A parks department sees rogue Auto-RP announcements sourced from a lab closet switch and must stop those mappings from influencing production routers. Which control best protects the multicast RP control plane?
Select an answer to reveal the explanation.
Short Explanation
A lab switch yelling “I’m the RP!” is like a fake PA system in city hall. Filter Auto-RP (or BSR) announcements so only blessed routers get believed. Ignoring that control plane is how a closet steals your sparse-mode traffic.
Full Explanation
Auto-RP and BSR distribute RP mapping information that every PIM router may trust unless filtered. Administrators should restrict which interfaces accept RP announcements/discovery and which candidate RPs are allowed, preventing rogue lab or misconfigured devices from becoming the effective RP. Timer tweaks, IGMP version changes, or disabling snooping do not authenticate or filter RP advertisements.