The centerpiece of legacy in the Diameter base configuration in an SR node is a diameter-peer-policy where all the Diameter base parameters related to communication with other external Diameter peers are defined (peering connections, DiameterIdentity, timers, and so on). This diameter-peer-policy is then associated with Diameter applications (NASREQ, Gx, Gy) which rely on it to interact outside the network.
In legacy Diameter base, the origins are configured under the diameter-peer-policy:
config>aaa>diam-peer-plcy#
origin-host <origin-host-string>
origin-realm <origin-realm-string>
while the destinations are configured one level below, under the peers:
config>aaa>diam>diameter-peer-plcy>peer#
destination-host <destination-host-string>
destination-realm <destination-realm-string>
If these parameters are not configured, the diameter-peer-policy is operationally down.
Applications (NASREQ, Gx, and Gy) are associated with the diameter-peer-policy through the diameter-application:
config>subscr-mgmt>diam-appl-plcy#
diameter-peer-policy <name>