Cisco Catalyst 2960 Series User Manual

PurposeCommand or Action
Example:
Switch(conf-if)# switchport backup interface
• forced—(Optional) The active interface always preempts
the backup.
• bandwidth—(Optional) The interface with the higher
bandwidth always acts as the active interface.
gigabitethernet1/0/2 preemption mode forced
• off—(Optional) No preemption occurs from active to
backup.
Configures the time delay until a port preempts another port.
switchport backup interface interface-id preemption
delay delay-time
Step 5
Setting a delay time only works with forced and
bandwidth modes.
Note
Example:
Switch(conf-if)# switchport backup interface
gigabitethernet1/0/2 preemption delay 50
Returns to privileged EXEC mode.end
Step 6
Example:
Switch(conf-if)# end
Verifies the configuration.
show interface [interface-id] switchport backup
Step 7
Example:
Switch# show interface gigabitethernet1/0/2
switchport backup
(Optional) Saves your entries in the switch startup configuration
file.
copy running-config startup config
Example:
Switch# copy running-config startup config
Step 8
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
How to Configure Flex Links and the MAC Address-Table Move Update Feature

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000