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August 16th, 2023 13:42
Replacement of an M8024-K stack member that used to be the Stack Manager creates two Management Units in the stack.
We had an M8024-K fail switch. Unfortunately this switch was the stack manager. The manager mode moved to the another switch as expected and the LAGs continued to work. So far so good.
Now, when I insert a replacement switch with a blank config and the same FW version (5.1.10), the switch receives its config from the existing switch pair as expected.
But the newly inserted switch then assumes that it should be the management unit and attempts to act as such. Unfortunately the existing management switch continues to also be the management unit. The result is best described as a bit of a mess.
I am missing a trick somewhere.
How can I stop the newly inserted switch from attempting to become the management unit - or to allow the switch to assume the management role and also have the current management unit switch to be a stack member at the same time?
DELL-Young E
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August 17th, 2023 02:27
Hello thanks for choosing Dell.
"How can I stop the newly inserted switch from attempting to become the management unit - or to allow the switch to assume the management role and also have the current management unit switch to be a stack member at the same time?"
Ans: As per Stacking mechanism which is working as expected and the current management switch become member switch when you reboot the current mgmt switch, otherwise leave it as it is and we cannot stop or configure newly inserted switch as a member.
Hope this helps.
Simon_Edwards
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August 17th, 2023 11:11
@DELL-Young E Thanks.
So to paraphrase:
1) The new switch (Switch A) insertion is acting as expected and attempting to beome Manager is normal.
2) I should wait until the newly inserted Switch A goes active and then power cycle the current Manager (Switch B) to allow the remaning third switch (Switch C) to work with the newly inserted switch as the new stack manager,
3) Once the Switch B power cycle completes it will asume a member role and the stack will be whole again.
Do I have this sequence right?
(edited)