Question 470
The HPE AOS-CX switching case is: The monitoring console shows an ISL outage but a network engineer misattributes the symptom to an unrelated DNS issue. Which TWO choices together provide the targeted remedy and independent validation? (Select TWO.)
Explanation
Correct Answers
The targeted correction for The monitoring console shows an ISL outage but a network engineer misattributes the symptom to an unrelated DNS issue is: Check VSX peer roles, ISL state, separate keepalive and multichassis LAG status when distribution connectivity is asymmetric. It reduces the risk that an ISL failure without a correctly operating peer control path can disrupt dual-homed systems and complicate split recovery.
A separate operational validation for The monitoring console shows an ISL outage but a network engineer misattributes the symptom to an unrelated DNS issue is: VSX state, ISL and keepalive show expected health and host traffic remains available after one controlled peer fault. 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 The monitoring console shows an ISL outage but a network engineer misattributes the symptom to an unrelated DNS issue requires the more specific vsx keepalive isl and peer-state fault control. The targeted action is: Check VSX peer roles, ISL state, separate keepalive and multichassis LAG status when distribution connectivity is asymmetric.
This alternative concerns trunk allowed vlan and native tag fault detection; its associated risk is: One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break. The observed case The monitoring console shows an ISL outage but a network engineer misattributes the symptom to an unrelated DNS issue requires the more specific vsx keepalive isl and peer-state fault control. The targeted action is: Check VSX peer roles, ISL state, separate keepalive and multichassis LAG status when distribution connectivity is asymmetric.
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 The monitoring console shows an ISL outage but a network engineer misattributes the symptom to an unrelated DNS issue requires the more specific vsx keepalive isl and peer-state fault control. The targeted action is: Check VSX peer roles, ISL state, separate keepalive and multichassis LAG status when distribution connectivity is asymmetric.