ESM Spanning tree Question

[chieftan999]

Hi all,

I should probably have asked this question with my other.

Anyway, hopefully it will be the last question.

As far as I am aware, both the ESMs in a BladeCenter are treated as seperate entities by the Blade Center. In other words, one is active and if that goes down then the other becomes active. If this is the case, and I install the ESMs but do not change the default of the Spanning tree on the ESM (leave it at 32785 or whatever the default is) then will the ESM become the root bridge or not?

I dont think it will but would like confirmation, as if I install this BladeCenter in a live layer 2 environment and the ESMs cause a convergence of the layer 2 spanning tree, then the network will fail.

Thanks in advance

 

[JMurrah]

We've got our IBM blade chassis connected up to a Cisco 3750 switch, then to a 6509 core. The 3750 is supposed to be the spanning tree root. The first ESM we fired up took over root, and jacked everything up. Our network guys went in and setup the 3750 to be root, and everything was good. Sorry I don't know exactly what they did, upped the value probably.

But to answer your question, in our experience yes, the ESM did take root.

 

[chieftan999]

Okay. Thanks for the information.