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3750X etherchannel with different capacity interfaces

johnramz
Beginner
Beginner

Image: C3750e-ipbasek9-mz.122-58.SE2.bin"

Two stacks of 4 switches each

Each stack has one module : C3KX-NM-10GT

So I could create a 20--GBit erherchannel. But what If I want to create a 22-Gbit etherchannel?

Could I use the Two(2) 10-Gbit interfaces on each stack plus Two(2) 1-Gbit interfaces on EACH stack ?

Is this doable? Does fall out of best practices?

If yes please provide CISCO document that supports it.

Thanks

Juan

9 Replies 9

Leo Laohoo
VIP Community Legend VIP Community Legend
VIP Community Legend
But what If I want to create a 22-Gbit etherchannel?

Won't work.  Not unless you've manage to find two 11 Gbps ports.

Most important rule-of-thumb with Etherchannels:  Each physical interface need to be the same speed.

Thanks Leo. I figured that was the answer "All LAN ports in each EtherChannel must be the same speed, and you must configure all the ports as either Layer 2 or Layer 3 LAN ports." according to the link provided by Ankur.

We currently have a 2-GB etherchannel between those two stacks. so what I might do is to set up a new 20-GB etherchannel and let STP take care of keeping the 2-GB link in passive mode.

Juan

Ankur Arora
Beginner
Beginner

Hi,

You won't be able to create a 22Gig etherchannel using two 10gig ports and two 1gig ports.

As all the interfaces in an etherchannel should have the exact same speed.

You may go through the below document:

http://www.cisco.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4.html#catalyst

Thanks

Ankur

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