Setup LAG between Cisco SGE and Catalyst Switch

[huwyhuwy123]

HI there,

I'm trying to setup a LAG between a cisco sge2010 and a catalyst 3750. However when I set it up the switches are throwing up a huge amount of "flapping" errors.

I've attached a doc that explains how this was setup. Can anyone explain what I've done wrong?

Cheers,

Al

[Tom Watts]

Hello, on the 3750, try to use the channel-group 1 mode on.

On the SGE2010 switch, create a static LAG without LACP.

Once you configure the channel groups you can make the interface type (trunk, access, etc) to match the traffic you want it to pass.

I recommend only to use manual lag on the 3750 connecting to any of the small business switches since the LAG configuration is quite limited comparing to the larger counterparts. If there is not an exact setting for both devices, the 3750 will loop the downstream switch.