Catalyst 2960-S stacking question

Unanswered Question
Apr 12th, 2012

Good Morning. I followed the 3-switch Redundant stacking diagram and now when I boot up the stack Switch 2 is acutally Member 3 and Switch 3 is Member 2.

We plan on having Port-Channels spanning across Switch 1 - Master and Switch 2 (Member 3) of identical port types. Switch 3 (Member 2) is going to have 2 10GIG port channel created.

Is there going to be a problem renumbering the stack as they physically sit or should I just configure the devices based on thier logical member numbers.

I don't understand why the stack connection is Switch 1 - 1 ----> Switch 2 -1

                                                                    Switch 2 - 2 ----> Switch 3- 1

                                                                    Switch 3 - 2 ----> Switch 1 - 2

Any thoughts is greatly appreciated

I have this problem too.
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robwils Thu, 04/19/2012 - 03:56

Try the command: switch x renumber y

Where x is the current switch number and y is the number you want it to be.

HTH

D_Shofkom33x Thu, 04/19/2012 - 12:21

I understand that you can renumber the switches I was just concerned with the redundancy since we are using multiple port channels. It's just strange that the physical stack arrangment does not line up with the logical stack arrangement when following the 3-switch redundant stack configuration.

Leo Laohoo Thu, 04/19/2012 - 16:59
Good Morning. I followed the 3-switch Redundant stacking diagram and now when I boot up the stack Switch 2 is acutally Member 3 and Switch 3 is Member 2.

There's a few reasons for this.

Firstly, the switch numbering is based on the MAC address.  If one powers up the stack simulatenously and for the first time the switch election takes place.  The stack master is based on the lowest MAC address.

So as what Rob has mentioned, do "switch N renumber NN" and power down;.  Make sure the switches you want to renumber are not stacked.

So if you want them stacked to the right order, here's how you do it:

1.  Power down the stack members;

2.  Attach the stack cables;

3.  Power up the stack members ONE AT A TIME and IN THE ORDER OF YOUR CHOOSING.

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Posted April 12, 2012 at 8:55 AM
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