Configuring Dhcp Packet Rate Limit; Rate Limit Configuration Example - H3C S3100 Series Operation Manual

Configuring DHCP Packet Rate Limit

Configuring DHCP Packet Rate Limit
Follow these steps to configure rate limit of DHCP packets:
Operation
Enter system view
Enter port view
Enable the DHCP packet rate
limit function
Configure the maximum DHCP
packet rate allowed on the port
Enable the port state
auto-recovery function
Set the port state
auto-recovery interval
Enable the port state auto-recovery function before setting the auto-recovery interval.
You are not recommended to configure DHCP packet rate limit on the ports of an aggregation
group.

Rate Limit Configuration Example

Network requirements
As shown in Figure
Ethernet1/0/2 is connected to client B and Ethernet1/0/11 is connected to client A.
Enable DHCP snooping on the switch, and specify Ethernet1/0/1 as the DHCP snooping trusted
port.
Configure DHCP packet rate limit on Ethernet1/0/11 and set the maximum DHCP packet rate
allowed on the port to 100 pps.
Set the port state auto-recovery interval to 30 seconds on the switch.
system-view
interface interface-type
interface-number
dhcp rate-limit enable
dhcp rate-limit rate
dhcp protective-down
recover enable
dhcp protective-down
recover interval interval
4-1, Ethernet1/0/1 of the S3100-EI switch is connected to the DHCP server.
Command
4-2
Description
—
—
Required
By default, DHCP packet rate
limit is disabled.
Optional
By default, the maximum rate is
15 pps.
Optional
By default, the port state
auto-recovery function is
disabled.
Optional
The port state auto-recovery
interval is 300 seconds.