RSVP-TE Scalability - Node Hello Session

You can configure node-ID-based RSVP hellos to ensure that Juniper Networks devices can interoperate with the equipment of other vendors. By default, a device uses interface-based RSVP hellos. Node-ID-based RSVP hellos are specified in RFC 4558, Node-ID Based Resource Reservation Protocol (RSVP) Hello: A Clarification Statement. RSVP node-ID hellos are useful if you have configured BFD to detect problems over RSVP interfaces, allowing you to disable interface hellos for these interfaces. You can also use node-ID hellos for graceful restart procedures. You can enable node-ID hellos globally for all RSVP neighbors. By default, the device does not support node-ID hellos, hence it will not accept any node-ID hello packets. You can also explicitly disable RSVP interface hellos globally. You may need this type of configuration in networks where the Juniper Networks router has numerous RSVP connections with equipment from other vendors. However, if you disable RSVP interface hellos globally, you can also configure a hello interval on an RSVP interface using the hello-interval statement. This configuration disables RSVP interface hellos globally but enables RSVP interface hellos on the specified interface (the RSVP interface on which you configure the hello-interval statement). This configuration might be necessary in a heterogeneous network in which some devices support RSVP node-ID hellos and other devices support RSVP interface hellos.