Configuring Hash Factors (VPLS or Bridged Forwarding Scenarios)

Configuration Guide

In VS mode, this configuration process is supported only by the admin VS.

• l2: indicates that hash factors are <source MAC, destination MAC>
• l3: indicates that hash factors are <source IP, destination IP>
• l4: indicates that hash factors are <source IP, destination IP, source port-number, destination port number, protocol number>
• label-ip: indicates that hash factors are the MPLS labels. This means that the hash calculation is performed based on labels encapsulated into non-IP packets

Suitable Scenarios

The command is used in bridged forwarding scenarios, or in the ingress PE in VPLS scenarios. In these scenarios:

• IP carrying TCP/UDP packets: the default hash factors are <source IP, destination IP, source port-number, destination port number, protocol number>.
• IP carrying non-TCP/non-UDP packets: the default hash factors are <source IP, destination IP>.
• Non-IP packets: the default hash factors are <source MAC, destination MAC>

If the hash factors <source MAC, destination MAC> are hashable enough, try the l3 parameter. If the hash factors <source IP, destination IP> are hashable enough, try the l4 parameter.

Follow-up Procedure

If this command is configured but traffic load balancing cannot be performed well, you can try to modify hash-arithmetic. For detailed information, see Configuring Hash-arithmetic.

Run the save command to save the current configuration to the configuration file when a set of configuration is finished and the expected functions have been achieved.