Connectivity Guide

Table 62. CoPP: Protocol mappings to queues, and default rate limits and buffer sizes - from release
10.4.2 and later (continued)
Queue Protocols Minimum rate
limit (in pps)
Maximum rate
limit (in pps)
Minimum
guaranteed
buffer (in
bytes)
Static shared
limit (in bytes)
9 FCoE 600 600 1664 48880
10 LACP 600 1000 1664 48880
11 STP, RSTP, MSTP 400 400 1664 48880
12 DOT1X, LLDP 500 500 1664 48880
13 IPv6 OSPF 600 1000 1664 48880
14 IPv4 OSPF 600 1000 1664 48880
15 BGP 600 1000 1664 48880
16 IPv4 DHCP, IPv6 DHCP 500 500 1664 48880
17 VRRP 600 1000 1664 48880
18 BFD 700 700 1664 48880
19 Remote CPS 700 1000 1664 48880
20 MCAST data 300 300 1664 20800
21 ACL logging 100 100 1664 20800
22 MCAST known data 300 300 1664 20800
For information about the current protocol to queue mapping and the rate-limit configured per queue, see show control-plane
info.
Configure control-plane policing
Rate-limiting the protocol CPU queues requires configuring control-plane type QoS policies.
● Create QoS policies, class maps and policy maps, for the desired CPU-bound queue.
● Associate the QoS policy with a particular rate-limit.
● Assign the QoS service policy to control plane queues.
By default, the peak information rate (pir) and committed information rate (cir) values are in packets per second (pps) for
control plane. CoPP for CPU queues converts the input rate from kilobits per second (kbps) to packets per second (pps),
assuming 64 bytes is the average packet size, and applies that rate to the corresponding queue – One kbps is roughly equivalent
to two pps.
1. Create a control-plane type class-map and configure a name for the class-map in CONFIGURATION mode.
class-map type control-plane class-map-name
2. Return to CONFIGURATION mode.
exit
3. Create an input policy-map to assign the QoS policy to the desired service queues in CONFIGURATION mode.
policy-map type control-plane policy-map-name
Quality of service
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