Configuring RSVP hello extension
When RSVP hello extension is enabled on an interface, the device receives and sends hello messages through the interface to detect the neighbor's status.
If the device receives a hello request from the neighbor, the device replies with a hello ACK message. If the device receives no hello request from the neighbor within the interval specified by the hello interval command, the device sends hello requests to the neighbor.
When the number of consecutive lost hellos or erroneous hellos from the neighbor reaches the maximum (specified by the hello lost command), the device determines the neighbor is in fault. If GR is configured, the device serves as a GR helper to help the neighbor to restart. If FRR is configured, the device performs an FRR. For more information about FRR, see "Configuring MPLS TE."
To configure RSVP hello extension:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter RSVP view. | rsvp | N/A |
3. Configure the maximum number of consecutive lost or erroneous hellos. | hello lost times | By default, the maximum number is 4. |
4. Configure the interval for sending hello requests. | hello interval interval | By default, hello requests are sent every 5 seconds. |
5. Return to system view. | quit | N/A |
6. Enter interface view. | interface interface-type interface-number | N/A |
7. Enable RSVP hello extension. | rsvp hello enable | By default, RSVP hello extension is disabled. |