The Journey of a Network Engineer

Dec 26 2010   3:45AM GMT

How to aggregate ports?

Sulaiman Syed Profile: Sulaiman Syed

In many cases we would require higher bandwidth within the organization while we have 1GB uplinks, or we stack switches and want to have multiple uplinks from each switch, or just to keep redundant link that is unblocked by STP. All these are simple scenarios that we face and the solution is rather simple.

Port Aggregation is the answer. Cisco calls it Etherchannel. Before configuring etherchannel, the ports taking part in this channel should have the following unified:
1-Speed
2-Duplex
3-Spanning tree settings
4-access in same vlan
5-if trunk, then native vlan should be same. and should pass the same vlans.
6-all ports should belong to the same ether channel group.

There are besically two protocols to negotiate portchannels, LACP and PAgP. I would prefer to just turn the channel on without negotiating.

sample configuration
switch(config)# int range gig 0/1 – 4
switch(config-if)# channel-group 1 on

do the same configuration at the other side.

 Comment on this Post

 
There was an error processing your information. Please try again later.
Thanks. We'll let you know when a new response is added.
Send me notifications when other members comment.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to: