to 300.
Set the preemption mode.
Load-balancing.
The VLAN ID of the primary VLAN. Valid range is 1 to 4,094.
Modification
This command was introduced.
Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
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