HPE7-A12Demo

By HP · Question Mode

QuestionQ24

Architect the solution

A customer is upgrading its data-center structured cabling to SMF. At the same time, the customer wants to upgrade the spine switches in its spine-and-leaf topology. A key objective of this upgrade is to eventually support 400GbE leaf-to-spine links. However, for some time, many leaf switches will continue to support 100GbE uplinks.

What is a valid recommendation for the spine switches?

  • A CX 9300-32D switches using 400G QSFP-DD MPO-16 transceivers
  • B CX 9300-32D switches using 4x100G DR QSFP-DD transceivers
  • C CX 10040 switches using 400G QSFP-DD MPO-16 transceivers
  • D CX 10040 switches using 4x100G DR QSFP-DD transceivers
Explanation

The CX 9300-32D provides 400GbE QSFP-DD spine ports and can use 400G eDR4 optics over single-mode fiber. Each eDR4 port uses four 100GbE PAM4 optical lanes and can be split into four 100GbE links for existing leaf switches, while retaining a migration path to 400GbE links. MPO-16 SR8 optics are intended for multimode fiber rather than SMF.

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