Duplicate multicast frames appear on a multihomed municipal Ethernet Segment after a change. Which EVPN multicast interaction should engineers review first?
Select an answer to reveal the explanation.
Short Explanation
Two leaves both shoving the same multicast onto a dual-homed server segment is a classic DF/ESI foul. Fix who is allowed to forward into that ES before tweaking underlay hellos or Type-5 loopbacks. Multihoming discipline stops the echo.
Full Explanation
On a multihomed ES, only the Designated Forwarder should forward BUM/multicast toward the segment for a given service, preventing duplicates. Engineers should validate DF election and ESI signaling when duplicates appear. Underlay OSPF timers, Type-5 loopback export, and unrelated ARP-suppression tweaks do not address that multihoming multicast failure mode.