4000 Router Series Layer 3 - IP Services Configuration Guide

269

Configuring flow classification

The following matrix shows the feature and router compatibility:

Feature MSR2000 MSR3000 MSR4000

Flow classification No Yes Yes

To implement differentiated services, flow classification categorizes packets to be forwarded by a

multi-core device according to one of the following flow classification policies:

• Flow-based policy—Forwards packets of a flow to the same CPU. A data flow is defined by using

the following fields: source IP address, destination IP address, source port number, destination port

number, and protocol number. This policy takes the first-in first-out rule.

• Packet-based policy—Forwards packets in sequence to different CPUs, even though they are the

same flow. This policy does not ensure packet order.

Specifying a flow classification policy

IMPORTANT:

If a service requires the packets of a flow must be received by the same CPU, use the flow-based policy.

To specify a flow classification policy:

Step Command Remarks

1. Enter system view.

system-view N/A

2. Specify a flow classification

policy.

forwarding policy { per-flow |

per-packet }

By default, the flow-based policy is

used.