350-501 · Question #471
350-501 Question #471: Real Exam Question with Answer & Explanation
The correct answer is D: Group Ethernet interfaces with mode desirable under the physical interfaces.. “Desirable” mode is for PAgP, Cisco’s proprietary aggregation protocol. If one side is set to desirable and the other to auto (or desirable), the EtherChannel forms Spanning Tree Protocol (STP) will treat the bundle as one logical link, so no ports are blocked.
Question
Company A must increase throughput between two non-IEEE 802.3ad switches located in the access and distribution layers. A network engineer must create a link group with the same speed and duplex. The STP protocol must not block any of the group ports. Which action completes the implementation?
Options
- ABundle the physical interfaces with mode lacp configured on each of them.
- BEnable Port Aggregation Protocol with mode auto under the logical group interface.
- CConfigure a group logical interface with mode active enabled.
- DGroup Ethernet interfaces with mode desirable under the physical interfaces.
Explanation
“Desirable” mode is for PAgP, Cisco’s proprietary aggregation protocol. If one side is set to desirable and the other to auto (or desirable), the EtherChannel forms Spanning Tree Protocol (STP) will treat the bundle as one logical link, so no ports are blocked.
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