Cisco Catalyst 3750-X Command Reference

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Catalyst 3750-X and 3560-X Switch Command Reference
OL-29704-01
Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
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.
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}
Syntax Description
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
FastEthernet FastEthernet IEEE 802.3 port name. Valid range is 0 to 9.
GigabitEthernet GigabitEthernet IEEE 802.3z port name. Valid range is 0 to 9.
Port-channel Ethernet Channel of interface. Valid range is 0 to 48.
TenGigabitEthernet
Ten Gigabit Ethernet port name. Valid range is 0 to 9.
mmu MAC-address move update. Configure the MAC move update (MMU) for
a backup interface pair.
primary MAC-address move update primary VLAN ID number. Valid range is 0 to
4,094.
multicast Multicast parameters.
fast-convergence Fast-convergence parameter.
preemption Configure a preemption scheme for a backup interface pair.
delay Preemption parameters in seconds. Valid range is 1 to 300.
mode Set the preemption mode.
prefer Load-balancing.
vlan vlan-name The VLAN ID of the primary VLAN. Valid range is 1 to 4,094.
Release Modification
12.2(53)SE2 This command was introduced.

Cisco Catalyst 3750-X Specifications

General

Brand	Cisco
Model	Catalyst 3750-X
Category	Switch
Language	English