Drag and Drop Question Drag and drop the failures from the left onto the responsible devices in the MDS field-replaceable unit on the right. Answer:

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Explanation

MDS Chassis FRU Placement Explanation

This question maps Cisco MDS 9000-series (likely the MDS 9507, a 7-slot chassis) field-replaceable units to their physical positions on a chassis diagram. The numbered positions (1–5) represent labeled locations on the chassis, ordered roughly top-to-bottom or by functional grouping.

Item-by-Item Breakdown

1. Power Supply Modules → Position 1 Power supply bays occupy a dedicated section of the chassis, physically separate from the module slots. They appear first in the diagram because they are infrastructure-level components that must be identified independently of switching hardware. Common mistake: assuming power supplies are "inside" the slot numbering - they are not; they have their own bays.

2. Fan Tray Assembly → Position 2 The fan tray is likewise a standalone FRU adjacent to the power supplies. It sits outside the numbered module slots. Fans and PSUs are grouped together in diagrams because they are the two non-slot infrastructure FRUs. Mistake: placing the fan tray among the line card slots.

3. Line Card Slots 1 and 2 → Position 3 In the MDS 9507, slots 1 and 2 are the upper line card slots. Line cards occupy all non-supervisor slots (1, 2, 5, 6, 7). Slots 1–2 come before the supervisor slot range, so they appear above the supervisor modules in the physical layout.

4. Supervisor Modules → Position 4 Slots 3 and 4 are reserved exclusively for supervisor engines in the MDS 9507. They occupy the center of the chassis. This is a critical design point - supervisors cannot be placed in line card slots and vice versa. Mistake: thinking supervisors go at the top; they are in the center to allow symmetric cooling and access.

5. Line Card Slots 5, 6, and 7 → Position 5 These are the lower line card slots, below the supervisor modules. There are three of them (vs. two above), giving the MDS 9507 its 5 line card + 2 supervisor = 7-slot layout.

Key Takeaways

Most common misconception: Students often place supervisor modules at position 1 (top), assuming they're the "most important" component. In the MDS 9507, supervisors are physically centered, flanked by line card slots above and below.

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