
DHCP Relay Commands
page 32-28
OmniSwitch 6250 CLI Reference Guide
November 2009
ip helper dhcp-snooping vlan
Enables or disables DHCP Snooping on a per VLAN basis. When this feature is enabled, all DHCP pack-
ets received on ports associated with the DHCP Snooping VLAN are filtered.
ip helper dhcp-snooping vlan vlan_id [mac-address verification {enable | disable}] [option-82 data-
insertion {enable | disable}]
no ip helper dhcp-snooping vlan vlan_id
Syntax Definitions
vlan_id
The VLAN identification number (1–4094).
mac-address verification
Enables or disables verifying the source MAC address of DHCP pack-
ets with the client MAC address contained in the same packet.
option-82 data-insertion
Enables or disables inserting Option-82 information into DHCP packets.
Defaults
By default, DHCP Snooping is disabled. When this feature is enabled for the specified VLAN, the follow-
ing default parameter values apply:
Platforms Supported
OmniSwitch 6250
Usage Guidelines
•
Use the
no
form of this command to disable DHCP Snooping for the specified VLAN.
•
The MAC address verification and Option-82 data insertion are applied to packets received on ports
associated with the DHCP Snooping VLAN.
•
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.
•
Note that disabling the Option-82 data insertion operation for a VLAN is not allowed when the bind-
ing table functionality is enabled.
Examples
-> ip helper dhcp-snooping vlan 100 enable
-> ip helper dhcp-snooping vlan 100 disable
parameter
default
mac-address verification
Enabled
option-82 data-insertion
Enabled
Summary of Contents for OmniSwitch 6250
Page 140: ...Power over Ethernet PoE Commands page 4 18 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 212: ...Session Management Commands page 6 52 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 270: ...File Management Commands page 7 58 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 280: ...Web Management Commands page 8 10 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 328: ...SNMP Commands page 10 32 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 338: ...DNS Commands page 11 10 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 392: ...Link Aggregation Commands page 12 54 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 440: ...802 1Q Commands page 15 8 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 628: ...Loopback Detection Commands page 17 12 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 768: ...Ethernet Port Commands page 20 96 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 826: ...VLAN Management Commands page 22 26 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 968: ...Ethernet OAM Commands page 25 56 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 1014: ...LINK OAM Commands page 26 46 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 1036: ...UDLD Commands page 27 22 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 1048: ...Port Mapping Commands page 28 12 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 1256: ...IPv6 Commands page 30 90 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 1276: ...RDP Commands page 31 20 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 1372: ...RIP Commands page 33 32 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 1702: ...QoS Policy Commands page 39 206 OmniSwitch CLI Reference Guide November 2009...
Page 1718: ...Policy Server Commands page 40 16 OmniSwitch 6250 CLI Reference Guide November 2009...
Page 2018: ...Index Index 6 OmniSwitch 6250 CLI Reference Guide November 2009...