A node is configured with a network element profile. A network element profile has all of the necessary information for node discovery, including the node NEID, NEIP, Vendor Identifier, chassis type, and MAC address. The network element profile can be added to an OSPF area in VPRN and when it is, the network element information is advertised using OSPF type 10 opaque LSA to the rest of the network. These discovery procedures are only available in VPRN.
An aggregation node (node closest to the NMS) gathers all of the network element information received using OSPF and converts this information into a MIB. The aggregation node also generates traps as necessary to update the NMS when the configure system network-element-discovery generate-traps command is configured. In addition to the traps, the NMS can walk the MIB table to update its new view of the network.
The node can be discovered using an IPv4 or IPv6 NEIP but the advertisement protocol is always OSPFv2; OSPFv3 is not supported. If the NMS wants to discover a node in an IPv6 network, both OSPFv2 and OSPFv3 must be enabled. OSPFv2 advertises the node information to the aggregation node to generate the traps and build the MIB table but OSPFv3 is used to provide the routing information needed to reach that node using an IPv6 network.
The minimum configuration required on the node so that it can be discovered includes:
a management VPRN
a network element profile configured under the config>system>network-element-discovery context
a loopback or physical L3 interface in the VPRN with same IP address as the network element profile NEIP
a physical interface in the VPRN (SAP) with an optional unnumbered interface inheriting the IP address from the loopback IP (this is light VPRN where the uplink is a SAP and not a spoke-SDP)
an optional VLAN DOT1Q support for the L3 interface
a temporary username and password. This could be the default.
OSPF on the physical L3 interface in the VPRN (SAP). OSPF must be configured as P2P and has an additional flag to include the LSA type 10 opaque value.
SSH or Telnet management enabled on the VPRN, these are disabled by default
As all discovery is done using the VPRN SAP, there is no need for GRT configuration.