05-07-2009 04:12 AM - edited 03-06-2019 05:35 AM
Hi,
I have a stack of Catalyst 3750. I want to add another Catalyst 3750 (Same IOS) to the stack. when I connect the switch to the stack, will this interrup the current users connected to the stack? Is there any steps I need to do before connecting the switch to the stack?
Thanks in advance.
05-07-2009 04:27 AM
Hello Serge,
you can use the following document as a reference
I would do it during a maintanance window.
There is the possibility to provision the new switch and you need also to use priorities to be sure of what switch is the master in the stack.
Hope to help
Giuseppe
05-07-2009 05:12 AM
I added a 3750 to a stack yesterday. If your existing 3750 hasn't had any "switch" priority commands entered, it will become the master. You'll need to make sure that the existing switch gets the stack cable connected to port 1, and port 2 on the new 3750. I didn't notice any downtime, but as always, I would suggest doing it during it after hours.
You will have to go in and set specific port commands, such as cdp, portfast, vlan, switchport modes, etc.
I think the master is supposed to copy its IOS image over to the new member if the member does not have the correct IOS. I have not tried it that way though. I always make sure the new member has the correct image ahead of time.
05-07-2009 05:34 AM
On the primary switch do the following:
Switch(config)#switch 1 priority 15
Switch(config)#switch 1 provision
Switch#show switch
Switch/Stack Mac Address : 0019.0680.e980
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master 0019.0680.e980 15 0 Ready
That will make sure the current master is prepared.
To add the second switch to the stack:
Switch(config)#switch 2 provision
You may now configure all the ports for the new switch.
Rack the new switch, connect the stacking cables, and power on.
You can optionally set second switch priority for failover once it is on and powered on.
Switch(config)#switch 2 priority 14
HTH,
Bret
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: