(Optional) Configuring Flow Label-based Load Balancing
After flow label-based load balancing is configured for an L2VPN, L2VPN services can be classified by flow labels and forwarding paths can be selected based on the flow labels, improving forwarding efficiency.
Prerequisites
Before configuring flow label-based load balancing, complete the following task:
- Enable MPLS L2VPN.
Context
On an L2VPN carrying service traffic, when multiple links exist between Ps, flow label-based load balancing can be configured on PEs to improve traffic forwarding efficiency and reduce the forwarding pressure on the Ps. After this function is configured, the PEs can add flow labels to different types of traffic to distinguish one from another. When a P receives packets carrying flow labels, the P selects paths based on the flow labels to forward the packets, implementing load balancing.
Procedure
- Run system-view
The system view is displayed.
- Run vsi vsi-name
The VSI view is displayed.
- Run pwsignal bgp
The VSI-BGP view is displayed.
- Run flow-label { both | send | receive } [ static ]
Flow label-based load balancing is enabled for the VSI.
- Flow label-based load balancing can be successfully configured if one of the following conditions is met:
- The receive parameter is configured on the local end, and the send parameter is configured on the remote end.
- The send parameter is configured on the local end, and the receive parameter is configured on the remote end.
- The both parameter is configured on both ends.
If the static parameter is configured, the static flow label-based load balancing mode is enabled.
In this mode, if the two ends have inconsistent configurations, packets carrying flow labels are discarded, causing traffic loss.
- Run commit
The configuration is committed.