Alcatel-Lucent 7750 SR Manual page 1274

VPRN Service Configuration Commands
trusted
Syntax [no] trusted
Context config>service>vprn>if>dhcp
config>service>vprn>sub-if>grp-if>dhcp
Description According to RFC 3046, DHCP Relay Agent Information Option, a DHCP request where the giaddr is
0.0.0.0 and which contains a Option 82 field in the packet, should be discarded, unless it arrives on a
"trusted" circuit.
If trusted mode is enabled on an IP interface, the relay agent (the SR-Series) will modify the request's
giaddr to be equal to the ingress interface and forward the request.
Note that this behavior only applies when the action in the Relay Agent Information Option is "keep".
In the case where the Option 82 field is being replaced by the relay agent (action = "replace"), the
original Option 82 information is lost anyway, and there is thus no reason for enabling the trusted
option.
The no form of this command returns the system to the default.
Default
not enabled
use-arp
Syntax [no] use-arp
Context config>service>vprn>if>dhcp
Description This command enables the use of ARP to determine the destination heardware address.
The no form of the command disables the use of ARP to determine the destination heardware address
user-db
Syntax user-db local-user-db-name
no user-db
Context config>service>vprn>sub-if>grp-if>dhcp
Description
This command configures the local user database to use for authentication.
The no form of the command removes the value from the configuration.
Default
no user-db
Parameters local-user-db-name — Specifies the local user database to use for authentication.
Page 1274 7750 SR OS Services Guide