Ip dhcp snooping, Ip dhcp – Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) User Manual

Page 1447

DHCP Snooping Commands

Software Reference for x310 Series Switches

C613-50046-01 REV A

AlliedWare Plus

Operating System - Version 5.4.4C

56.9

ip dhcp snooping

Use this command to enable DHCP snooping on one or more VLANs.

Use the no variant of this command to disable DHCP snooping on the VLANs.

Syntax

ip dhcp snooping

no ip dhcp snooping

Default

DHCP snooping is disabled on VLANs by default.

Mode

Interface Configuration (VLANs)

Usage

For DHCP snooping to operate on a VLAN, it must:

■

be enabled on the particular VLAN by using this command

■

be enabled globally on the switch by using the

service dhcp-snooping command on

page 56.24

■

have at least one port connected to a DHCP server configured as a trusted port by
using the

ip dhcp snooping trust command on page 56.20

Any ACLs on a port that permit traffic matching DHCP snooping entries and block other
traffic, will block all traffic if DHCP snooping is disabled on the port. If you disable DHCP
snooping on particular VLANs using this command, you must also remove any DHCP
snooping ACLs from the ports to maintain connectivity (

access-group command on

page 34.4

Examples

To enable DHCP snooping on VLANs 2 to 4, use the commands:

To disable DHCP snooping on the switch, use the command:

Related Commands

ip dhcp snooping trust
service dhcp-snooping
show ip dhcp snooping

awplus#

configure terminal

awplus(config)#

interface vlan2-vlan4

awplus(config-if)#