Changing the Stack ID of S5700

During network planning, to facilitate management, it is recommended that stack IDs of switches from top to bottom be configured in descending order. This document describes how to change the stack IDs of stack members to ensure that these stack IDs are configured in descending order.

After changing the stack IDs, you need to restart the switches to make the changes take effect, which will interrupt services. To minimize the impact on services, restart the switches in a specified period.

In Figure 1-1, the stack IDs of stack members are 3, 1, and 2 from top to bottom. These stack IDs need to be planned again based on the location to facilitate device management.

Figure 1-1 Networking diagram

View information about the stack members.

<Stack> display stack
Stack mode: Service-port                                                       
Stack topology type: Ring                                                        
Stack system MAC: 0018-82b1-6eb4                                                 
MAC switch delay time: 10 min                                                     
Stack reserved VLAN: 4093                                                        
Slot of the active management port: 3 
Slot Role        MAC address       Priority Device type 
------------------------------------------------------------- 
 3 Master      0018-82b1-6eb4 200          S5720-28X-LI-AC 
 1 Standby     0018-82b1-6eba 150          S5720-28X-LI-AC 
 2 Slave       0018-82b1-6ebb 150          S5720-28X-LI-AC

The stack IDs of stack members need to be changed. After the change, check whether the changes are correct based on the MAC addresses of the switches.

• Change the stack ID from slot 3 to slot 1.
• Change the stack ID from slot 1 to slot 2.
• Change the stack ID from slot 2 to slot 3.

1. Shut down the uplink and downlink ports of the stack to isolate the stack from the network.

   <Stack> system-view 
   [Stack] interface gigabitethernet 3/0/8 
   [Stack-GigabitEthernet3/0/8] shutdown 
   [Stack-GigabitEthernet3/0/8] quit 
   [Stack] interface gigabitethernet 1/0/9 
   [Stack-GigabitEthernet1/0/9] shutdown 
   [Stack-GigabitEthernet1/0/9] quit 
   [Stack] interface gigabitethernet 2/0/5 
   [Stack-GigabitEthernet2/0/5] shutdown 
   [Stack-GigabitEthernet2/0/5] quit 
   [Stack] interface gigabitethernet 3/0/6 
   [Stack-GigabitEthernet3/0/6] shutdown 
   [Stack-GigabitEthernet3/0/6] quit

2. After the stack IDs are changed, the configurations of the interfaces with the original stack IDs will be lost. Therefore, you need to perform the same configurations on the new interfaces before changing the stack IDs.

   For example: The configurations of the interfaces with the original stack IDs are as follows:

   # 
   interface GigabitEthernet3/0/6 
    description ToPC                                                                                                                    
    port link-type access                                                                                                               
    port default vlan 10 
   # 
   interface GigabitEthernet3/0/8 
    eth-trunk 10 
   # 
   interface GigabitEthernet1/0/9 
    eth-trunk 10 
   # 
   interface GigabitEthernet2/0/5 
    description ToIPPhone-01                                                                                                                    
    port link-type access                                                                                                               
    port default vlan 20 
   #     

   Change the configurations of these interfaces to the configurations of the interfaces with the new stack IDs.

   [Stack] interface gigabitethernet 1/0/6  // Correspond to GE3/0/6. 
   [Stack-GigabitEthernet1/0/6] description ToPC 
   [Stack-GigabitEthernet1/0/6] port link-type access 
   [Stack-GigabitEthernet1/0/6] port default vlan 10 
   [Stack-GigabitEthernet1/0/6] quit 
   [Stack] interface gigabitethernet 1/0/8  // Correspond to GE3/0/8. 
   [Stack-GigabitEthernet1/0/8] eth-trunk 10 
   [Stack-GigabitEthernet1/0/8] quit 
   [Stack] interface gigabitethernet 2/0/9  // Correspond to GE1/0/9. 
   [Stack-GigabitEthernet2/0/9] eth-trunk 10 
   [Stack-GigabitEthernet2/0/9] quit 
   [Stack] interface gigabitethernet 3/0/5  // Correspond to GE2/0/5. 
   [Stack-GigabitEthernet3/0/5] description ToIPPhone-01 
   [Stack-GigabitEthernet3/0/5] port link-type access 
   [Stack-GigabitEthernet3/0/5] port default vlan 20 
   [Stack-GigabitEthernet3/0/5] quit

3. Change the stack IDs, save the configurations, and restart the switches.

   [Stack] stack slot 3 renumber 1 
   Info: The assigned slot ID already exists in the stack system.  
   Warning: All the configurations related to the slot ID will be lost after the slot ID is modified. 
   Do not frequently modify the slot ID because it will make the stack split. Continue? [Y/N]:y  
   Info: Stack configuration has been changed, and the device needs to restart to make the configuration effective. 
   [Stack] stack slot 1 renumber 2 
   Info: The assigned slot ID already exists in the stack system.  
   Warning: All the configurations related to the slot ID will be lost after the slot ID is modified. 
   Do not frequently modify the slot ID because it will make the stack split. Continue? [Y/N]:y  
   Info: Stack configuration has been changed, and the device needs to restart to make the configuration effective. 
   [Stack] stack slot 2 renumber 3 
   Info: The assigned slot ID already exists in the stack system.  
   Warning: All the configurations related to the slot ID will be lost after the slot ID is modified.
   Do not frequently modify the slot ID because it will make the stack split. Continue? [Y/N]:y 
   Info: Stack configuration has been changed, and the device needs to restart to make the configuration effective. 
   [Stack] quit 
   <Stack> save 
   The current configuration will be written to flash:/vrpcfg.zip. 
   Are you sure to continue?[Y/N]y   
   Now saving the current configuration to the slot 3.........    
   Save the configuration successfully.              
   Now saving the current configuration to the slot 1. 
   Save the configuration successfully.       
   Now saving the current configuration to the slot 2. 
   Save the configuration successfully.                  
   <Stack> reboot 
   Info: The system is now comparing the configuration, please wait...................  
   Info: If want to reboot with saving diagnostic information, input 'N' and then execute 'reboot save diagnostic-information'. 
   System will reboot! Continue?[Y/N]:y

4. After the restart is complete, check whether the stack status, stack IDs, and interface configurations are correct. If the configurations on the interfaces are incorrect, reconfigure the interfaces.

   <Stack> display stack
   Stack mode: Service-port                                                       
   Stack topology type: Ring                                                        
   Stack system MAC: 0018-82b1-6eb4                                                 
   MAC switch delay time: 10 min                                                     
   Stack reserved VLAN: 4093                                                        
   Slot of the active management port: 1 
   Slot    Role        MAC address       Priority   Device type 
   ------------------------------------------------------------- 
       1   Master      0018-82b1-6eb4    200        S5720-28X-LI-AC 
       2   Standby     0018-82b1-6eba    150        S5720-28X-LI-AC 
       3   Slave       0018-82b1-6ebb    150        S5720-28X-LI-AC

5. If the configurations are correct, enable the uplink and downlink ports of the stack.

   <Stack> system-view 
   [Stack] interface gigabitethernet 1/0/8 
   [Stack-GigabitEthernet1/0/8] undo shutdown 
   [Stack-GigabitEthernet1/0/8] quit 
   [Stack] interface gigabitethernet 2/0/9 
   [Stack-GigabitEthernet2/0/9] undo shutdown 
   [Stack-GigabitEthernet2/0/9] quit 
   [Stack] interface gigabitethernet 3/0/5 
   [Stack-GigabitEthernet3/0/5] undo shutdown 
   [Stack-GigabitEthernet3/0/5] quit 
   [Stack] interface gigabitethernet 1/0/6 
   [Stack-GigabitEthernet1/0/6] undo shutdown 
   [Stack-GigabitEthernet1/0/6] quit

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