HPE7-A06 · Question #85
Refer to the exhibit. Acme Corp has VM workload running from ToR-1, and has noticed performance degradation. They suspect ToR-1 uplinks are periodically overutilized. List valid reasons why ToR-1…
The correct answer is A. The customer has used the default MSTP region configuration. C. The VLAN to instance mapping is not the same on all switches. With default MSTP region settings, devices form different regions, so only the CIST participates across them. This removes per-instance load-sharing and pushes all VLANs over a single active uplink, overutilizing it. If VLAN-to-instance mappings differ between switches, MSTP…
Question
Refer to the exhibit. Acme Corp has VM workload running from ToR-1, and has noticed performance degradation. They suspect ToR-1 uplinks are periodically overutilized. List valid reasons why ToR-1 uplinks are being overutilized based on the diagram. (Choose two.)
Exhibit
Options
- AThe customer has used the default MSTP region configuration.
- BCore-1 and Core-2 are not running the same firmware.
- CThe VLAN to instance mapping is not the same on all switches.
- DCore-2 has been incorrectly configured as the root bridge.
- EToR-1 uplinks and downlinks are both running spanning-tree port-type admin-network.
How the community answered
(42 responses)- A50% (21)
- B5% (2)
- D14% (6)
- E31% (13)
Explanation
With default MSTP region settings, devices form different regions, so only the CIST participates across them. This removes per-instance load-sharing and pushes all VLANs over a single active uplink, overutilizing it. If VLAN-to-instance mappings differ between switches, MSTP instances don't align end-to-end, so VLANs cannot split paths per instance and converge onto one uplink, causing periodic overutilization.
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