EtherChannel allows multiple physical Fast Ethernet or Gigabit Ethernet links to be combined into one logical channel.
| Operation | Command |
|---|---|
| switch#show etherchannel summary | |
| switch#show etherchannel protocol | |
| switch#show port group switch#show port channel switch#show port channel info switch#show etherchannel summary |
|
| switch# show interfaces port-channel NO |
D - down, P - in port-channel
Switch#show etherchannel summary
Flags: D - down P - in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
u - unsuitable for bundling
U - in use f - failed to allocate aggregator
d - default port
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel 　Protocol Ports
------+-------------+-----------+--------------------------
1 Po1(SU) LACP Fa0/1(P) Fa0/2(P)
(1)Physical Interface Switch1# conf t Switch1(config)# interface range FastEthernet 0/11 Switch1(config-if)# channel-group 1 mode on <- Create "Port-channel1" interface Switch1(config-if)# description test02-l2_12 Switch1(config-if)# interface range FastEthernet 0/12 Switch1(config-if)# channel-group 1 mode on <- Create "Port-channel1" interface Switch1(config-if)# description test02-l2_12 (2)Logical Interface Switch1(config)# interface port-channel 1 Switch1(config-if)# description test02-l2_11-12 Switch1(config-if)# switchport trunk encapsulation dot1q Switch1(config-if)# switchport mode trunk Switch1(config-if)# switchport trunk native vlan 555 Switch1(config-if)# switchport trunk allowed vlan 50,100,110,555
Switch# configure terminal Switch(config) # interface range gigabitethernet 1/0/1 , gigabitethernet2/0/1 Switch(config-if-range) # switchport trunk encapsulation dot1q Switch(config-if-range) # switchport mode trunk Switch(config-if-range) # channel-group 1 mode active
When adding a VLAN to EtherChannel, be sure to do it only for the port channel.
Don't add a VLAN to the physhical port.
If it is set to port channel, it will also be reflected on member port.
Switch1(config)# interface port-channel 1 Switch1(config-if)# switchport trunk allowed vlan add 93
Switch1(config)# interface port-channel 1 Switch1(config-if)# switchport trunk allowed vlan remove 93
Switch1(config)# interface gigabitethernet 1/1 Switch1(config-if)# shutdown Switch1(config-if)# no channel-group