3750X strange behavior

notgoing2fail

I have a strange behavior for two 3750X's that I'd like to ask for anyone who has stacked these up.

First let me explain the setup and what works.

1) I have two switches. (Switch01 and Switch02)

2) Switch01 is set to master and Switch02 is slave.

Now, I know that the switches are properly stacked because the main console becomes the Switch01 console. Even when you jump on Switch02 console, it displays "Switch01#" on the console. The original MGMT IP address of Switch02 no longer works as that is now Switch01's MGMT IP address.

The strange behavior that I see is that on the main LED lights on the front panel, the MASTER LED correctly displays on SWITCH01.

But when I reboot Switch02 and it comes back up, it takes over the MASTER LED??? The light on Switch01 goes dim.

If I reboot Switch01, then it takes over the master led again.....why does this happen? Shouldn't the Master Led display on the switch in which I have manually set to as master? In this case Switch01....


On a side note, even when Switch02 takes over the Master LED, the main console is still Switch01, so nothing really changes from the logical unit point of view....


Thoughts anyone? I don't have access to these switches at the moment.....

Ryan82

Interesting. You could try running a couple debugs when you gain access:

• debug platform stack-manager sdp—Displays the Stack Discovery Protocol (SDP) debug messages.
• debug platform stack-manager ssm—Displays the stack state-machine debug messages.

Found a link that talks about stack creation and management:

Creation and Management of Catalyst 3750 Switch Stacks - Cisco Systems

HTH