HPE7-A04 · Question #86

How many Aruba 100G QSPF28 LC ER4L 40KM SMF Transceivers are allowed on Aruba CX 8325?

The correct answer is B. Four Transceivers. Option B (Four Transceivers) is correct because the Aruba CX 8325 has a per-switch power budget limitation that restricts the use of high-power 100G QSFP28 ER4L optics - these transceivers draw significantly more power than standard SR4 or LR4 variants, so only four can be…

Designing Data Center Network Architectures

Question

Options

ATwelve Transceivers
BFour Transceivers
CNone
DEight Transceivers

How the community answered

(28 responses)

B
89% (25)
C
4% (1)
D
7% (2)

Explanation

Option B (Four Transceivers) is correct because the Aruba CX 8325 has a per-switch power budget limitation that restricts the use of high-power 100G QSFP28 ER4L optics - these transceivers draw significantly more power than standard SR4 or LR4 variants, so only four can be active simultaneously without exceeding thermal and power thresholds. Options A (Twelve) and D (Eight) are wrong because they exceed the supported limit; those numbers may seem plausible given the switch's 32 QSFP28 ports, but the ER4L's power draw makes those quantities unsupported. Option C (None) is incorrect because the Aruba CX 8325 does support ER4L transceivers - just in a controlled quantity.

Memory tip: Think "ER4L = 4 max" - the "4" in the transceiver's name (4 lanes) can remind you of the 4-transceiver limit on the CX 8325. High-reach optics = high power = low quantity allowed.

Topics

#QSFP28 transceiver limits#CX 8325#SMF optics#hardware constraints

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