Do the Cisco SG 300-28P Switches support Etherchannel?

[Giovanni Ceci]

Hey Everyone,

Just a real simple question. Does anyone know if the Cisco SG 300-28P Small Business Switches support Etherchannel?

Thanks,

neocec

[Eric Moyers · Accepted solution]

Yes sir, Etherchannels or LAGs (Link Aggregation Groups) are supported

Two types of LAGs are supported:

•

Static—A LAG is static if the LACP (Link Aggregation Control Protocol) is

disabled. You configure a static LAG with a group of ports that are always

active members of the LAG.

•

Dynamic—A LAG is dynamic if it is LACP-enabled. You define a group of

ports as candidate ports of a dynamic LAG. The LACP determines which

candidate ports from the LAG are active member ports. The non-active

member ports are standby ports ready to replace any failing active member

ports

Hope this helps, please let us know if you have further questions.

Eric Moyers
Cisco SBSC Network Engineer
1-866-606-1866

[Giovanni Ceci]

That answers my question perfectly!! Thank you!

neocec

[Tom Watts]

Robert0979,

Each LAG can consist of a maximum of 8 physical interface per static  LAG and no more than 16 ports can be candidate for dynamic lag. While the switch supports a maximum of 8 LAGS.

[roberto979]

Hello,

As long as you have less than 8 aggregate groups, can all ports on the SG300s be configured in aggregation mode?

Thanks,

R979

[sumtommy123]

Dear,

I have question as above topices.

Does you know SG 300 52 port Gigi switch and 2960S can link with together as ether-channel ?

As I know, each of hardware can support that feature, but if link with together as ether-channel is quite difficult.

Waiting for your advice.

Many thanks,

Tommy

[Tom Watts]

Hi Tommy Sum,

The answer is yes.  You need to be careful when making the channel connections however. Make sure to run the exact same commands otherwise spanning-tree will loop the switch and likely crash the SG 300.

A simple channel-group mode on command on both switch will work fine.  Do not mess with any LACP setting. Also notice, if you're having issues with the SG 300 getting loops it may be because of the auto edge port.

If you do a show spanning-tree active, check to see if port fast negotiated on the links within the channel group. If it has, you need to go to the interfaces and do a no spanning-tree portfast.

This should resolve any problems.