How to create Etherchanel between two switches?

How to create etherchannel between two switches?

First, lets see what mode each protocol supports:

PAgP	LACP	Notes:
On	On	All ports channeling, no negotiation packets send
Auto	Passive	Waits to channel until asked
Desirable	Active	Actively asks to form a channel

Switch1:

1.       Add two interfaces, Fa0/3 and Fa0/4 to the etherchannel on Switch1:

Switch1#config t

Switch1(config)#interface range Fa0/3 – 4

2.       Choose protocol:

Switch1(config-if-range)# channel-protocol LACP

3.       Choose group and mode based on the protocol, see above table:

Switch1(config-if-range)#channel-group 1 mode active

Creating a port-channel interface Port-channel 1

Switch2:

1.       Add two interfaces, Fa0/3 and Fa0/4 to the etherchannel on Switch2:

Switch2#config t

Switch2(config)#interface range Fa0/3 – 4

2.       Choose protocol:

Switch2(config-if-range)# channel-protocol LACP

3.       Choose group and mode based on the protocol, see above table:

Switch1(config-if-range)#channel-group 1 mode passive (make sure mode is not Active)

Creating a port-channel interface Port-channel 1

Here are some basic commands to check the etherchannel status:

show etherchannel summary   shows etherchannel status on each member port

show etherchannel port             shows etherchannel status on each member port

show etherchannel detail          shows detailed status of each component

show <pagp|lacp> neighbor     shows Etherchannel neighbor on each port