Why Verify Stack Establishment?

If the stack is not established correctly, the switches may continue operating independently. This can lead to:

• Inconsistent configurations
• Network loops
• Service interruptions
• Failure of redundancy mechanisms
• Increased management complexity

Therefore, checking the stack status is an essential step during deployment and troubleshooting.

Typical Service Port Stack Connections

Huawei switches support stack establishment through service ports by converting high-speed interfaces into stack ports. Common interfaces include:

• 10GE SFP+ ports
• 25GE ports
• 40GE QSFP+ ports
• 100GE QSFP28 ports

The physical topology is usually configured as:

• Chain topology
• Ring topology

Ring topology is generally preferred because it provides better redundancy and higher reliability.

So how to check stack status on Huawei switches when the stack is built through service port connections? Let’s get started.

Step 1: Check Physical Port Status

First, confirm that the service ports used for stacking are physically Up.

Run the following command:

display interface brief

Check whether the stack-related interfaces show the status as UP.

Example:

10GE1/0/49   up   up
10GE1/0/50   up   up

If the interfaces remain Down, possible causes include:

• Incorrect fiber or cable connection
• Optical module mismatch
• Unsupported cable type
• Interface not added to the stack port

Step 2: Verify Stack Port Configuration

Use the following command to check stack port information:

display stack port

Example output:

Stack Port Information:
--------------------------------------------------------
Stack-Port1:
Oper Status: Up
Port Status:
10GE1/0/49    Up
10GE1/0/50    Up

Stack-Port2:
Oper Status: Up
Port Status:
10GE2/0/49    Up
10GE2/0/50    Up

Key points to verify:

• Stack port status should display Up
• Member interfaces should also display Up
• All configured stack links should appear in the output

If the stack port status is Down, the logical stack connection has not been established successfully.

Step 3: Check Stack Topology and Member Status

Run the following command:

display stack

Example:

Stack topology type : Ring
Stack system MAC: 5489-9876-1234
Stack member number: 2

--------------------------------------------------------
MemberID Role     MAC Address      Priority DeviceType
1        Master   5489-9876-1111   150      S6730-H
2        Standby  5489-9876-2222   120      S6730-H

This command confirms several important details:

• Whether multiple switches have joined the stack
• Which switch is the Master
• Which switch is the Standby or Slave
• Whether the topology is Chain or Ring

If only one member appears, the stack has not formed correctly.

Step 4: Check Stack Synchronization Status

To verify whether configuration synchronization is functioning normally, use:

display stack configuration

You can also check for alarms or synchronization failures in the log buffer:

display logbuffer

Look for stack-related events such as:

• Stack link Up/Down
• Master election success
• Stack merge detection
• Configuration synchronization completion

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Common Causes of Stack Establishment Failure

Several issues can prevent Huawei switches from forming a stack through service ports:

• Incorrect stack ID configuration
• Different software versions between switches
• Service ports not converted into stack ports
• Incorrect port numbering
• Faulty optical modules or DAC cables
• Unsupported topology design

In practice, software version mismatch is one of the most common causes. Always ensure all switches run compatible firmware versions before deployment.

Conclusion

Checking whether a Huawei switch stack has been established through service port connections involves more than verifying physical cabling. Administrators should confirm interface status, stack port status, topology information, and synchronization results using commands such as display stack, display stack port, and display interface brief.

A properly established stack ensures simplified management, higher availability, and stable network operation, making stack verification an important part of every Huawei switch deployment.

If you need help, feel free to reach out at supports@thunder-link.com.