Huawei performed ping tests on the NE40E and its connected access router using 56-byte packets. The packets were transmitted and received normally. The link was working normally.
Huawei then checked the CAR configuration for the NE40E port and obtained the following information.
traffic behavior AoZuWei-ratelimit
car cir 10000 cbs 10000 pbs 0 green pass yellow pass red discardAfter modifying the value of CBS to 15000, Huawei pinged the NE40E from the access router using 10240-byte packets. The packets were normally received and forward.
The set CBS value was inappropriate.
When CAR is used for traffic policing, CIR specifies the average traffic rate allowed and CBS specifies the maximum burst traffic size.It is recommended that you set CBS to 1.5 to 2 times that of CIR. If you specify only CIR in configurations, then CBS takes the same value as CIR. In this case, CIR is set to 10000 and CBS is not specified but takes the same value as CIR. When the burst traffic is larger than 10000 bytes, they will be randomly discarded.