Hey there!
This is a case about replacing a member switch of a stack.
Problem Description
Model: CE5810-48T4S-EI
Networking:
Configuration script:
Left:
stack member 1 domain 10
stack member 1 priority 150
interface 10GE1/0/1
port mode stack
stack-port 1/1
interface 10GE1/0/2
port mode stack
stack-port 1/1
Right:
interface 10GE2/0/1
port mode stack
stack-port 2/1
interface 10GE2/0/2
port mode stack
stack-port 2/1
Symptom: The standby switch in the stack is faulty and needs to be replaced with a new member switch. After the new member switch is configured with the stack function and connected to the master switch, the stack cannot be set up.
Handling Procedure
1. Check the stack configuration and cable connections. The configuration is correct.
2. During the test, the standby switch automatically restarts after the configuration is complete. After the restart, the configuration is lost and the stack cannot be set up.
3. The stack cables have been connected, shutdown the stack interface of the master switch. On the standby switch, save the configuration after the stack configuration is complete, and manually restart the switch. Then, open the stack interface of the master switch. After the standby switch restarts, the stack is set up successfully.
Root Cause
In the scenario, the stack cable is connected to the master switch before the stack is configured. During the configuration of the standby switch, the standby switch may detect that the stack conditions are met and initiate a stack. In this case, the standby switch automatically restarts but does not save the configuration. As a result, the configuration is lost after the restart, and the stack cannot be set up.
Solution
Before configuring the standby switch to set up a stack, shut down the stack port on the active switch. After the standby switch is configured, save the configuration, and restart. Then open the stack port to Up to complete the stack configuration.
I hope it is of help to you.
