cisco 3750 stack issue

[sridhar ch]

Hi,

I have a strange issue with my cisco 3750 stack. I have a cisco ASA 5540 pair connected to both swicthes in stack (primary to switch1 and secondary to switch2) and this is stack is connected to by core switches. One of the switch has a strange issue as it is the ports are not coming up. when i execute the command "sh switch", i can see only switch2.

3750stack#sh switch stack-ports

  Switch #    Port 1       Port 2

  --------    ------       ------

    2          Down          Ok

rebooted master couple of times with no luck and finally changed the stack cable connected to port1 of swicth2, but no luck. But to our surprise, it got detected after an hour but the roles got changed. 

3750stack#sh switch
Current
Switch# Role Mac Address Priority State
--------------------------------------------------------
1  Member 001c.b06d.3b80 15     Ready
*2 Master 001c.b131.b880    1      Ready

how can i make the switch with highest priority as master?

thanks,

Sridhar

[ukhan0001]

Dear SRIDHAR CH,

First of all you have to check the stack ports connectivity.

STEP 1: "Switch1" stack port 1 should be connected with the "Switch2" stack port 2 and Switch 1 stack port 2 should be connected to the switch 2 stack port 1.

STEP 2: After that you have to set the Master and Member priority. The highest priority should be set for Master switch and lower for the Member, 

COMMANDS

"Enable"

"configure terminal"  

"switch 1 priority 9" so it will become a Member because its priority is smaller.

"switch 2 priority 10" so it will become a Master because its priority is greater.

then renumber the switches 

 "switch 2 renumber 1"

" switch 1 renumber 2"

Note: once you renumber the switch you must have to allocate the numbers for all the switches in the stack.

then execute the following commands

"wr" to save config.

"reload" to restart.

hope it will help you.