300-320 · Question #586
On which type of port is STP disabled?
The correct answer is D. Flexlink. FlexLinks (D) is a Cisco feature that provides a fast-failover uplink redundancy mechanism as an alternative to Spanning Tree Protocol. Because FlexLinks manages its own active/standby link switching independently, STP is explicitly disabled on FlexLink ports to prevent…
Question
On which type of port is STP disabled?
Options
- AEtherchannel
- BP2P Edge
- CPorfast
- DFlexlink
How the community answered
(22 responses)- A5% (1)
- D95% (21)
Explanation
FlexLinks (D) is a Cisco feature that provides a fast-failover uplink redundancy mechanism as an alternative to Spanning Tree Protocol. Because FlexLinks manages its own active/standby link switching independently, STP is explicitly disabled on FlexLink ports to prevent conflicts between the two redundancy mechanisms. PortFast (C) is a common source of confusion - it does NOT disable STP. PortFast simply skips the STP listening and learning states so the port transitions directly to forwarding, but STP BPDUs are still processed and STP remains active on the port. EtherChannel (A) bundles multiple physical links into one logical interface; STP still runs on the EtherChannel logical port. P2P Edge (B) refers to RSTP point-to-point edge ports (similar to PortFast), which also do not disable STP. Only FlexLinks explicitly disables STP on the configured ports.
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