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Author Topic: Adding switch to existing stack question.  (Read 3948 times)

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Offline wkusyk

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Adding switch to existing stack question.
« on: January 12, 2015, 09:29:25 AM »
Hi All,

Have an existing switch stack of two Avaya 5698-TFD-PWR switches and I want to add third switch to the stack.
What is the best way of doing this?
Thanks for any help in advance.

Cheers,
WK


Offline Telair

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Re: Adding switch to existing stack question.
« Reply #1 on: January 12, 2015, 12:55:42 PM »
It's really easy.  I find it best if you pre-update the switch software to the exact same level at the other units in the stack first.  So, I would...

1) Update new unit to match software in existing stack.

2) Make sure the "Base" switch is off on the new unit.

3) Install new unit 3 below unit 2.

3) Disconnect the return stacking cable from unit 2 back to unit 1.

4) Connect stacking cable from unit 2 to unit 3 and then run the return stacking cable from unit 3 back to unit 1.

5) Power-on unit 3 and make sure it joins the stack (assuming the other units were already running while you were doing this).

6) Dance.

You can then program the VLAN's and such on the new unit through your normal management interface.

Offline SoNix

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Re: Adding switch to existing stack question.
« Reply #2 on: January 14, 2015, 07:28:03 AM »
Hummm, just a quick question about this procedure.

If, i currently have only one switch, and i want to convert it to a stack.

1. Does the "Base" button has a "live" action, (or i need to shutdown, the (New will be base), turn on the base button, boot the switch, and after the switch is booted, connect the second one ?
    Can i convert a "Single switch" to a Stack Live ? (only activating the base button).
    (And don't forget to set the new "ip switch stack" before doing this " :)


Thanx! :)

Offline Telair

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Re: Adding switch to existing stack question.
« Reply #3 on: January 14, 2015, 01:51:47 PM »
If you need to change the base setting, I believe it requires the unit to be shutdown and turned back on to take effect.  But as long as unit #1 has the base switch set to on, you can add additional units to it while it is running and there should be no problem.  I prefer to shut it all down, add the extra units and then power it back on all at once, but I have added unit to an existing switch when it's running many times.  But yes.  When going from a single unit to a stack, set the stack IP before adding the switches or else you could loose connectivity to the management address.

Offline CptnBlues63

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Re: Adding switch to existing stack question.
« Reply #4 on: January 15, 2015, 10:49:10 AM »
If you need to change the base setting, I believe it requires the unit to be shutdown and turned back on to take effect.  But as long as unit #1 has the base switch set to on, you can add additional units to it while it is running and there should be no problem.  I prefer to shut it all down, add the extra units and then power it back on all at once, but I have added unit to an existing switch when it's running many times.  But yes.  When going from a single unit to a stack, set the stack IP before adding the switches or else you could loose connectivity to the management address.

Yes, it requires a reboot for the switch that's been set to "base" to actually become the base. 

I rack and connect (cascade cables) the new switch(es), then change the base's switch to "base" and then pull the plug on it.  I then quickly plug everything in and wait for it to boot and voila, a stack is born!  lol

This way the downtime isn't much more than a reboot.

I always have a laptop connected via console cable to unit 1 and change the IP to "stack" after the reboot.  I don't know that it matters, it's just my preference.

Adding switch(es) to an existing stack is always simpler as there is no downtime.