In an MX7000, which components are cooled by the rear fans?

Question

Options

• AFabric A, B, and C IOMs only
• BAll compute and storage sleds
• CManagement Modules only
• DFabric A, B, and C IOMs and the Management Modules

• A
  3% (1)
• B
  6% (2)
• C
  3% (1)
• D
  89% (31)

Explanation

Option D is correct because the MX7000 chassis uses a split cooling architecture: the rear fans are specifically dedicated to cooling the Fabric A, B, and C IOMs and the Management Modules, which are all located at the rear of the chassis and share that airflow zone.

Why the distractors are wrong:

• A is incomplete - it correctly identifies the Fabric IOMs but omits the Management Modules, which also sit in the rear and depend on the same rear-fan airflow.
• B is wrong - compute and storage sleds are front-loaded components cooled by the front fans, not the rear fans.
• C is wrong - Management Modules alone is only half the answer; the Fabric IOMs are equally dependent on rear cooling.

Memory tip: Think "rear of the chassis = rear management and fabric" - both the management plane (MMs) and the fabric plane (IOMs A/B/C) live at the back, so rear fans serve them together. If you remember that compute sleds load from the front and are cooled from the front, everything else (management + fabric) logically falls to the rear.

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