Configuring Mac Address-Table Move Update - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 24 Configuring Flex Links and MAC Address-Table Move Update
When a Flex Links interface becomes active, 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 Fast Ethernet port 1/6 becomes active, VLANs preferred on this interface are blocked on the
peer interface Fast Ethernet port 1/8 and forwarded on Fast Ethernet port 1/6.
Switch# show interfaces switchport backup
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
FastEthernet1/6
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
------------------------------------------------------------------------
FastEthernet1/6
Vlans Preferred on Active Interface: 1-50
Vlans Preferred on Backup Interface: 60, 100-120
Preemption Mode
Bandwidth : 10000 Kbit (Fa1/6), 100000 Kbit (Fa1/8)
Mac Address Move Update Vlan : auto

Configuring MAC Address-Table Move Update

These sections contain this configuration information:
•
•
•
Default Configuration
By default, the MAC address-table move update feature is disabled.
Configuration Guidelines
Follow these guidelines to configure the MAC address-table move update feature:
•
•
Backup Interface
FastEthernet1/8
Backup Interface
FastEthernet1/8
: off
Default Configuration, page 24-5
Configuration Guidelines, page 24-5
Configuring MAC Address-Table Move Update, page 24-9
Enable mac address-table move transmit on the switch with Flex Links configured to send MAC
address-table move updates.
Enable mac address-table move receive on all upstream switches to process MAC address-table
move updates.
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Configuring MAC Address-Table Move Update
State
Active VLB cfg/Backup VLB cfg
State
Active VLB cfg/Backup VLB cfg
24-9