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Nate
Asked: 2011-07-27 10:54:07 +0800 CST

Link Aggregation between DELL PC2724 and Cisco Catalyst 3750

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I'm trying to configure Link Aggregation between my two switches, on the DELL switch, there is only an option to include a port in a "LAG Group." On the Cisco's I've tried creating an EtherChannel group with "Dynamic Desirable" (set to negotiate). I have also tried to setup the ports as 802.11Q as well as ISL Link (both with same results)

When I plug in the cables, I can see that the links come up for each individual port, but the trunk does not.

I can see the status of each individual "port" on the Cisco as well as the EtherChannel group from the Cisco and each of the individual ports show status "stand-alone."

The lights on the Cisco switches start orange (normal) and eventually go to green, but I cannot get any traffic across the cross-connect. If I remove all "configuration" and use a single cable, everything works fine. I'm trying to get some additional speed with the LAG.

Any thoughts on what I should try?

cisco dell switch lacp lag

1 Answers

  1. http://accessories.dell.com/sna/PopupProductDetail.aspx?sku=P2741NP says that it supports LACP, so that's what we should try go with. I would set the config on the cisco:

    int g1/1
channel-group 1 mode active

    and then int-portchannel 1 and set your trunking there - but let's get the LACP working first.

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