Cisco IE-3000-8TC Command Reference Manual page 400

show interfaces
This is an example of output from the show interfaces switchport backup command. In this example,
VLANs 1 to 50, 60, and 100 to 120 are configured on the switch:
Switch(config)#interface gigabitEthernet 1/1
Switch(config-if)#switchport backup interface gigabitEthernet 1/2 prefer vlan 60,100-120
When both interfaces are up, Gi1/2 forwards traffic for VLANs 60, 100 to 120, and Gi1/1 forwards traffic
for VLANs 1 to 50.
Switch#show interfaces switchport backup
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
GigabitEthernet1/1 GigabitEthernet1/2 Active Down/Backup Up
Vlans on Interface Gi 1/1: 1-50
Vlans on Interface Gi 1/2: 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 Gi1/1 goes down, Gi1/2 carries
all VLANs of the Flex Link pair.
Switch#show interfaces switchport backup
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
GigabitEthernet1/1 GigabitEthernet1/2 Active Down/Backup Up
Vlans on Interface Gi 1/1:
Vlans on Interface Gi 1/2: 1-50, 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 Gi1/1 comes up, then VLANs preferred on this interface are blocked on the peer interface Gi1/2
and forwarded on Gi1/1.
Switch#show interfaces switchport backup
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
GigabitEthernet1/1 GigabitEthernet1/2 Active Down/Backup Up
Vlans on Interface Gi 1/1: 1-50
Vlans on Interface Gi 1/2: 60, 100-120
This is an example of output from the show interfaces interface-id pruning command:
Switch# show interfaces gigibitethernet1/2 pruning
Port
This is an example of output from the show interfaces interface-id trunk command. It displays trunking
information for the port.
Switch# show interfaces gigabitethernet1/1 trunk
Port
Gi0/1
Port
Cisco IE 3000 Switch Command Reference
2-374
Fa1/3 Fa1/5
Po1 Po2
Backup Interface
Backup Interface
Backup Interface
Vlans pruned for lack of request by neighbor
Mode Encapsulation
auto negotiate
Vlans allowed on trunk
Chapter 2 IE 3000 Switch Cisco IOS Commands
Active Down/Backup Up
Active Standby/Backup Up
State
State
State
Status Native vlan
trunking 1
OL-13019-01