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Huawei S-Series Switch Stacking Demonstration

Time: 2024-06-19
        Switch stacking combines multiple switches into a single logical device for unified data forwarding, which expands port quantity, simplifies network deployment, enhances reliability, and improves system processing capacity and bandwidth. Moduletek Laboratory demonstrates the specific configuration and performance of switch stacking using Huawei S-Series switches as an example.
Pre-Stacking Preparation
        Before stacking, confirm two key points: whether the target switches support stacking, and the stacking capability of stacking cards/service ports (refer to official switch configuration and commissioning documents).
Service Port Stacking Support of S6700-EI Devices
Figure 1 Service Port Stacking Support of S6700-EI Devices
        This test uses two identical Huawei S-Series switches for stacking (a maximum of 9 switches can be stacked). Table 1 details the switches and stacking cables used.
Table 1 Device and Cable Information
  Item   Description
  Switch B Model   S6700-24-EI
  Switch A System Version   5.150 (S6700 V200R005C00SPC500)
  Switch B Model   S6700-24-EI
  Switch B System Version   5.130 (S6700 V200R003C00SPC300)
  Huawei Specialized Stacking Cables   SFP-10G-CU0M5 02311VGK
  Huawei high-speed cable   SFP-10G-CU3M 02310MUP
Stacking Configuration Steps
        Before stacking, the two switches logically and physically belong to independent devices, and you need to connect the serial port to log in to the device for configuration respectively.
Table 2 Stacking Configuration
Item Configure Switch A Configure Switch B
Stack Port Configuration
Enter the logical port and add physical ports as stacking ports. If ports 1 and 8 are selected, ports 1~8 will all become physical stacking member ports and cannot be used as ordinary service ports.
Enter the logical port and add physical ports as stacking ports. If ports 2 and 7 are selected, ports 1~8 will all become physical stacking member ports and cannot be used as ordinary service ports.
Priority Configuration
Set the priority to 200 (default: 100) to facilitate being elected as the master switch; modify the switch slot number to distinguish the two switches.
Keep the default priority (100); modify the switch slot number to distinguish the two switches.
Save and Restart
Save the current configuration, connect the stacking cables, and restart the switch.
Save the current configuration, connect the stacking cables, and restart the switch.

Stacking Operation & Verification
        1. Master/Standby Election: Switch A completes restart first and is elected as the master switch. During Switch B’s restart, its system automatically updates and synchronizes to Switch A’s version, and Switch B becomes the standby switch.
        2. Stacking Link Status: After restart, the stacked ports connected by cables are LINK UP, enabling stacking connection. Removing either cable will not affect the stack—dual cables are used to prevent stacking failure due to a single cable fault, improving reliability.
Connection of Stack Member Switches
Figure 2 Connection of Stack Member Switches
        3. Stacking Success Verification:
        • Enter system view and run the command:
            display stack
        • The output will list both S6700 switches, indicating successful stacking.
        • After successful stacking, connect to any switch via the console port to manage all stacked switches. Run the command:
            display interface brief
        • The output shows that the stacked switches are logically integrated, with all ports displayed uniformly.
Additional Test: Stack Re-Establishment
        Remove the two stacking cables to physically disconnect the stack. Connect Moduletek 10G DAC cables to the stacking ports, and the stack can be re-established successfully.
Stacking with Moduletek 10G DAC Cables
Figure 3 Stacking with Moduletek 10G DAC Cables
        For more details, refer to the official document: S Series Switches Stack Deployment Best Practices.
        Moduletek’s 10G DAC cables are fully compatible with Huawei switch stacking. Welcome to inquire and purchase.
        For further inquiries about the above content, please contact us at: sales@moduletek.com
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