D-Link DXS-3600 Series Cli Reference Manual page 1183

DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch CLI Reference Guide
Command Mode
Global Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
The reasons of packets that are destined to the CPU can be classified into three groups: manage,
protocol and route. The sub-interface is a logical interface, which handles the CPU received packets by
different groups. Generally speaking, the protocol packets should have higher priority to make sure the
functions work normally. The CPU usually is not involved in the routing of packets. In few cases, such as
learning new IP address or if the default route is not specified, some packets will be sent to the CPU for
software routing. Use this command to limit the rate of routed packets to avoid the CPU spending too
much time for routing packets.
Example
This example shows how to configure the rate limit of packets for the management sub-interface and the
threshold is 1000 packets per seconds.
Switch# configure terminal
Switch(config)# cpu-protect sub-interface manage pps 1000
Switch(config)#
95-4 cpu-protect type
This command is used to configure the rate limit of traffic destined to the CPU by the protocol type.
cpu-protect type PROTOCOL-NAME pps RATE
no cpu-protect type PROTOCOL-NAME
Parameters
PROTOCOL-NAME
RATE
Default
None.
Command Mode
Global Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
The CPU must handle certain packets, such as routing protocols, Layer 2 protocols, and packets for
management. If the traffic destined to the CPU overloads it, the CPU will spend much time processing
unnecessary traffic and the routing processes are impacted. To mitigate the impact on the CPU, use this
command to control the threshold of individual protocol packets.
Specifies the protocol name to be configured.
Specifies the threshold value. The unit is packets per second. When
set to 0, all packets of the specified protocol are dropped.
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