DHCP Relay Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 32-21
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
enable Enables DHCP Snooping for the switch.
disable Disables DHCP Snooping for the switch.
Defaults
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
mode.
Examples
-> ip helper dhcp-snooping enable
-> ip helper dhcp-snooping disable
Release History
Release 6.6.1; command was introduced.
Related Commands
MIB Objects
iphelperDhcpSnooping
ip helper dhcp-snooping vlan .Enables or disables DHCP Snooping on a per VLAN basis.
show ip helper Displays the current DHCP configuration for the switch.
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