Configuring The Mac Address-Table Move Update Feature - Cisco IE-3000-8TC Software Configuration Manual

Configuring Flex Links and the MAC Address-Table Move Update
When a Flex Link interface comes up, VLANs preferred on this interface are blocked on the peer
interface and moved to the forwarding state on the interface that has just come up. In this example, if
interface Gi1/1 comes up, VLANs preferred on this interface are blocked on the peer interface Gi1/2 and
forwarded on Gi1/1.
Switch#show interfaces switchport backup
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
GigabitEthernet1/1
Vlans Preferred on Active Interface: 1-50
Vlans Preferred on Backup Interface: 60, 100-120
Switch#show interfaces switchport backup detail
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
FastEthernet1/3
Vlans Preferred on Active Interface: 1-2,5-4094
Vlans Preferred on Backup Interface: 3-4
Preemption Mode
Bandwidth : 10000 Kbit (Fa1/3), 100000 Kbit (Fa1/4)
Mac Address Move Update Vlan : auto

Configuring the MAC Address-Table Move Update Feature

This section contains this information:
•
•
Beginning in privileged EXEC mode, follow these steps to configure an access switch to send MAC
address-table move updates:
Command
Step 1
configure terminal
Step 2 interface interface-id
Step 3
switchport backup interface interface-id
or
switchport backup interface interface-id mmu
primary vlan vlan-id
Cisco IE 3000 Switch Software Configuration Guide
22-12
Backup Interface
GigabitEthernet1/2 Active Up/Backup Up
Backup Interface
FastEthernet1/4
: off
Configuring a switch to send MAC address-table move updates
Configuring a switch to get MAC address-table move updates
Chapter 22 Configuring Flex Links and the MAC Address-Table Move Update Feature
State
State
Active Down/Backup Up
Purpose
Enter global configuration mode.
Specify the interface, and enter interface configuration
mode. The interface can be a physical Layer 2 interface or
a port channel (logical interface). The port-channel range
is 1 to 6.
Configure a physical Layer 2 interface (or port channel),
as part of a Flex Link pair with the interface. The MAC
address-table move update VLAN is the lowest VLAN ID
on the interface.
Configure a physical Layer 2 interface (or port channel)
and specify the VLAN ID on the interface, which is used
for sending the MAC address-table move update.
When one link is forwarding traffic, the other interface is
in standby mode.
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