cancel
Showing results for 
Search instead for 
Did you mean: 

Adding 3rd switch to stack

Adding 3rd switch to stack

Gaurav_Madan
New Contributor
HI All

I have a LIVE network having 2 switches already stacked as follows :

#show stacking
Stack Topology is a Ring
Active Topology is a Ring
Node MAC Address Slot Stack State Role Flags
------------------ ---- ----------- ------- ---
*00:04:96:35:e5:0b 1 Active Master CA-
00:04:96:51:fd:60 2 Active Backup CA-

I need to add a 3rd switch to this stack in a maintenance window

1) I have made sure that version is compatible
2) I have made sure license level is compatible.

Is the following process fine ? Need some confirmation :
***************************************************************
1) Power down new switch and cable it up in the stack.
2) Power the new switch back up.
3) On the existing stack verify the new switch is being seen by the current stack
(The command below will display the new switches MAC and show that stacking is disabled):
show stacking

4) On the existing stack, type the following commands:
a. configure stacking node-address slot 3
b. synchronize stacking node-address
c. enable stacking node-address
d. reboot node-address

Question # 1 : If above steps are true ; does this mean we will not power down the existing switch stack (slot 1 and 2 ) ?
Question # 2 : If above steps are true ; does that mean that existing config (1:1 -> 1:50 and 2:1 ->2:50) will remain intact and we will additionally see
ports number 3:1 ->3:50 ?
Question # 3 : Hence does that mean that we will be able to do everything through console plugged in existing master switch (slot 1 console in my case) ?

Please guide on the steps to be followed as we will have limited time to do this activity

7 REPLIES 7

Ron_Huygens
Community Manager Community Manager
Community Manager
Then you are good with the guidelines above

Gaurav_Madan
New Contributor
These are X450a-48t

Ron_Huygens
Community Manager Community Manager
Community Manager
Hi Gaurav,

It depend on the model, but in general the answer to all of your questions is yes.
If this is a summit X670v you need to enable stacking support on the new node first.
GTM-P2G8KFN