Alcatel-Lucent OmniSwitch 6250, Cli Reference Manual, Page: 1292 / 2018

DHCP Relay Commands
page 32-16 OmniSwitch 6250 CLI Reference Guide November 2009
ip helper agent-information policy
Configures a policy that determines how the DHCP relay agent will handle DHCP packets that already
contain an Option-82 field.
ip helper agent-information policy {drop | keep | replace}
Syntax Definitions
drop Drop DHCP packets that already contain an Option-82 field.
keep Keep the existing Option-82 field information and continue to relay the
DHCP packet.
replace Replace the existing Option-82 field information with local relay agent
information and continue to relay the DHCP packet.
Defaults
By default, DHCP packets that already contain an Option-82 field are dropped.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
•
The policy configured with this command is only applied if the DHCP Option-82 feature is enabled for
the switch.
•
The agent information policy is not applied if the DHCP relay agent receives a DHCP packet from a
client that contains a non-zero value for the gateway IP address (giaddr). In this case, the agent will not
insert the relay agent information option into the DHCP packet and will forward the packet to the
DHCP server.
•
Note that if a DHCP packet contains a gateway IP address (giaddr) value that matches a local subnet
and also contains the Option-82 field, the packet is dropped by the relay agent.
Examples
-> ip helper agent-information policy drop
-> ip helper agent-information policy keep
-> ip helper agent-information policy replace
Release History
Release 6.6.1; command was introduced.