Dell S4820T, Configuration Manual

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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.
CoPP policies are configured by creating extended ACL rules and specifying rate-limits through QoS
policies. The ACLs and QoS policies are assigned as service-policies.
Configuring CoPP for Protocols
This section lists the commands necessary to create and enable the service-policies for CoPP.
For complete information about creating ACLs and QoS rules, refer to Access Control Lists (ACLs) and
Quality of Service (QoS) .
The basics for creating a CoPP service policy are to create a Layer 2, Layer 3, and/or an IPv6 ACL rule for
the desired protocol type. Then, create a QoS input policy to rate-limit the protocol traffics according to
the ACL. The ACL and QoS policies are finally assigned to a control-plane service policy for each port-
pipe.
1. Create a Layer 2 extended ACL for control-plane traffic policing for a particular protocol.
CONFIGURATION mode
mac access-list extended name cpu-qos permit {arp | frrp | gvrp | isis |
lacp | lldp | stp}
2. Create a Layer 3 extended ACL for control-plane traffic policing for a particular protocol.
CONFIGURATION mode
ip access-list extended name cpu-qos permit {bgp | dhcp | dhcp-relay | ftp |
icmp | igmp | msdp | ntp | ospf | pim | ip | ssh | telnet | vrrp}
3. Create an IPv6 ACL for control-plane traffic policing for a particular protocol.
CONFIGURATION mode
ipv6 access-list name cpu-qos permit {bgp | icmp | vrrp}
4. Create a QoS input policy for the router and assign the policing.
CONFIGURATION mode
qos-policy-input name cpu-qos rate-police
5. Create a QoS class map to differentiate the control-plane traffic and assign to an ACL.
CONFIGURATION mode
class-map match-any name cpu-qos match {ip | mac | ipv6} access-group name
6. Create a QoS input policy map to match to the class-map and qos-policy for each desired protocol.
CONFIGURATION mode
policy-map-input name cpu-qos class-map name qos-policy name
7. Enter Control Plane mode.
CONFIGURATION mode
control-plane-cpuqos
Control Plane Policing (CoPP)
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