Unanswered Question
Feb 2nd, 2009

We have a bunch of serverfarm switches connected to our core switch (Cat6500s).We also setup port-channel as "on"mode between them. we did not setup any load-balance policy for our environment. I think it would follow up default policy (source-mac).

Right now, there are several new servers to connect our serverfarm switches. They need be configured LACP mode. I also setup port channel as "passive"mode. I have to change policy as source-ip. My question is:

a. Could it cause any spanning tree loop or flapping if I setup new port-channel as LACP?

b. If i change load-balance policy as "sour-ip", would it cause any issue with existing environment? BTW, we treat our serverfarm switch as Layer2 switch, do we need setup policy as source-ip?

Thanks a lot!

I have this problem too.
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glen.grant Mon, 02/02/2009 - 16:09

No it won't cause a loop . It shouldn't cause a problem changing the load balance option either. Which side did you set as passive mode ? The other side has to be active mode then to have the channel come active.


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