INS_CWGE24MS2_REV–
10/05/16 PAGE 203
INSTALLATION AND OPERATION MANUAL
CWGE24MS2
TECH SUPPORT: 1.888.678.9427
Notices
There are a global state and per VLAN states.
When the global state is disabled, the DHCP Snooping on the Switch is disabled even per VLAN
states are enabled.
When the global state is enabled, user must enable per VLAN states to enable the DHCP
Snooping on the specific VLAN.
VLAN 1
: port 1-10.
DHCP Client-1
: connect to port 3.
DHCP Server
: connect to port 1.
Procedures:
Default environments:
» DHCP Client-1: ipconfig /release
» DHCP Client-1: ipconfig /renew
=> DHCP Client-1 can get an IP address.
Enable the global DHCP Snooping.
» CWGE24MS2(config)#dhcp-snooping
» DHCP Client-1: ipconfig /release
» DHCP Client-1: ipconfig /renew
=> DHCP Client-1 can get an IP address.
Enable the global DHCP Snooping and VLAN 1 DHCP Snooping.
» CWGE24MS2(config)#dhcp-snooping
» CWGE24MS2(config)#dhcp-snooping vlan 1
» DHCP Client-1: ipconfig /release
» DHCP Client-1: ipconfig /renew
=> DHCP Client-1 cannot get an IP address.
; Because the DHCP server connects to a un-trust port.