Ip Helper Dhcp-Snooping - Alcatel-Lucent OmniSwitch 6250 Cli Reference Manual

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Table of Contents

DHCP Relay Commands

ip helper dhcp-snooping

Globally enables or disables DHCP Snooping for the switch. When this feature is enabled, all DHCP

packets received on all switch ports are filtered.

ip helper dhcp-snooping {enable | disable}

Syntax Definitions

By default, this feature is disabled.

Platforms Supported

OmniSwitch 6250

Usage Guidelines

If the DHCP relay agent Option-82 feature is enabled, DHCP Snooping is not available. These two

features are mutually exclusive.

If the DHCP Snooping feature is globally enabled for the switch, then configuring snooping on a per-

VLAN basis is not allowed. The opposite is also true; invoking VLAN based snooping prevents the use

of switch level snooping.

When DHCP Snooping is enabled at the switch level, MAC address verification and Option-82 data

insertion are enabled by default. In addition, the trust mode for all ports is set to the DHCP client only

-> ip helper dhcp-snooping enable

-> ip helper dhcp-snooping disable

Release History

Release 6.6.1; command was introduced.

Related Commands

ip helper dhcp-snooping vlan

show ip helper

iphelperDhcpSnooping

OmniSwitch 6250 CLI Reference Guide

Enables DHCP Snooping for the switch.

Disables DHCP Snooping for the switch.

.Enables or disables DHCP Snooping on a per VLAN basis.

Displays the current DHCP configuration for the switch.

November 2009