Here you can find some configuration examples for the Cisco Flexlink.
This example shows how to configure an interface with a backup interface and to verify the configuration:
Switch# configure terminal Switch(conf)# interface fastethernet1/1 Switch(conf-if)# switchport backup interface fastethernet1/2 Switch(conf-if)# end Switch# show interface switchport backup Switch Backup Interface Pairs: Active Interface Backup Interface State ------------------------------------------------------------------------ FastEthernet1/1 FastEthernet1/2 Active Up/Backup Standby FastEthernet1/3 FastEthernet1/4 Active Up/Backup Standby Port-channel1 GigabitEthernet1/1 Active Up/Backup Standby
This example shows how to configure preemption mode as bandwidth for a backup interface pair and to verify the configuration:
Switch# configure terminal Switch(conf)# interface gigabitethernet1/0/1 Switch(conf-if)# switchport backup interface gigabitethernet1/2 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 interface switchport backup detail Active Interface Backup Interface State ------------------------------------------------------------------------ GigabitEthernet1/21 GigabitEthernet1/2 Active Down/Backup Down Interface Pair : Gi1/21, Gi1/2 Preemption Mode : forced Preemption Delay : 50 seconds Bandwidth : 10000 Kbit (Gi1/1), 10000 Kbit (Gi1/2) Mac Address Move Update Vlan : auto
To configure VLAN load balancing on Flex Links, follow these steps:
In this example, VLANs 1 to 50, 60, and 100 to 120 are configured on the switch:
Switch(config)# interface fastethernet 1/6 Switch(config-if)# switchport backup interface fastethernet 1/0/8 prefer vlan 60,100-120
When both interfaces are up, Fast Ethernet port1/0/8 forwards traffic for VLANs 60 and 100 to 120 and Fast Ethernet port 1/0/6 forwards traffic for VLANs 1 to 50
Switch# show interfaces switchport backup Switch Backup Interface Pairs: Active Interface Backup Interface State ------------------------------------------------------------------------ FastEthernet1/6 FastEthernet1/8 Active Up/Backup Standby Vlans Preferred on Active Interface: 1-50 Vlans Preferred on Backup Interface: 60, 100-120