Ruijie RG-S2900G-E Series - Page 644

Configuration Guide DHCP Snooping Configuration
Other Precautions on DHCP Snooping Configuration
1. The DHCP Snooping function and the DHCP Relay Option82 function are mutually exclusive.
That is, you can not enable the DHCP Snooping function and the DHCP Relay Option82
function at the same time.
2. Security control is disabled for the users on the TRUST port.
DHCP Snooping Configuration
Enabling and Disabling DHCP Snooping
The DHCP Snooping function of the device is disabled by default. To enable DHCP Snooping
and then monitor DHCP packets, execute the following command.
Command
Description
Ruijie# configure terminal
Enter the global configuration mode.
Ruijie(config)# [no] ip dhcp snooping
Enable or disable DHCP snooping.
The following example demonstrates how to enable the DHCP snooping function of the device:
Ruijie# configure terminal
Ruijie(config)# ip dhcp snooping
Ruijie(config)# end
Caution
DHCP Snooping and Private VLAN function can not be co-used.
Configuring DHCP Snooping VLAN
This command enables DHCP Snooping in corresponding VLAN, adding this VLAN to
enabled DHCP Snooping VLAN range.
Command
Description
Ruijie# configure terminal
Enter the global configuration mode.
Ruijie(config)# [no] ip dhcp snooping vlan
{vlan-rng | {vlan-min [vlan-max]}}
Configures enabled Snooping VLAN.
Here is an example of configuring DHCP snooping enabled in VLAN1000:
Ruijie# configure terminal
Ruijie(config)# ip dhcp snooping vlan 1000
Ruijie(config)# end