How is the highest priority BSR router identified when multiple routers have the same priority?

In a scenario where multiple Bootstrap Routers (BSRs) are present and share the same priority, the BSR selection process involves identifying the router with the highest IP address among the candidates. This is a standard behavior in protocols like Protocol Independent Multicast (PIM), where tie-breaking mechanisms are essential for establishing a single BSR in the multicast domain.

The process ensures a clear and deterministic method of selecting a BSR, which is crucial for efficiently disseminating multicast group information across the network. By choosing the router with the highest IP address, the selection process can avoid ambiguity, promoting stability and predictability in multicast routing.

This approach is particularly useful in network environments where multiple routers may be attempting to assume the BSR role simultaneously due to similar configurations or states. It enables operators to maintain network efficiency and to manage multicast traffic effectively, minimizing conflicts and disruptions that could arise from having multiple active BSRs.