Troubleshooting a strictly provisioned, mismatched MAC address

Cause

When switches are strictly provisioned, it is possible to enter an incorrect type or incorrect MAC address. If this occurs, the switch does not match the intended configuration entry and stacking attempts to add this switch as a new “plug-and-go” switch. If the stacking configuration already has 10 switches, then the “plug-and-go” fails.

The following example shows a stack with 9 members. There is a new JL319A switch that is supposed to be member 4; however, the MAC address was mis-typed, therefore, there is an “opening” for a plug-and-go at member 10. It will join as member 10.

Action
  1. This shows the stack before boot.

    Viewing a stack with 9 members 

    switch(config)# show stack

Stack ID         : 02009418-82d83c40                                           
          
MAC Address      : 941882-d83c49    
Stack Topology   : Chain                                   
Stack Status     : Active                                  
Split Policy     : One-Fragment-Up 
Uptime           : 0d 14h 27m  
Software Version : WC.16.04.0000x


 Mbr                                                                            
 ID  Mac Address       Model                                 Pri Status         
 --- ----------------- ------------------------------------- --- ---------------
 *1  941882-d83c40     Aruba JL321A 2930M-48G Switch         150 Commander      
  2  9cdc71-f576c0     Aruba JL324A 2930M-24SR-PoE+ Switch   128 Member         
  3  941882-d91a40     Aruba JL319A 2930M-24G Switch         128 Standby        
  4  9cdc71-f2bbc6     Aruba JL324A 2930M-24SR-PoE+ Switch   128 Not Joined     
  5  941882-d9a240     Aruba JL321A 2930M-48G Switch         128 Not Joined     
  6  941882-d9e900     Aruba JL319A 2930M-24G Switch         128 Not Joined     
  7  9cdc71-f8f480     Aruba JL323A 2930M-40G-8SR-PoE+ Sw... 128 Not Joined     
  8  941882-da0f40     Aruba JL319A 2930M-24G Switch         128 Not Joined     
  9  9cdc71-f8d400     Aruba JL323A 2930M-40G-8SR-PoE+ Sw... 128 Not Joined
  2. This shows that, after booting, the switch is joined as member 10.

    Viewing a member joining the stack 

    switch(config)# show stack

Stack ID         : 02009418-82d83c40                                           
          
MAC Address      : 941882-d83c49    
Stack Topology   : Chain                                   
Stack Status     : Active                                  
Split Policy     : One-Fragment-Up 
Uptime           : 0d 14h 44m  
Software Version : WC.16.04.0000x

Mbr                                                                            
 ID  Mac Address       Model                                 Pri Status         
 --- ----------------- ------------------------------------- --- ---------------
 *1  941882-d83c40     Aruba JL321A 2930M-48G Switch         150 Commander      
  2  9cdc71-f576c0     Aruba JL324A 2930M-24SR-PoE+ Switch   128 Member         
  3  941882-d91a40     Aruba JL319A 2930M-24G Switch         128 Standby        
  4  9cdc71-f2bbc6     Aruba JL324A 2930M-24SR-PoE+ Switch   128 Not Joined     
  5  941882-d9a240     Aruba JL321A 2930M-48G Switch         128 Not Joined     
  6  941882-d9e900     Aruba JL319A 2930M-24G Switch         128 Not Joined     
  7  9cdc71-f8f480     Aruba JL323A 2930M-40G-8SR-PoE+ Sw... 128 Not Joined     
  8  941882-da0f40     Aruba JL319A 2930M-24G Switch         128 Not Joined     
  9  9cdc71-f8d400     Aruba JL323A 2930M-40G-8SR-PoE+ Sw... 128 Not Joined     
  10 9cdc71-f54940     Aruba JL324A 2930M-24SR-PoE+ Switch   128 Member

    To correct this issue:

    1. Write down the correct MAC address.

    2. Remove the member that was added using plug-and-go with the strictly provisioned, mismatched MAC address as shown in the following example.

    3. Update the strictly provisioned entry with the correct MAC address.

    4. Boot the switch.

    Removing a member and updating the entry with a MAC address 
    switch(config)# stacking member 10 remove 
The specified stack member will be removed from the stack and 
its configuration will be erased. The resulting configuration 
will be saved. The stack member will be shutdown. Continue [y/n]? y

Aruba-Stack-2930M(config)# stacking member 4 type JL324A mac-address 9cdc71-f2bbc0
This will save the current configuration. Continue [y/n]?  y
  3. This shows that member 4 has joined the stack.

    Viewing that member 4 joined the stack 

    switch(config)# show stack

Stack ID         : 02009418-82d83c40                                           
          
MAC Address      : 941882-d83c49    
Stack Topology   : Chain                                   
Stack Status     : Active                                  
Split Policy     : One-Fragment-Up 
Uptime           : 0d 14h 50m  
Software Version : WC.16.04.0000x

Mbr                                                                            
 ID  Mac Address       Model                                 Pri Status         
 --- ----------------- ------------------------------------- --- ---------------
 *1  941882-d83c40     Aruba JL321A 2930M-48G Switch         150 Commander      
  2  9cdc71-f576c0     Aruba JL324A 2930M-24SR-PoE+ Switch   128 Member         
  3  941882-d91a40     Aruba JL319A 2930M-24G Switch         128 Standby        
  4  9cdc71-f2bbc6     Aruba JL324A 2930M-24SR-PoE+ Switch   128 Not Joined     
  5  941882-d9a240     Aruba JL321A 2930M-48G Switch         128 Not Joined     
  6  941882-d9e900     Aruba JL319A 2930M-24G Switch         128 Not Joined     
  7  9cdc71-f8f480     Aruba JL323A 2930M-40G-8SR-PoE+ Sw... 128 Not Joined     
  8  941882-da0f40     Aruba JL319A 2930M-24G Switch         128 Not Joined     
  9  9cdc71-f8d400     Aruba JL323A 2930M-40G-8SR-PoE+ Sw... 128 Not Joined
  
boot member 4 
  
  
switch(config)# show stack

Stack ID         : 02009418-82d83c40                                           
          
MAC Address      : 941882-d83c49    
Stack Topology   : Chain                                   
Stack Status     : Active                                  
Split Policy     : One-Fragment-Up 
Uptime           : 0d 14h 50m  
Software Version : WC.16.04.0000x

Mbr                                                                            
 ID  Mac Address       Model                                 Pri Status         
 --- ----------------- ------------------------------------- --- ---------------
 *1  941882-d83c40     Aruba JL321A 2930M-48G Switch         150 Commander      
  2  9cdc71-f576c0     Aruba JL324A 2930M-24SR-PoE+ Switch   128 Member         
  3  941882-d91a40     Aruba JL319A 2930M-24G Switch         128 Standby        
  4  9cdc71-f2bbc0     Aruba JL324A 2930M-24SR-PoE+ Switch   128 Member     
  5  941882-d9a240     Aruba JL321A 2930M-48G Switch         128 Not Joined     
  6  941882-d9e900     Aruba JL319A 2930M-24G Switch         128 Not Joined     
  7  9cdc71-f8f480     Aruba JL323A 2930M-40G-8SR-PoE+ Sw... 128 Not Joined     
  8  941882-da0f40     Aruba JL319A 2930M-24G Switch         128 Not Joined     
  9  9cdc71-f8d400     Aruba JL323A 2930M-40G-8SR-PoE+ Sw... 128 Not Joined