Configuring the Timeout Period of a Neighbor

The timeout period of a neighbor can be set either globally or on an interface. If the multicast device does not receive any Hello message from a neighbor when the timeout period is expired, the device considers that the neighbor is unreachable. The timeout period of the neighbor must be longer than the interval for sending Hello messages.

Prerequisites

Before adjusting control parameters for maintaining neighbor relationships, complete the following tasks:

Configuring a unicast routing protocol
Configuring Basic PIM-DM Functions

Context

The configuration involves the following two cases:

Global configuration: It is valid on each interface.
Configuration on an interface: The configuration on an interface takes precedence over the global configuration. If the configuration on an interface is not done, the global configuration is used.

Procedure

Global Configuration
1. Access the system view.
  system-view
2. Access the PIM view.
  pim [ vpn-instance vpn-instance-name ]
3. Set the timeout period during which the neighbor is reachable.
  hello-option holdtime interval
  
  If no Hello message is received from a neighbor in the timeout period, the neighbor is considered unreachable.
Configuration on an Interface
1. Access the system view.
  system-view
2. Access the interface view.
  interface interface-type interface-number
3. Set the timeout period during which the neighbor is reachable.
  pim hello-option holdtime interval
  
  If no Hello message is received from a neighbor in the timeout period, the neighbor is considered unreachable.