This document is an Internet Draft.
Internet Drafts are draft documents valid for a maximum of six months.
Internet Drafts may be updated, replaced, or obsoleted by other documents at any time. Each component owns the interfaces corresponding to its type. The PMBR has two primary roles. Furthermore, in case of transit networks, the PMBR acts to pass the multicast traffic through the PIM domain. This section discusses, in more detail, the message processing in each of the PMBR components.