Troubleshooting a mismatched stack-ID
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This stack example has two members and two more members that were strictly provisioned, following the initial install deterministic method.
Displaying a stack with 3 unjoined switches
switch# show stack Stack ID : 00031cc1-de4d87c0 MAC Address : 1cc1de-4dc765 Stack Topology : Chain Stack Status : Active Uptime : 0d 0h 2m Software Version : WB.15.11.0000x Mbr ID Mac Address Model Pri Status --- ----------- ------------------------------------- --- ----------- 1 1cc1de-4d87c0 HPE J9727A 2920-24G-PoE+-2SFP+ Switch 200 Standby 2 1cc1de-4dc740 HPE J9729A 2920-24G-PoE+-2SFP+ Switch 128 Commander 3 1cc1de-4dbd40 HPE J9726A 2920-24G-2SFP+ Switch 128 Not Joined 4 1cc1de-4d79c0 HPE J9728A 2920-48G-4SFP+ Switch 175 Not Joined
When powering on switch #:3, it does not join the stack.
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The stack ports for the new switch appear online, but the
show stacking
command shows that the switch has not been recognized.switch# show logging -r -s I 10/02/00 00:46:56 02558 chassis: ST1-STBY: Stack port 3 is now on-line. I 10/02/00 00:46:56 02558 chassis: ST2-CMDR: Stack port 2 is now on-line.
Displaying the switch is not recognizedswitch(config)# show stacking stack-ports member 1,2 Member 1 Member Stacking Port State Peer Member Peer Port ------ -------------- ----- ------------- ------- 1 1 Down 0 0 1 2 Up 2 1 1 3 Down 0 0 1 4 Down 0 0 Member 2 Member Stacking Port State Peer Member Peer Port ------ -------------- ----- ------------- ------- 2 1 Up 1 2 2 2 Up 0 0 2 3 Down 0 0 2 4 Down 0 0
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The
show stacking
command does not show that the member is “Not Joined.”A log file indicates that a “topo /hello” was seen from a switch that was not part of the current stack ID. The console of the switch that should have been member 3 shows the following example output.
Output from the “not joined” switchswitch# show stacking Stack ID : 00011cc1-de4dbd40 MAC Address : 1cc1de-4dbd64 Stack Topology : Unknown Stack Status : Active Uptime : 0d 0h 1m Software Version : WB.15.11.0000x Mbr ID Mac Address Model Pri Status --- ------------- --------------------------------- --- ------------------- 1 1cc1de-4dbd40 HPE J9726A 2920-24G-2SFP+ Switch 128 Commander
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The output is different if you have an inactive fragment, since this switch can have the configuration from an old stack. In this case, it might be inactive and show ‘missing’ switches from the old configuration. The stack-id value does not match the stack ID of the Stack 2920 stacking factory reset.
switch# stacking factory-reset Configuration will be deleted and device rebooted,continue [y/n]? Y
To join this switch to the other stack, execute the
stacking factory-reset
command to erase all of the stale stacking configuration information. This command automatically reboots the switch and on its subsequent boot, the switch is able to join the new stack.