GEC - odd and even number of ports ?

e-chuah · ‎07-22-2007

Hi..

Must i use even number of GE ports (2,4,6 etc) when bundling them to form a GEC. If i bundle 3 GE ports together, will i get 3Gbps bandwidth ? Or GEC only works when grouping even number of ports together ?

Thanks

Eng Wee

Jon Marshall · ‎07-22-2007

Hi Eng

No you don;t have to use even numbers of ports. If you group 3 gigbit ports together with etherchannel then you should get 3 Gbps throughput although there may be other restrictions on the switch/module that don't allow the full 3Gbps.

HTH

Jon

Amit Singh · ‎07-22-2007

Eng,

I agree with Jon on this. I really doesnot matter using odd or even ports for GEC, you can use either of the ports and the aggregate bandwidth will be equal to the ports used in the budle subjected to the switch/module restrictions.

HTH,

-amit singh

e-chuah · ‎07-23-2007

Hi guys,

Thanks for the reply. I did a further search in CCO documents as well, what both of u said is true.

Deepak Kumar · ‎07-11-2018

Hi @Amit Singh

I went through the CVD (August 2013) and on page number 31, Cisco clearly mentioned that

"Configure two or more physical interfaces to be members of the EtherChannel. It is recommended that they are
added in multiples of two."

What is your opinion?

Regards,

Deepak Kumar

Regards,
Deepak Kumar,
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