500-601 · Question #23
Which two DMEs are running on a leaf switch? (Choose two.)
The correct answer is C. spine manager F. policy manager. In Cisco ACI's distributed architecture, leaf switches run the Spine Manager (spineM) and Policy Manager (policyM). The Spine Manager handles the leaf's uplink communication and protocol interactions with spine switches, while the Policy Manager is responsible for enforcing…
Question
Options
- Apolicy element
- Bappliance director
- Cspine manager
- Devent manager
- Etopology manager
- Fpolicy manager
How the community answered
(28 responses)- B4% (1)
- C93% (26)
- E4% (1)
Explanation
In Cisco ACI's distributed architecture, leaf switches run the Spine Manager (spineM) and Policy Manager (policyM). The Spine Manager handles the leaf's uplink communication and protocol interactions with spine switches, while the Policy Manager is responsible for enforcing policies directly on the leaf - where data plane enforcement actually occurs.
Why the distractors are wrong:
- A. Policy Element - runs on spine switches, handling policy resolution and distribution, not enforcement
- B. Appliance Director - runs on the APIC, managing APIC cluster connectivity and node registration
- D. Event Manager - runs on the APIC, processing and distributing fabric events
- E. Topology Manager - runs on spine switches, responsible for IS-IS topology discovery across the fabric
Memory tip: Think "Leaves serve policies to spines" - the two DMEs on a leaf are the ones that enforce Policy locally and manage the Spine connection. If a DME sounds like it belongs "above" the leaf (topology, policy resolution) it's on the spine; if it sounds "administrative/central" (appliance, events), it's on the APIC.
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