Question 230
At Fairmont Logistics, the distribution-center switching team is preparing a warehouse device rollout. The operational constraint is critical handheld scanner uptime. A production-readiness reviewer asks for proof addressing: A video VLAN floods all switch ports with a multicast stream although only some hosts joined. Which result BEST demonstrates that this specific issue was resolved?
Explanation
Correct Answer
Only member ports and required router-facing ports receive the multicast traffic during observation. This is the relevant acceptance observation for the reported issue: A video VLAN floods all switch ports with a multicast stream although only some hosts joined. The intended corrective choice is: Enable and validate IGMP snooping with correct multicast group membership on the receiver VLAN. At Fairmont Logistics, this outcome verifies actual operation under critical handheld scanner uptime, rather than only a ticket marked complete.
Incorrect Answers
Receiver memberships persist across query intervals and multicast delivery remains stable. Such an observation would verify a separate issue: IGMP membership entries disappear on a standalone VLAN because no device sends periodic membership queries. It would follow the distinct action: Provide a suitable IGMP querier or multicast router for the VLAN under the supported design. Here the reported failure is A video VLAN floods all switch ports with a multicast stream although only some hosts joined. The decisive result for Fairmont Logistics must instead be: Only member ports and required router-facing ports receive the multicast traffic during observation.
A cross-subnet test receiver obtains the intended multicast group while unrelated segments remain unaffected. Such an observation would verify a separate issue: Receivers in another routed subnet cannot join an allowed multicast source despite working unicast routing. It would follow the distinct action: Use a supported multicast routing design such as PIM with correct rendezvous/source reachability where required. Here the reported failure is A video VLAN floods all switch ports with a multicast stream although only some hosts joined. The decisive result for Fairmont Logistics must instead be: Only member ports and required router-facing ports receive the multicast traffic during observation.
The intended members join a healthy single VSF stack with correct member roles. Such an observation would verify a separate issue: An access layer needs one logical stack of compatible CX members with dedicated stacking links. It would follow the distinct action: Build a supported VSF topology with validated member identity and links. Here the reported failure is A video VLAN floods all switch ports with a multicast stream although only some hosts joined. The decisive result for Fairmont Logistics must instead be: Only member ports and required router-facing ports receive the multicast traffic during observation.