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Add switch to stack
Posted on 2013-01-02
I currently have a stack of 3 3750 switches and I am going to add 2 more to the stack. Because of some spacing and cabling limitations the switches wont be added below the bottom switch now.
It will go from this
1
2
3
to this
1
new switch
2
3
new switch
1) is it possible to add the new switches in without causing downtime to the users connected to the original 3 switches? This will be done after hours regardless i just want an idea what to expect.
2) I assume after they are all up I can just renumber them so the switch number corresponds to its logical position using the switch xx renumber yy command?
It will go from this
1
2
3
to this
1
new switch
2
3
new switch
1) is it possible to add the new switches in without causing downtime to the users connected to the original 3 switches? This will be done after hours regardless i just want an idea what to expect.
2) I assume after they are all up I can just renumber them so the switch number corresponds to its logical position using the switch xx renumber yy command?
[X]
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3 Comments
Active 4 days ago
Hi,
I advise to put the new switch:
new switch
1
2
3
new switch
or:
1
2
3
new switch
new switch
In this case, you able to connect all devices without stack dropping...
On all new devices please use same IOS with stack master
Before you add new devices you need to fix the stack prioroty:
If the newest devices booted up you able to configure it..
I advise to put the new switch:
new switch
1
2
3
new switch
or:
1
2
3
new switch
new switch
In this case, you able to connect all devices without stack dropping...
On all new devices please use same IOS with stack master
Before you add new devices you need to fix the stack prioroty:
show switch detail
Current
Switch# Role Mac Address Priority State
--------------------------------------------------------
*1 Master 0014.f2bc.6b00 15 Ready
2 Member 0019.e888.2600 10 Ready
5 Member 0016.4773.3780 1 Ready
If the newest devices booted up you able to configure it..
As long as the existing 3 switches stay connected to each other with the stack cables, you can add additional switches anywhere in the stack loop without shutting anything down. You will end up with a goofy config because the order of the switches when it comes to port numbering won't match the physical position. Make sure the code on the new switches is an exact match prior to adding them in to the stack.
After everything is in place, you could schedule an outage, renumber the switches, reboot, and then apply the config with corrected port numbers to make everything line up again. Just make sure the config has been saved at least once with the new switches running and stack members otherwise they could take over as master and wipe the config.
After everything is in place, you could schedule an outage, renumber the switches, reboot, and then apply the config with corrected port numbers to make everything line up again. Just make sure the config has been saved at least once with the new switches running and stack members otherwise they could take over as master and wipe the config.
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