4-3
Networking diagram
Figure 4-1 Network diagram for DHCP packet rate limit configuration
Ethernet1/0/2
Client A Client B
Ethernet1/0/11
DHCP Server
DHCP Snooping
Ethernet1/0/1
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
[Switch-Ethernet1/0/1] dhcp-snooping trust
[Switch-Ethernet1/0/1] quit
# Enable auto recovery.
[Switch] dhcp protective-down recover enable
# Set the port state auto-recovery interval to 30 seconds.
[Switch] dhcp protective-down recover interval 30
# Enter port view.
[Switch] interface Ethernet 1/0/11
# Enable DHCP packet rate limit on Ethernet1/0/11.
[Switch-Ethernet1/0/11] dhcp rate-limit enable
# Set the maximum DHCP packet rate allowed on Ethernet1/0/11 to 100 pps.
[Switch-Ethernet1/0/11] dhcp rate-limit 100
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