Question 430
The HPE AOS-CX switching case is: A new building's CCTV VLAN never passes the interbuilding link despite healthy physical carrier. Which TWO choices together provide the targeted remedy and independent validation? (Select TWO.)
Explanation
Correct Answers
The targeted correction for A new building's CCTV VLAN never passes the interbuilding link despite healthy physical carrier is: Trace the affected VLAN over all inter-switch trunks and reconcile tagged or untagged handling at each hop. It reduces the risk that one mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break.
A separate operational validation for A new building's CCTV VLAN never passes the interbuilding link despite healthy physical carrier is: A probe from each side of the affected trunk passes on the required VLAN without unapproved tag leakage. It proves intended behavior instead of accepting configuration presence alone.
Incorrect Answers
This alternative concerns ethernet carrier optic and physical fault isolation; its associated risk is: Repeated CRC errors or light loss can mimic application failures even when the port intermittently reports up. The observed case A new building's CCTV VLAN never passes the interbuilding link despite healthy physical carrier requires the more specific trunk allowed vlan and native tag fault detection control. The targeted action is: Trace the affected VLAN over all inter-switch trunks and reconcile tagged or untagged handling at each hop.
This alternative concerns spanning tree topology and root inconsistency; its associated risk is: An unexpected root or mismatched region can suppress the intended redundant forwarding path and cause intermittent client connectivity. The observed case A new building's CCTV VLAN never passes the interbuilding link despite healthy physical carrier requires the more specific trunk allowed vlan and native tag fault detection control. The targeted action is: Trace the affected VLAN over all inter-switch trunks and reconcile tagged or untagged handling at each hop.
This alternative concerns dhcp and wired-authentication first-hop failures; its associated risk is: A blocked DHCP relay or failed RADIUS policy can masquerade as a dead network even though forwarding interfaces remain operational. The observed case A new building's CCTV VLAN never passes the interbuilding link despite healthy physical carrier requires the more specific trunk allowed vlan and native tag fault detection control. The targeted action is: Trace the affected VLAN over all inter-switch trunks and reconcile tagged or untagged handling at each hop.