Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

I'm currently having difficulty determining the best way to connect a Dlink DGS-3420-52T switch stack to a IBM B50G switch stack.

I have two IBM B50G switches stacked together, which then connect to our firewall and then out to the internet.

I have 5 D'Link xStack DGS-3420 series switches stacked together in a ring topology. What is the best way to connect these 5 D'Link DGS-3420 series switches to the IBM B50G stack?

Is LACP (Link Aggregation Control Protocol) going to be my best best?

How do I spread the uplink ports across the D'Link stack?

Is trying to connect these two separate stacks together a bad idea in the first place?

Any help at all would be really appreciated.

share|improve this question
possible duplicate of Configuring LACP across a IBM B50G switch stack –  Falcon Momot Feb 25 at 9:35

1 Answer 1

I guess your only choice here is LACP, make some port channels between the switches in a way that makes sense in your topology, take consideration of the amount of traffic has to flow trough each of them and avoid creating bottlenecks.

share|improve this answer
Thanks a lot for the quick response. As I understand switch stacking, the entire stack is seen as 1 large switch. If I wanted to use LACP I would have to create a lag that spans 8-10 ports on each stack. 8-10 physical Ethernet cables between the two stacks. Is LACP capable of aggregating 8-10 1 Gigabit cat5e cables spanned across both the Dlink stack and the IBM Stack? –  user130336 Apr 10 '13 at 21:51
That depends on the switches, I don't have the specs of them right now but it should not pose any problem –  Martino Dino Apr 11 '13 at 1:15

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.