Changing the Stack ID

Networking Requirements

In Figure 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 Networking diagram

Check information about the stack members with the stack IDs.

<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 need to be changed according to the following rules: After the change, check whether the change is correct based on the MAC addresses of the devices.

Slot 3 → Slot 1
Slot 1 → Slot 2
Slot 2 → Slot 3

To change the stack IDs, you need to restart the devices, which interrupts services. Therefore, perform this operation in a specified period.

Procedure

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

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

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

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

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