Huawei OLT uplink port connected to core switch

To connect a Huawei OLT uplink port to a core switch, configure the physical SFP or Ethernet uplink, assign the appropriate VLAN, and optionally use link aggregation for higher bandwidth and redundancy.

Physical Connection

Huawei OLTs, such as the MA5608T or MA5683T, typically provide SFP or Ethernet uplink ports for connecting to a core switch . Use fiber optics with SFP modules for high-speed uplinks or Ethernet adapters if fiber is not available. Ensure the uplink port on the OLT is directly connected to the corresponding port on the core switch, maintaining the same interface type and speed .

VLAN Configuration

The uplink port should be assigned a default VLAN that matches the service VLAN on the core switch. By default, Huawei OLT uplink ports use VLAN 1, but you can configure a specific VLAN using the port uplink default vlan command . This ensures that traffic from ONUs or other OLT-connected devices is correctly tagged and forwarded through the core network. For multiple services, configure the uplink to allow tagged VLANs as needed.

Link Aggregation (Optional)

For higher bandwidth and redundancy, you can configure link aggregation on the OLT uplink port. Huawei supports both manual Eth-Trunk and LACP modes . In manual mode, you must create an Eth-Trunk and add member interfaces on both the OLT and the core switch. Ensure that all member interfaces have the same speed, duplex, and flow control settings. LACP mode allows dynamic negotiation of aggregated links, improving reliability and load balancing.

Management and IP Connectivity

Before connecting the uplink to the core switch, configure the management IP on the OLT (e.g., 192.168.20.70/24) and verify connectivity via ping or Telnet/SSH . The management port (ETH or meth0) is separate from the uplink port and is used for administrative access. Avoid loops in the network, as they can cause the uplink port to shut down and disrupt OLT management connectivity .

Best Practices

• Use matching VLANs on both OLT and core switch uplink ports.
• Consider link aggregation for high-traffic environments.
• Verify IP connectivity and management access before enabling production traffic.
• Ensure redundancy with multiple uplinks if supported.
• Avoid network loops to prevent automatic uplink shutdown.

By following these steps, the Huawei OLT uplink port can be reliably connected to a core switch, supporting both management and subscriber traffic efficiently.