Specifications

CHAPTER 2

VLAN Implementation

Link Aggregation Control Protocol (LACP) is an IEEE standard protocol, IEEE 802.3ad, which does the same thing.

LACP modes follow:

n On: The port channels without using LACP negotiation. The port on the other side must also be set to On.

n Active: Port actively negotiates channeling with the port on the other end of the link. A channel forms if the other

side is Passive or Active.

n Passive: Responds to LACP messages but does not initiate them. A channel forms only if the other end is set to

Active.

If you want to use LACP, specify it under the interface and put the interface in either active or passive mode:

(config-if)# channel-protocol lacp

(config-if)

channel-group number mode

{

active

passive

}

Verifying an EtherChannel

Some typical commands for verifying include the following:

# show running-config interface

number

# show interfaces

number

etherchannel

# show etherchannel

number

port-channel

# show etherchannel summary

# show etherchannel load-balance

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CCNP SWITCH 642-813 Quick Reference by Denise Donohue

9781587140112.qxd 11/23/09 11:34 AM Page 26