N9K-X9732C-FX – 32x100G QSFP28 – NX-OS MACSec – N+1 Fabric Redundancy

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N9K-X9732C-FX Description

The N9K-X9732C-FX is a Cisco Nexus 9500 Series cloud-scale line card for 100G aggregation in Nexus 9504, Nexus 9508 and Nexus 9516 data center chassis. The card has 32 100G QSFP28 ports, 6.4 Tbps of performance, a 160 MB packet buffer and MACSec support. It runs in NX-OS mode only, not as an ACI spine, and N+1 fabric module redundancy takes five fabric modules with no other line card type in the chassis.

Quick Specs

Parameter

Specification

Product ID

N9K-X9732C-FX

Product type

Cloud-scale 100G line card

Supported chassis

Cisco Nexus 9504, Nexus 9508, Nexus 9516

Total ports

32 x 100G Ethernet

Port form factor

QSFP28

Breakout capability

1x100G, 2x50G, 1x40G, 4x25G, 4x10G, 1×1/10G

Cisco NX-OS support

Yes

Cisco ACI spine support

No

MACSec support

Yes

N+1 fabric module redundancy

Yes

Fabric modules for maximum bandwidth

4

Performance and power

6.4 Tbps, 2.16 bpps, 520 W typical, 840 W maximum

Application Scenarios

NX-OS 100G Aggregation

A Nexus 9500 chassis running NX-OS aggregates 100G links from leaf switches on the 32 QSFP28 ports of the card. Four fabric modules give full bandwidth, and a fifth adds N+1 redundancy.

Encrypted Hall-To-Hall Links

Where links between data center halls or buildings must be encrypted, the card applies MACSec on its 100G QSFP28 ports. The chassis then stays in NX-OS mode, since the card is not an ACI spine.

Product Comparison

Parameter

N9K-X9732C-FX

N9K-X9732C-EX

N9K-X9736C-FX

N9K-X9788TC-FX

Ports

32 x 100G QSFP28

32 x 100G QSFP28

36 x 100G QSFP28

48 x 100M/1G/10G BASE-T + 4 x 40/100G QSFP28

Cisco ACI spine support

No

Yes

Yes

No

MACSec support

Yes

No

Yes

Yes

N+1 fabric module redundancy

Yes (5 fabric modules)

No

No

No

FM required for maximum bandwidth

4

4

5

4

Performance

6.4 Tbps

6.4 Tbps

7.2 Tbps

1.76 Tbps

N9K-X9732C-FX is the 32-port 100G line card with MACSec and N+1 fabric module redundancy, while N9K-X9732C-EX has the same QSFP28 ports and 6.4 Tbps but is the one listed for ACI spine and has neither MACSec nor N+1, so ACI spine fabrics must order N9K-X9732C-EX. N+1 redundancy takes five fabric modules instead of four, and Cisco notes the chassis must hold only N9K-X9732C-FX line cards to get it. N9K-X9736C-FX offers 36 ports and 7.2 Tbps with MACSec and ACI spine support, but needs five fabric modules for full bandwidth and has no N+1. Copper 1/10G designs move to N9K-X9788TC-FX, which pairs 48 BaseT ports with four 40/100G QSFP28 ports at 1.76 Tbps.

Ordering Checklist

  • Host chassis: Install the card in a Nexus 9504, Nexus 9508 or Nexus 9516; the hardware guides for all three list N9K-X9732C-FX as a supported line card. It installs only in these Nexus 9500 chassis and is not a standalone switch.
  • Fabric modules: Order four FM-E, FM-E2 or FM-G fabric modules for maximum bandwidth, or five for N+1 redundancy, with only N9K-X9732C-FX line cards in the chassis. Four fabric modules give full bandwidth but no N+1, and a chassis mixed with other line cards cannot reach N+1 with five.

Specifications

Parameter Specification Parameter Specification
Product ID N9K-X9732C-FX Product type Cloud-scale 100G line card
Cisco ordering description Cisco Nexus 9500 32p 100G QSFP cloud-scale line card Spare part format N9K-X9732C-FX=
Supported chassis Cisco Nexus 9504, Nexus 9508, Nexus 9516 Line-card slots by chassis 4, 8, or 16 line-card slots depending on chassis
Total ports 32 x 100G Ethernet Port form factor QSFP28
Breakout capability 1x100G, 2x50G, 1x40G, 4x25G, 4x10G, 1×1/10G Cisco NX-OS support Yes
Cisco ACI spine support No MACSec support Yes
N+1 fabric module redundancy Yes Fabric modules for maximum bandwidth 4
Fabric modules for N+1 redundancy 5 Line-card ASIC Four Cisco LS1800FX ASIC instances
Performance 6.4 Tbps Forwarding rate 2.16 bpps
Packet buffer 160 MB Weight 6.8 kg (15 lb)
Typical power consumption 520 W Maximum power consumption 840 W
MTBF 429,090 hours Hot-swappable Yes
Airflow Port-side intake FEX support in NX-OS mode No

Quality Certifications

Customer Reviews

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    Ravi Diaz
    Posted on 22/04/2026
    Verified Buyer
    5.0

    We did our homework before ordering. Layer23 checked out on every front.

    Janet Howard
    Posted on 07/03/2026
    Verified Buyer
    4.0

    Our org has strict vendor qualification criteria. Layer23 passed without issue. Invoice formatting was a bit different from what our AP system expects, but workable.

    Amy Crawford
    Posted on 15/01/2026
    Verified Buyer
    4.0

    Clear labeling on the outer box made it easy for our receiving team. Took a little longer to clear customs than expected, otherwise excellent.

Questions & Answers

  • Which Nexus 9500 chassis accept N9K-X9732C-FX?

    N9K-X9732C-FX installs in Nexus 9504, Nexus 9508 and Nexus 9516 chassis, and the hardware guides for all three list the card. Four fabric modules give maximum bandwidth, and N+1 redundancy takes five fabric modules with only N9K-X9732C-FX line cards in the chassis.
  • How much does an N9K-X9732C-FX line card weigh?

    An N9K-X9732C-FX weighs 15.0 lb (6.8 kg), per the Nexus 9504 hardware installation guide system specifications. Plan two-person handling when seating the card in a Nexus 9500 chassis.
  • Does N9K-X9732C-FX support FEX in NX-OS mode?

    No, N9K-X9732C-FX does not support FEX in NX-OS mode, so fabric extenders cannot be attached to its QSFP28 ports. The card carries four Cisco LS1800FX ASIC instances behind the front-panel ports.
  • What MTBF is listed for N9K-X9732C-FX, and is the card hot swappable?

    N9K-X9732C-FX is listed with an MTBF of 429,090 hours. The card is hot swappable and draws air port-side intake, so a failed card can be exchanged in a running chassis.
  • How many fabric modules give N+1 redundancy with N9K-X9732C-FX?

    Five fabric modules give N+1 redundancy with N9K-X9732C-FX, against four for full bandwidth. The chassis must hold only N9K-X9732C-FX line cards, since any other line card type removes N+1.

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DataSheet Downloads

  • N9K-X9732C-FX Datasheet