BSR

BSR is expanded two ways:

1. bootstrap router

   A BSR is a PIM router that manages RP and group information in a multicast network.

2. broadband service router

   A BSR terminates L2 access services and routes over IP/MPLS, supporting hundreds of ports and sophisticated QoS for services and for differentiating content and source. An example of a BSR is the 7750 SR.