The command output show router pim bootstrap displays the status of the PIM Bootstrap Router (BSR) mechanism. The key indicators in this exhibit are the PIM Bootstrap State which is Bootstrap Router, and the Candidate BSR State which is Elected BSR. Furthermore, the RPF Neighbor is listed as Local, which signifies that this router is the origin of the Bootstrap Messages (BSMs) for the domain. A non-BSR router would show a different state (e.g., Accept BSMsg) and would list the IP address of an upstream router as its RPF Neighbor. This combination of output fields uniquely identifies the router as the one that has won the BSR election and is currently performing the BSR function.

A. Any router in the PIM multicast domain: A non-BSR router would display a different state and would have a non-local RPF neighbor from which it receives Bootstrap Messages.

B. Only from the Candidate-RP: This command displays BSR information, not Candidate-RP (C-RP) status. A C-RP advertises to the BSR; it is not necessarily the BSR itself.

C. Only from the Candidate-BSR: While this router is a Candidate-BSR (C-BSR), this option is not specific enough. A C-BSR that lost the election would show a different state, such as Not Elected.

1. Nokia 7750 SR OS R19.10.R1 Router Configuration Guide, Part: PIM, Section: PIM Command Reference

Reference: In the description for the show router pim bootstrap command, the output fields are explained. The Candidate BSR State field value of Elected BSR indicates that "The local router is the elected BSR." The RPF Neighbor field showing Local confirms the BSMs originate from this router, which is only true for the elected BSR.

2. Nokia 4A0-108 Courseware, Module: IP Multicast Routing

Reference: The course material on PIM-SM bootstrap mechanism details the BSR election process. It explains that only the router that wins the election will assume the Bootstrap Router state and originate Bootstrap Messages. The show router pim bootstrap command on the elected BSR will reflect this status with fields like Candidate BSR State: Elected BSR and RPF Neighbor: Local.