Cisco IE 3000 User Manual

19-10
Cisco IE 3000 Switch Software Configuration Guide
OL-13018-01
Chapter 19 Configuring Flex Links and the MAC Address-Table Move Update Feature
Configuring Flex Links and the MAC Address-Table Move Update
To remove a preemption scheme, use the no switchport backup interface interface-id preemption
mode interface configuration command. To reset the delay time to the default, use the no switchport
backup interface interface-id preemption delay interface configuration command.
This example shows how to configure the preemption mode as forced for a backup interface pair and to
verify the configuration:
Switch# configure terminal
Switch(conf)# interface gigabitethernet1/1
Switch(conf-if)#switchport backup interface gigabitethernet1/2 preemption mode forced
Switch(conf-if)#switchport backup interface gigabitethernet1/2 preemption delay 50
Switch(conf-if)# end
Switch# show interfaces switchport backup detail
Active Interface Backup Interface State
------------------------------------------------------------------------
GigabitEthernet1/1 GigabitEthernet1/2 Active Up/Backup Standby
Interface Pair : Gi1/1, Gi1/2
Preemption Mode : forced
Preemption Delay : 50 seconds
Bandwidth : 100000 Kbit (Gi1/1), 100000 Kbit (Gi1/2)
Mac Address Move Update Vlan : auto
Step 3
switchport backup interface interface-id Configure a physical Layer 2 interface (or port channel)
as part of a Flex Links pair with the interface. When one
link is forwarding traffic, the other interface is in standby
mode.
Step 4
switchport backup interface interface-id preemption
mode [forced | bandwidth | off]
Configure a preemption mechanism and delay for a Flex
Link interface pair. You can configure the preemption as:
• Forced—the active interface always preempts the
backup.
• Bandwidth—the interface with the higher bandwidth
always acts as the active interface.
• Off—no preemption happens from active to backup.
Step 5
switchport backup interface interface-id preemption
delay delay-time
Configure the time delay until a port preempts another
port.
Note Setting a delay time only works with forced and
bandwidth modes.
Step 6
end Return to privileged EXEC mode.
Step 7
show interfaces [interface-id] switchport backup Verify the configuration.
Step 8
copy running-config startup config (Optional) Save your entries in the switch startup
configuration file.
Command Purpose

Cisco IE 3000 Specifications

General

Operating Temperature	-40 to 75°C (-40 to 167°F)
DRAM	128 MB
Flash Memory	32 MB
Uplink Ports	2 x 10/100/1000Base-T or SFP
MAC Address Table Size	8000
Mounting	DIN rail, Wall