explicit-null
Use this command to send explicit-null labels to upstream router, instead of implicit-null labels.
If php is enabled then implicit-null label is advertised, then the penultimate hop removes the label and sends the packet as a plain IP packet to the egress router. The explicit-null command advertises label 0 and retains the label so the egress router can pop it. For details about usage of explicit-null, please refer to RFC 3032.
Use the no parameter with this command to stop sending explicit-null labels for directly-connected FECs to upstream router and resume sending non reserved labels.
Command Syntax
explicit-null
no explicit-null
Parameters
None
Default
By default, no php is enabled.
Command Mode
Router mode
Applicability
This command was introduced before OcNOS version 1.3.
Examples
#configure terminal
(config)#router rsvp
(config-router)#explicit-null
Last modified date: 10/17/2023