By default, RSVP allows all of a class type’s bandwidth (100 percent) to be used for RSVP reservations. When you oversubscribe a class type for a multiclass LSP, the aggregate demand of all RSVP sessions is allowed to exceed the actual capacity of the class type.
For detailed instructions on how to configure the bandwidth subscription for class types, see Configuring the Bandwidth Subscription Percentage for LSPs.