Overriding the Default Configuration Settings for the Extended
DHCP Relay Agent (NSM Procedure)
You can override the default configuration settings for
the extended DHCP relay agent. Specifying the overrides statement
with no subordinate statements removes all DHCP relay agent overrides
at that hierarchy level.
- In the NSM navigation tree, select Device Manager > Devices.
- Click the Device Tree tab,
and then double-click the device to select it.
- Click the Configuration tab.
In the configuration tree, select Forwarding Options
> DHCP Relay.
- Select Overrides.
- Add or modify settings as specified in Table 1.
- Click one:
- OK—Saves the changes.
- Cancel—Cancels the modifications.
Table 1: Overrides Configuration
Details
| Option |
Function |
Your Action |
Comment
|
Specifies the comment for the override.
|
In the Comment box, enter the comment.
|
always-write-giaddr
|
Overwrites the gateway IP address
(giaddr) of every DHCP packet with the gateway IP address of the DHCP
relay agent before forwarding the packet to the DHCP server.
|
Select the Always
Write Giaddr check box.
|
always-write-option-82
|
Overrides the DHCP relay agent
information option (option 82) in DHCP packets destined for a DHCP
server.
|
Select the Always
Write Option 82 check box.
|
layer2-unicast-replies
|
Overrides the setting of the broadcast
bit in DHCP request packets and instead use the Layer 2 unicast transmission
method to transmit DHCP Offer reply packets and DHCP ACK reply packets
from the DHCP server to DHCP clients during the discovery process.
|
Select the Layer2
Unicast Replies check box.
|
trust-option-82
|
Enables processing of DHCP client
packets that have a gateway IP address (giaddr) of 0 (zero) and contain
option 82 information.
|
Select the Trust
Option 82 check box.
|
disable-relay
|
Disables DHCP relay on specific
interfaces in a group.
|
Select the disable-relay check box.
|
Interface client limit
|
Specifies the interface client
limit.
|
From the Interface
Client Limit list, select the interface client limit.
|
No Arp
|
Disable Address Resolution Protocol
entry for this client.
|
Select the No Arp check box to drop the unwanted ARP requests.
|
Published: 2009-08-23
