Configuring The Mac Address-Table Move Update Feature - Cisco 3845 - Security Bundle Router Software Manual

Chapter 17 Configuring Flex Links and the MAC Address-Table Move Update Feature
Vlans Preferred on Active Interface: 1-50
Vlans Preferred on Backup Interface: 60, 100-120
When a Flex Link interface goes down (LINK_DOWN), VLANs preferred on this interface are moved
to the peer interface of the Flex Link pair. In this example, if interface gigabitethernet port 0/6 goes
down, gigabitethernet port 0/8 carries all VLANs of the Flex Link pair.
Switch# show interfaces switchport backup
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
GigabitEthernet0/6
Vlans Preferred on Active Interface: 1-50
Vlans Preferred on Backup Interface: 60, 100-120
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 0/6 comes up, VLANs preferred on this interface are blocked on the peer interface 0/8 and
forwarded on 0/6.
Switch# show interfaces switchport backup
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
GigabitEthernet0/6
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
------------------------------------------------------------------------
GigabitEthernet 0/3
Vlans Preferred on Active Interface: 1-2,5-4094
Vlans Preferred on Backup Interface: 3-4
Preemption Mode
Bandwidth : 10000 Kbit (Gi 0/3), 100000 Kbit (Gi0/4)
Mac Address Move Update Vlan : auto

Configuring the MAC Address-Table Move Update Feature

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OL-23400-01
Backup Interface
GigabitEthernet0/8
Backup Interface
GigabitEthernet0/8
Backup Interface
GigabitEthernet 0/4
: off
Configuring a switch to send MAC address-table move updates
Configuring a switch to get MAC address-table move updates
Configuring Flex Links and MAC Address-Table Move Update
State
Active Down/Backup Up
State
Active Up/Backup Standby
State
Active Down/Backup Up
Cisco ME 3800X and 3600X Switch Software Configuration Guide
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