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FAQ

How do I connect networking cables based on my host board combination on CS?

Please refer to the illustrations below. Depending on your host board combination, there are specific ways to connect cables to front-end and internal networks.

New “cross-host board” configurations

From firmware v. 142Z12 onwards, please use a “cross-host board” configuration when there are two host boards installed, as illustrated in Combinations 5(b) and 6(b) below. These new configurations can enhance system performance on models using SSDs.

Important!
  • To use a cross-host board configuration, you need to re-deploy the cluster if you are upgrading from an earlier version of firmware to v. 142Z12 (or later). If you do NOT plan to re-deploy the cluster after upgrading the firmware, use Combinations 5(a), 6(a), 7(a), and 8(a).
  • After you upgrade to v. 142Z12 (or later) AND re-deploy the cluster, you must use a cross-host board configuration (if there are two host boards installed).
  • Do NOT use different types of host boards on the same appliance. Install host boards of the same type (e.g. two 25GbE x 2).
  • 40GbE host board has been discontinued (EOL) since December 31, 2022.

Combination 1

  • Front-end: Onboard 10GbE x 2 (CH0 + CH1)
  • Internal: Onboard 10GbE x 2 (CH2 + CH3)

Combination 2

When using only one host board, install it in the left (HB1) slot.

  • Front-end: Onboard 10GbE x 4 (CH0 ~ CH3)
  • Internal: Host board 25GbE x 2 (CH4 + CH5)

Combination 3

When using only one host board, install it in the left (HB1) slot.

  • Front-end: Onboard 10GbE x 4 (CH0 ~ CH3) + host board 25GbE x 2 (CH6 + CH7)
  • Internal: Host board 25GbE x 2 (CH4 + CH5)

Combination 4

When using only one host board, install it in the left (HB1) slot.

  • Front-end: Onboard 10GbE x 4 (CH0 ~ CH3)
  • Internal: Host board 40GbE x 2 (CH4 + CH5)

Note:

40GbE host board has been discontinued (EOL) since December 31, 2022.

See also:
Can I add or remove a host board after completing deployment if only one host board has been installed?

Combination 5

5(a) Basic
  • Front-end: Host board 25GbE x 2 (CH8 + CH9)
  • Internal: Host board 25GbE x 2 (CH4 + CH5)

5(b) Cross-host board

This configuration applies to firmware v. 142Z12 and later (re-deployment required).

  • Front-end: Host board 25GbE x 2 (CH5 + CH9)
  • Internal: Host board 25GbE x 2 (CH4 + CH8)

Combination 6

6(a) Basic
  • Front-end: Host board 40GbE x 2 (CH8 + CH9)
  • Internal: Host board 40GbE x 2 (CH4 + CH5)

6(b) Cross-host board

This configuration applies to firmware v. 142Z12 and later (re-deployment required).

  • Front-end: Host board 40GbE x 2 (CH5 + CH9)
  • Internal: Host board 40GbE x 2 (CH4 + CH8)

Note:

40GbE host board has been discontinued (EOL) since December 31, 2022.

Combination 7

7(a) Basic
  • Front-end: Onboard 10GbE x 4 (CH0 ~ CH3)+ host board 25GbE x 2 (CH8 + CH9)
  • Internal: Host board 25GbE x 2 (CH4 + CH5)

7(b) Cross-host board

This configuration applies to firmware v. 142Z12and later (re-deployment required).

  • Front-end: Onboard 10GbE x 4 (CH0 ~ CH3) + host board 25GbE x 2 (CH5 + CH9)
  • Internal: Host board 25GbE x 2 (CH4 + CH8)

Combination 8

8(a) Basic
  • Front-end: Onboard 10GbE x 4 (CH0 ~ CH3)+ host board 40GbE x 2 (CH8 + CH9)
  • Internal: Host board 40GbE x 2 (CH4 + CH5)

8(b) Cross-host board

This configuration applies to firmware v. 142Z12and later (re-deployment required). It helps deliver the fast speed of U.2 SSDs on CS U.2 models.

  • Front-end: Onboard 10GbE x 4 (CH0 ~ CH3) + host board 40GbE x 2 (CH5 + CH9)
  • Internal: Host board 40GbE x 2 (CH4 + CH8)

Note:

40GbE host board has been discontinued (EOL) since December 31, 2022.

Created Date: 09/30/2025