Traffic Policing Issue

Hello everyone,

I got one issue when I test traffic policing on Huawei S12704.

My scenario: (check Policing Issue attachment).

- PC1 sends out traffic at a high rate (1Gbps). (using iperf tool)

- SW1 & SW2 applies traffic policing at 15Mbps on the link between SW1 & SW2 (Outbound direction).

My issue:

In the beginning, when PC1 starts to send traffic to PC2, SW1 will receive traffic with full bandwidth and it applies traffic policing (limit traffic at 15Mbps) on an outgoing interface (XG2/2/0/32). But the peak rate on the outgoing interface is higher than 15Mbps. (Check Output_Peak_Rate attachment)

Configuration on SW1:

traffic policy BES2_LIMIT match-order config
 classifier TEST_C behavior CAR_15M
traffic classifier TEST_C operator or precedence 30
 if-match acl 3051
traffic behavior CAR_15M
 permit
 car cir 15360 pir 15360 cbs 2887680 pbs 2887680 mode color-blind green pass yellow pass red discard
 statistic enable
acl number 3051
 rule 5 permit ip source 10.92.92.0 0.0.0.255 dscp ef

Can anyone help or explain my issue?

Many thanks,