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

ip helper dhcp-snooping binding

Enables or disables the DHCP Snooping binding table functionality. The binding table contains the MAC
address, IP address, lease time, binding type (dynamic or static), VLAN number, and the interface infor-
mation that corresponds to a local untrusted port on the switch. In addition, this command is also used to
configure a static entry in the binding table.
ip helper dhcp-snooping port binding {[enable | disable] | [mac_address port slot/port address
ip_address lease-time time vlan vlan_id]}
no ip helper dhcp-snooping port binding mac_address port slot/port address ip_address lease-time
time vlan vlan_id
Syntax Definitions
enable
disable
mac_address
slot/port
ip_address
time
vlan_id
Defaults
By default, the binding table functionality is enabled when the DHCP Snooping feature is enabled for the
switch or for a VLAN.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
•
Use the no form of this command to remove a static entry from the DHCP Snooping binding table.
•
The enable and disable parameters are independent of the other parameters, in that they are only used
to turn the binding table functionality on and off. Enabling or disabling binding table functionality and
creating a static binding table entry is not allowed on the same command line.
•
Note that enabling the binding table functionality is not allowed if Option-82 data insertion is not
enabled at either the switch or VLAN level.
•
Static binding table entries are created using this command. If DHCP Snooping binding table function-
ality is not enabled, creating a static entry is not allowed.
•
Dynamic binding table entries are created when the relay agent receives a DHCPACK packet.
page 32-36
Enables the creation of binding table entries.
Disables the creation of binding table entries.
The client MAC address.
The slot and port number that received the DHCP request.
The IP address that the DHCP server offered to the client.
The IP address lease time assigned by the DHCP server.
The VLAN identification number (1–4094) of the VLAN to which the
client belongs.
OmniSwitch 6250 CLI Reference Guide
DHCP Relay Commands
November 2009