07-Security Configuration Guide

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24-Protocol Packet Rate Limit Configuration
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24-Protocol Packet Rate Limit Configuration 39.79 KB

Configuring protocol packet rate limit

This feature helps you rate-limit packets of a specific protocol to prevent the packets from occupying too much bandwidth.

Protocol packets can be rate-limited in the following modes:

·     Bandwidth limit per protocol—You set a maximum bandwidth for packets of a specific protocol. When the maximum bandwidth is exceeded, the packets are discarded.

·     Bandwidth limit per flow—You set a maximum bandwidth for each flow to ensure that the same kind of requests from all users are fairly treated. Packets of the same protocol and from the same user are considered as one flow. The system records the number of passed and dropped protocol packets to help network administrators locate problems. Bandwidth limit per flow takes effect only when bandwidth limit per protocol takes effect.

Enabling protocol packet rate limit

Step

Command

Remarks

1.     Enter system view.

system-view

N/A

2.     Enable protocol packet rate limit.

anti-attack enable

By default, protocol packet rate limit is disabled.

 

Enabling per-protocol bandwidth limit

Step

Command

Remarks

1.     Enter system view.

system-view

N/A

2.     Enable per-protocol bandwidth limit.

anti-attack protocol { all | protocol } enable

By default, per-protocol bandwidth limit is disabled for all protocols.

To display the protocols whose packets can be rate limited, use the display anti-attack protocol command.

 

Configuring the threshold for per-protocol bandwidth limit

Step

Command

Remarks

1.     Enter system view.

system-view

N/A

2.     Configure the threshold for per-protocol bandwidth limit.

anti-attack protocol protocol threshold rate-limit

Optional.

Each protocol has a default threshold. You can use the display anti-attack protocol { protocol } command to view the default threshold for a protocol.

 

Configuring the threshold for per-flow bandwidth limit

Step

Command

Remarks

1.     Enter system view.

system-view

N/A

2.     Enable per-flow bandwidth limit and configure the threshold.

anti-attack protocol protocol flow-threshold flow-rate-limit

By default, per-flow bandwidth limit is disabled for packets of all protocols.

 

Table 1 Supported number of flows of each device

Device type

WX3500E/WX5000 series

WX6000 series

WX3000/ WX3000E series

WX5500E series

Supported number of flows

4096

8192

1024

8192

 

 

NOTE:

Support for the number of flows varies by device model. The system automatically clears all flow entries when the maximum number is reached.

 

Displaying and maintaining protocol packet rate limit

Task

Command

Remarks

Display rate limit information about the specified protocol or all protocols.

display anti-attack { all | protocol [ protocol ] }

Available in any view.

 

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