Adding an additional switch and making it a stack.

[John Peterson]

I currently have Cisco 3750G which is currently live and active and fully populated and only have remote access.

I have an additional same switch which I would like to stack. My initial plans were to have 2 GIbit etherchannels, but I came across the option to Stacks both switch with each other.

When I do a show switch on the live switch its set as a Member:

Switch/Stack Mac Address : 081f.f30f.1c80

                                          H/W   Current

Switch#  Role   Mac Address     Priority Version  State

----------------------------------------------------------

*1       Master 081f.f30f.1c80     1      0       Ready

When I do a show switch on my new switch this is the output shown:

Switch/Stack Mac Address : d824.bd89.9800

                                           H/W   Current

Switch#  Role   Mac Address     Priority Version  State

----------------------------------------------------------

1       Member 0000.0000.0000     0      0       Provisioned

*2       Master d824.bd89.9800     1      0       Ready

I would like to add the new switch to the stack without losing the config for the switch which is live.

I understand that the highest priority of the switches becomes the Master but as the live switch is Priority 1, would chancing this affect the switches config, or would it lose connection at all?

Also when I plug in the new switch and it reboot how do I ensure it becomes the slave without rebooting the live switch?

The cables on the switch do they have to go to port1 on the live switch and port 1 on the new switch or can they be port 1 and port 2?

Thank you.

[davy.timmermans]

Switches with different major Cisco IOS software versions usually have different stack protocol versions. Switches with different major version numbers are incompatible and cannot exist in the same switch stack.

A downgrade of the new switch is needed

HTH

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[John Peterson]

Thanks,

I am about to install the switch, the live switch has a default command which says something along the lines of switch 1 provision ws-3560g-ts etc...

The problem is that before I sent the switch to be installed by the enginner, I changed the switch number to 2, there the switch to be stacked is showing itself as number 2, would this affect the switch 1 provision ws-2560g-ts command to the live switch?

[Leo Laohoo]

I am about to install the switch, the live switch has a default command which says something along the lines of switch 1 provision ws-3560g-ts etc...

I hope this is a type-o.  A 2560G/3560G?

[John Peterson]

The switch is a 3560 which has Gigibit ports.

Do I need to change the switch 1 provision... to switch 2 provision on the live switch, as I've changed switch to be stacked to switch 2?

[Leo Laohoo]

3560 do NOT support stacking.

3560 will support an ancient form of "stacking" called switch clustering.