Configuring the Lifetime for the Default Neighbor Discovery Router
The default lifetime in router advertisement messages indicates the lifetime associated with the default router. To modify the default lifetime timer, include the default-lifetime statement:
default-lifetime seconds;
For a list of hierarchy levels at which you can include this statement, see the statement summary section for this statement.
By default, the default router lifetime is three times the maximum advertisement interval. For more information about the maximum advertisement interval, see Configuring the Frequency of Neighbor Discovery Advertisements.
