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How to use Huawei switch stacked optical ports

Huawei switch stacked optical ports can be used to connect multiple switches into a single logical stack by configuring service ports as stack ports and linking them with dedicated stack cables.Overview of Optical Port Stacking

Huawei S-Series switches support stacking using either stack cards or service ports. When using optical ports (service ports) for stacking:

  • No stack card is required, but dedicated stack cables must be purchased separately .
  • Service ports must be manually configured as stack ports before connecting the switches .
  • Optical stacking allows multiple switches to operate as a single logical device, simplifying management, enabling a single IP for the stack, and supporting cross-device link aggregation .
Pre-Stacking Preparation
  1. Verify Compatibility: Ensure your switch models support service port stacking (e.g., S5700, S6700 series) and check the maximum number of stackable switches .
  2. Select Ports and Cables: Choose supported optical ports and dedicated stack cables based on the distance between switches .
  3. Firmware and Licenses: Ensure all switches run the same VRP version and enable stacking licenses if required .
  4. Topology Planning: Use a ring topology for redundancy; avoid a simple chain to prevent single points of failure .
Configuration Steps
  1. Access the Switch CLI: Connect via console or SSH to each switch.
  2. Enter System View: Use system-view to configure the switch.
  3. Configure Stack Ports: Assign the optical ports as stack ports. For example, if using ports 1 and 8:

    stack-port group 1[Switch-stack-port] port GigabitEthernet0/0/1 to GigabitEthernet0/0/4 This converts the selected ports into physical stack ports .

  4. Set Switch Priority and Slot ID: Assign a priority to influence master election and set a unique slot number for each switch:

    stack priority 200 stack slot 1 Avoid frequent slot ID changes to prevent stack split .

  5. Connect Stack Cables: Link the configured optical stack ports between switches according to the planned topology.
  6. Verify Stack Status: Use display stack to check member status, master/standby roles, and connectivity.
Best Practices
  • Use bidirectional links for redundancy in ring topology .
  • Prioritize dedicated stack ports over regular uplink ports to avoid service disruption .
  • Synchronize configurations via the master switch and back up all switches using save all .
  • Monitor stack health: Check for offline members, mismatched firmware, or cable issues regularly .
  • Avoid overloading stack bandwidth: Allocate high-speed optical ports for stacking to ensure smooth synchronization .
Troubleshooting Common Issues
  • Offline Members: Check physical connections, replace faulty cables, and verify VRP versions .
  • Multiple Masters Detected: Adjust priorities and ensure proper ring integrity .
  • Configuration Inconsistencies: Always configure via the master switch to prevent conflicts . By following these steps and best practices, Huawei switch stacked optical ports can be effectively used to create a reliable, high-performance stack that simplifies network management and enhances redundancy.
How to use Huawei switch stacked optical ports

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