Consolidated Platform Configuration Guide, Cisco Ios Release 15.2(4)E (Catalyst 2960-X Switches - Cisco Catalyst 2960 series Configuration Manual

How to Configure Flex Links and the MAC Address-Table Move Update Feature
Command or Action
Example:
Switch(conf-if)# switchport backup interface
gigabitethernet1/0/2 preemption mode forced
Step 5
switchport backup interface interface-id preemption
delay delay-time
Example:
Switch(conf-if)# switchport backup interface
gigabitethernet1/0/2 preemption delay 50
Step 6 end
Example:
Switch(conf-if)# end
Step 7 show interface [interface-id] switchport backup
Example:
Switch# show interface gigabitethernet1/0/2
switchport backup
Step 8 copy running-config startup config
Example:
Switch# copy running-config startup config
Related Topics
Flex Links, on page 374
Default Flex Links and MAC Address-Table Move Update Configuration, on page 379
Restrictions for Configuring Flex Links and MAC Address-Table Move Update, on page 373
Configuring Flex Links: Examples, on page 387
Flex Links Configuration, on page 375
Monitoring Flex Links, Multicast Fast Convergence, and MAC Address-Table Move Update, on page
386
Configuring Flex Links: Examples, on page 387

Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)

382
Purpose
• forced—(Optional) The active interface always preempts
the backup.
• bandwidth—(Optional) The interface with the higher
bandwidth always acts as the active interface.
• off—(Optional) No preemption occurs from active to
backup.
Configures the time delay until a port preempts another port.
Setting a delay time only works with forced and
Note
bandwidth modes.
Returns to privileged EXEC mode.
Verifies the configuration.
(Optional) Saves your entries in the switch startup configuration
file.