configure verify and troubleshoot LACP (Link Aggregation or Ether Channel)

Posted: March 19, 2017 in CCNA
Tags: , , ,

In this tutorial we will Learn  how to  configure verify and troubleshoot LACP (Link Aggregation or Ether Channel). Actually Link Aggregation or Ether Channel is a technology very similar to PAgP which allows two or more than two physical ports to combine and provide a new third single logical port which results in high availability and increased bandwidth. In below topology diagram you can see two switches switch0 and switch1 having ports fa0/1 and fa0/2.Using LACP we can bind these two ports to form a single logical port.

You can also Read:

Configure Ether Channel Manually.
Configuer Ether Channel using PAgP.

lacp

 

STEP 1:Configure LACP on Switch0

 

Switch>enable

Switch#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)#host switch0

switch0(config)#interface range fa0/1-2

switch0(config-if-range)#channel-group 1 mode active
switch0(config-if-range)#channel-protocol lacp

 

 

STEP 2:Configure LACP on Switch1
Switch>enable

Switch#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)#host switch1

switch1(config)#int range fa0/1-2

switch1(config-if-range)#channel-group 1 mode active

switch1(config-if-range)#channel-protocol lacp
STEP 3:Verify LACP Configuration on cisco switch.
switch0#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 - in use f - failed to allocate aggregator

u - unsuitable for bundling

w - waiting to be aggregated

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)
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