The Hello interval and Hello Hold Timeout timer values can be obtained from the global default values or configured globally on a router. The Hello Hold timeout timer value can also be configured through an interface. When configuring these values the following constraints must be followed:
The Hello Interval value must be less than 32767.
The Hello Hold Timeout value must be less than 65535.
The Hello Hold Timeout value must be greater than or equal to 2 times the Hello Interval value.
The values can be set that determine the values used on the configured router and values sent to adjacent peers for their configuration as follows:
Setting the LDP Hello interval values
Setting the LDP Hold time sent to adjacent LSRs
Determining the LDP Hold time on an MPLS interface
