- Make sure the redundant stack connection is in place and functional. All stack members should be connected in a logical ring.
- Preconfigure the new switches, if desired.
- Power off all new switches that will be joining the stack.
CAUTION:
If you cable one or more powered-on switches to the stack, the existing stack and the new switches assume two stacks are merging. They elect a single, new stack master, and you cannot specify which switch becomes the new master. All stack members assume configuration based on the new stack master. Stack members change their stack member numbers to the lowest available numbers.
- Install the new switches in the rack. This procedure assumes installation below the bottom-most switch, or above the top-most switch.
- Disconnect the redundant stack cable that connects the last switch in the stack back up to the first switch in the stack at the position in the ring where the new switch is to be inserted.
Note: If you want to merge an operational stack into the this stack, add the switches as a group by unplugging one stacking cable in the operational stack and physically connecting all unpowered units at that point.
- Connect this cable to the new switch, following the established order of stack-up to stack-down connections.
- Power up the new switches one by one. Verify, by monitoring the master switch console port, that the new switch joins the stack by issuing the show switch command. The new switch should join as a member (never as master; the existing master of the stack should not change).
- If the firmware version of the newly added member is not the same as the existing stack, update the firmware. For more information see the How do I upgrade the firmware on my managed switch?
For more information, see the following support articles:
- How do I remove a switch from a stack on my managed switch?
- How do I replace a stack member on my managed switch?
- What are stack members and how do they work with my managed switch?
This article applies to the following managed switches and their respective firmware:
- M5300 - firmware version 10.0.0.x
-
- M5300-28G (GSM7228S)
- M5300-5G (GSM7252S)
- M5300-28G3 (GSM7328Sv2h2)
- M5300-52G3 (GSM7352Sv2h2)
- M5300-28G_POE+ (GSM7228PSv1h2)
- M5300-52G-POE+ (GSM7252PSv1h2)
- M5300-28GF3 (GSM7328FSv2)
- XSM7224S - firmware version 9.0.1.x
Last Updated:07/07/2025
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Article ID: 21902