Specifications

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Cisco ME 3400 Ethernet Access Switch Command Reference
OL-9640-07
Chapter 2 Cisco ME 3400 Ethernet Access 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-id | GigabitEthernet interface-id |
Port-channel interface-id] {mmu primary vlan interface-id | multicast fast-convergence |
preemption {delay delay-time | mode} | prefer vlan vlan-id}
no switchport backup interface [FastEthernet interface-id | GigabitEthernet interface-id |
Port-channel interface-id] {mmu primary vlan interface-id | multicast fast-convergence |
preemption {delay delay-time | mode} | prefer vlan vlan-id}
To use this command, the switch must be running the metro access or metro IP access image.
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
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.
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 486.
mmu MAC-address move update. 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
4,094.
multicast
fast-convergence
Multicast Fast-convergence parameter.
preemption Configure a preemption scheme for a backup interface pair.
delay delay-time (Optional) Specify a preemption delay; the valid values are 1 to 300 seconds.
mode Specify a preemption mode as bandwidth, forced, or off.
prefer vlan vlan-id Specify that VLANs are carried on the backup interfaces of a Flex Link pair.
VLAN ID range is 1 to 4,094.
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.