cp-rate-limit enhance

Format

cp-rate-limit enhance { port | { dhcp | dhcpv6 | icmp | icmpv6 } } cir cir-value [ cbs cbs-value ]

undo cp-rate-limit enhance { port | { dhcp | dhcpv6 | icmp | icmpv6 } } [ cir cir-value [ cbs cbs-value ] ]

Parameters

Parameter	Description	Value
port	Indicates that the rate at which an interface sends packets of a specific protocol to the CPU is restricted.	-
dhcp	Indicates that the rate at which an interface sends DHCP packets to the CPU is restricted.	-
dhcpv6	Indicates that the rate at which an interface sends DHCPv6 packets to the CPU is restricted.	-
icmp	Indicates that the rate at which an interface sends ICMP packets to the CPU is restricted.	-
icmpv6	Indicates that the rate at which an interface sends ICMPv6 packets to the CPU is restricted.	-
cir cir-value	Specifies the CIR.	The value is an integer ranging from 32 to 1000000, in packet/s. If an interface is configured with the port-vlan-car and igmp-vlan-car, it is recommended that the bandwidth of the port-vlan-car be greater than that of the igmp-vlan-car. If the bandwidth of the port-vlan-car is smaller than that of the igmp-vlan-car, the igmp-vlan-car configuration becomes invalid.
cbs cbs-value	Specifies the committed burst size (CBS), that is, the depth of the token bucket indicating the peak size of packets that can pass through at a burst.	The value is an integer ranging from 100 to 33554432, in bytes. It is recommended that the CBS be set to a value greater than 10 times the packet length. The default CBS value is equal to cir-value. The cbs-value that takes effect is at least 187 times the cir-value. If the configured cbs-value is less than 187 times the cir-value, the cbs-value that takes effect is 187 times the cir-value. If the configured cbs-value is greater than 187 times the cir-value, the configured cbs-value takes effect.
enhance	Indicates the port-vlan-car level-2 CAR.	-

Views

Layer 2 100GE interface view, 100GE interface view, 10G LAN interface view, 10G WAN interface view, Layer 2 40GE interface view, 40GE interface view, Layer 2 Eth-Trunk interface view, Eth-Trunk interface view, Layer 2 GE interface view, GE optical interface view, GE electrical interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
soc	write

Usage Guidelines

Usage Scenario

To restrict the rate at which packets of a specific protocol are sent to the CPU, run the cp-rate-limit enhance command.

Rate limiting does not apply to the following packets to be sent to the CPU:

Link Aggregation Control Protocol (LACP)
Bridge protocol data unit (BPDU)
Reverse Address Resolution Protocol (RARP)
CHDLC_KEEPALIVE
IPv6_Neighbor Advertisement (IPV6_NA)
Two-Way Active Measurement Protocol (TWAMP)
Data communication network (DCN)
PPP_LLDP
IPV6MC_PIM
IPv6_Router Advertisement (IPV6_RA)
IPv6_Router Solicitation (IPV6_RS)
Hierarchy VLAN Register Protocol (HVRP)
IPv4_Virtual eXtensible Local Area Network (IPV4_VXLAN)
IPv6_Neighbor Solicitation (IPV6_NS)

Configuration Impact

The rate of the packets on the abnormal ports will be limited, with other packets not being affected.

Precautions

Interface-based CAR is configured on an interface and restricts the overall rate at which packets on the interface and its sub-interfaces are sent to the CPU.
Interface-based CAR applies to all VLANs on an interface.

Example

# Set the CIR of DHCP packets to be sent to the CPU to 1000 packet/s and the CBS to 2000 bytes on GE 0/1/1.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/1
[*HUAWEI-GigabitEthernet0/1/1] cp-rate-limit enhance port cir 1000 cbs 2000

# Set the CIR of ICMP packets to be sent to the CPU to 200 packet/s and the CBS to 2000 bytes.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] cp-rate-limit enhance icmp cir 200 cbs 2000