Operation Manual – DHCP
H3C S3100 Series Ethernet Switches Chapter 3 DHCP Packet Rate Limit Configuration
3-3
Operation Command Description
Configure the port state
auto-recovery interval
dhcp protective-down
recover interval interval
Optional
By default, the
auto-discovery interval is
300 seconds.
3.3 Rate Limit Configuration Example
I. Network requirements
As shown in Figure 3-1, Ethernet1/0/1 of the S3100-EI switch is connected to the
DHCP server. Ethernet1/0/2 is connected to client B and Ethernet1/0/11 is connected to
client A.
z Enable DHCP snooping on the switch, and specify Ethernet1/0/1 as the DHCP
snooping trusted port.
z Configure DHCP packet rate limit on Ethernet1/0/11 and set the maximum DHCP
packet rate allowed on the port to 100 pps.
z Set the port state auto-recovery interval to 30 seconds on the switch.
II. Networking diagram
Ethernet1/0/2
Client A Client B
Ethernet1/0/11
DHCP Server
DHCP Snooping
Ethernet1/0/1
Figure 3-1 Network diagram for DHCP packet rate limit configuration
III. Configuration procedure
# Enable DHCP snooping on the switch.
<Switch> system-view
[Switch] dhcp-snooping
# Specify Ethernet1/0/1 as the trusted port.
[Switch] interface Ethernet1/0/1
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