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aaron_champion
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LACP Configuration for Distributed Switch - vSphere 5.5

I am attempting to set up Distributed Switch in a new lab but I have a question about how to properly configure the port LAGs.

If I have a collection of servers, each with two uplinks to a physical switch, how should I correctly configure the LACP LAGs? Do all ports on all servers become part of the same LAG, or should I be creating a different LAG for each new host?

For example:

Lets assume 16 servers. Do I create a single LAG on the DSwitch, mapping all 32 physical uplinks to the same LAG, then replicate that configuration on the physical switch? Or should I be creating 16 different lags, one for each pair of uplinks on each server host?

It seems odd to me that I would configure all servers on the same LAG, containing uplinks to different physical hosts.

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HeathReynolds
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Aaron, it sounds like you have it figured out. You can think of the LAG configuration on the distributed switch as a profile that get's applied to each host. The physical upstream switch is configured with a LAG for each host.

My sometimes relevant blog on data center networking and virtualization : http://www.heathreynolds.com

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vThinkBeyondVM
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Hi Friend,

  Plz refer below KB :

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=205182...

For more info on configuring DVS end-to-end, Plz ref below resources:

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=101055...

https://www.youtube.com/watch?v=a9tOtYow0HE

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aaron_champion
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Thanks for the response!

I had already read through these documents prior to posting the question. Videos like this have been helpful: https://www.youtube.com/watch?v=VRZJL5QDBCU but only show physical switch config for a single host. Due to lack of knowledge/experience, I'm having trouble visualizing the LACP configuration of the physical switch.

I'm trying different things in my test lab now to get a better understanding of how this all works. The LAG in vSphere seems to be just a template for any associated hosts, not an actual LAG (that part was confusing to me at first). I now believe that while I only have a single LAG created in the vSphere web client, I must still create multiple LAGs on the physical switch (one for each LAG on each host). My original mistake was assuming that I was to create a single LAG (containing all hosts) on the physical switch.

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HeathReynolds
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Aaron, it sounds like you have it figured out. You can think of the LAG configuration on the distributed switch as a profile that get's applied to each host. The physical upstream switch is configured with a LAG for each host.

My sometimes relevant blog on data center networking and virtualization : http://www.heathreynolds.com
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