User's Guide

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TRENDnet User’s Guide
Managed Industrial L2 Switch
102
VLAN 1: port 1-10.
DHCP Client-1: connect to port 3.
DHCP Server: connect to port 1.
Procedures:
1. Default environments:
A. DHCP Client-1: ipconfig /release
B. DHCP Client-1: ipconfig /renew
➔ DHCP Client-1 can get an IP address.
2. Enable the global DHCP Snooping.
A. [DEVICE_NAME](config)#dhcp-snooping
B. DHCP Client-1: ipconfig /release
C. DHCP Client-1: ipconfig /renew
➔ DHCP Client-1 can get an IP address.
3. Enable the global DHCP Snooping and VLAN 1 DHCP Snooping.
A. [DEVICE_NAME](config)#dhcp-snooping
B. [DEVICE_NAME](config)#dhcp-snooping vlan 1
C. DHCP Client-1: ipconfig /release
D. DHCP Client-1: ipconfig /renew
➔ DHCP Client-1 cannot get an IP address.
; Because the DHCP server connects to a un-trust port.
4. Enable the global DHCP Snooping and VLAN 1 DHCP Snooping.
A. [DEVICE_NAME](config)#dhcp-snooping
B. [DEVICE_NAME](config)#dhcp-snooping vlan 1
C. [DEVICE_NAME](config)#interface gi1/0/1
D. [DEVICE_NAME](config-if)#dhcp-snooping trust
E. DHCP Client-1: ipconfig /release
F. DHCP Client-1: ipconfig /renew
➔ DHCP Client-1 can get an IP address.
5. If you configure a static host entry in the DHCP snooping binding table, and then
you want to change the host to DHCP client, the host will not get a new IP from
DHCP server, and then you must delete the static host entry first.
CLI Configuration
Node
Command
Description
enable
show dhcp-snooping
This command displays the current
DHCP snooping configurations.
configure
dhcp-snooping (disable|enable)
This command disables/enables the
DHCP snooping on the switch.
configure
dhcp-snooping vlan VLANID
This command enables the DHCP
snooping function on a VLAN or
range of VLANs.
configure
no dhcp-snooping vlan VLANID
This command disables the DHCP
snooping function on a VLAN or
range of VLANs.
configure
dhcp-snooping server IPADDR
This command configures a valid
DHCP server.
interface
dhcp-snooping host
This command configures the
maximum host count for the
specific port.
interface
no dhcp-snooping host
This command configures the
maximum host count to default for
the specific port.
interface
dhcp-snooping trust
This command configures the trust
port for the specific port.
interface
no dhcp-snooping trust
This command configures the un-
trust port for the specific port.
configure
interface range
gigabitethernet1/0/ PORTLISTS
This command enters the interface
configure node.