Configure Control Plane Policing - Dell Z9000 Configuration Manual

10/25/40/50/100gbe throughput

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Figure 26. CoPP Implemented Versus CoPP Not Implemented

Configure Control Plane Policing

For example, border gateway protocol (BGP) and internet control message protocol (ICMP) share same

queue (Q6); Q6 has 400 PPS of bandwidth by default. The desired rate of ICMP is 100 PPS and the

remaining 300 PPS is assigned to BGP. If ICMP packets come at 400 PPS, BGP packets may be dropped

though ICMP packets are rate-limited to 100 PPS. You can solve this by increasing Q6 bandwidth to 700

PPS to allow both ICMP and BGP packets and then applying per-flow CoPP for ICMP and BGP packets.

The setting of this Q6 bandwidth is dependent on the incoming traffic for the set of protocols sharing the

same queue. If you are not aware of the incoming protocol traffic rate, you cannot set the required

queue rate limit value. You must complete queue bandwidth tuning carefully because the system cannot

open up to handle any rate, including traffic coming at the line rate.

CoPP policies are assigned on a per-protocol or a per-queue basis, and are assigned in CONTROL-

PLANE mode to each port-pipe.

Control Plane Policing (CoPP)