DR

DR can be expanded in the following ways:

1. designated router

   A PIM-enabled router that manages multicast stream delivery for a group of receiver hosts in a multicast network. DRs exchange information regarding multicast sources and dynamically adjust to changes in source availability.

2. disaster recovery

   A disaster-recovery (DR) NSP deployment consists of identical primary and standby NSP clusters and ancillary components in separate data centers. One cluster has what is called the primary role, and processes all client requests.

   The standby NSP cluster in a DR deployment operates in warm standby mode. If a primary cluster failure is detected, the standby automatically initializes as the primary, and fully assumes the primary role. Nokia encourages combining DR with high-availability (HA) for a robust and efficient network redundancy and resiliency solution.