N9K-C9508-B3-E – Nexus 9508 8-Slot Chassis – 4xFM-E Bundle – 13RU
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N9K-C9508-B3-E Description
N9K-C9508-B3-E is a Cisco Nexus 9500 Series modular switch chassis bundle for data center spine, aggregation, and high-density fabric deployments, built on the Nexus 9508 8-slot platform with support for up to eight line cards. This B3-E bundle includes one supervisor, three power supplies, two system controllers, four N9K-C9508-FM-E fabric modules, and three fan trays, and the FM-E fabric path is specified by Cisco at 800 Gbps per slot with 100 Gbps maximum flow size for supported cloud-scale line-card designs in Cisco ACI or Cisco NX-OS environments.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
SKU |
N9K-C9508-B3-E |
|
Product type |
Nexus 9508 chassis bundle |
|
Base chassis |
Cisco Nexus 9508 |
|
Form factor |
13RU modular chassis |
|
Line card slots |
Up to 8 |
|
Included supervisor modules |
1 |
|
Included power supplies |
3 |
|
Included system controllers |
2 |
|
Included fabric modules |
4 x N9K-C9508-FM-E |
|
Included fan trays |
3 |
|
Fabric module capacity |
800 Gbps per line-card slot |
|
Line cards |
Selected separately |
Product Performance
Key Features
N9K-C9508-B3-E starts the BOM with the larger 9508 chassis instead of the 4-slot Nexus 9504, giving planners more line-card room before they choose the port mix.
The bundle includes four N9K-C9508-FM-E modules, which keeps the quote focused on the FM-E fabric path instead of a bare chassis plus separately sourced fabric cards.
One supervisor, three power supplies, two system controllers, and three fan trays are part of the SKU, so the buyer can separate chassis infrastructure from line-card and optics decisions.
Cisco lists N9K-C9508-FM-E support for selected Nexus 9500 EX and FX line cards in ACI spine or NX-OS contexts, so the line-card shortlist should be checked against the chosen operating mode.
For four fabric modules, Cisco specifies FM2, FM3, FM4, and FM6 placement; procurement should not treat the fabric count as complete without the installation slot plan.
The Nexus 9508 chassis uses up to eight power-supply slots and occupies 13RU, making power redundancy mode, rack clearance, and lifting plan real quote checks.
Application Scenarios
Use N9K-C9508-B3-E when the design needs the 8-slot Nexus 9508 chassis and engineering will finish the port count through separate Nexus 9500 line cards. This keeps the chassis bundle clear while the optics and cabling list is still being finalized.
Choose this SKU when the project is moving toward selected 100G EX or FX line-card options that Cisco documents with N9K-C9508-FM-E support. The buyer should verify the actual line-card model and whether the design is Cisco ACI spine or Cisco NX-OS.
N9K-C9508-B3-E fits a BOM that needs the same FM-E bundle direction as a 9504 B3-E order but cannot stay within four line-card slots. The procurement check is chassis size, rack space, fabric type, and line-card compatibility.
Product Comparison
|
Parameter |
N9K-C9508-B3-E |
N9K-C9508-B3-S |
N9K-C9508-B3 |
N9K-C9516-B3-E |
|---|---|---|---|---|
|
Base chassis |
Nexus 9508 |
Nexus 9508 |
Nexus 9508 |
Nexus 9516 |
|
Line card slots |
8 |
8 |
8 |
16 |
|
Chassis height |
13RU |
13RU |
13RU |
21RU |
|
Included supervisor modules |
1 |
1 |
1 |
1 |
|
Included power supplies |
3 |
3 |
3 |
3 |
|
Included system controllers |
2 |
2 |
2 |
2 |
|
Included fabric modules |
4 FM-E |
4 FM-S |
4 FM |
4 FM-E |
|
Included fan trays |
3 |
3 |
3 |
3 |
|
Fabric module path |
N9K-C9508-FM-E |
N9K-C9508-FM-S |
N9K-C9508-FM |
N9K-C9516-FM-E |
|
Fabric module description |
8-slot 800Gbps cloud-scale fabric module |
8-slot FM-S fabric module |
8-slot fabric module |
16-slot 800Gbps cloud-scale fabric module |
- In a N9K-C9508-B3-E vs N9K-C9508-B3-S comparison, the difference is the FM-E fabric path versus the FM-S fabric path, so the fabric module requirement should match the selected line cards and operating mode.
- The N9K-C9508-B3-E difference from N9K-C9508-B3 is the FM-E bundle scope; both use the Nexus 9508 chassis, but the fabric module type is not the same.
- For N9K-C9508-B3-E vs N9K-C9516-B3-E, the choice is mainly 8 line-card slots in a 13RU chassis versus 16 line-card slots in a 21RU chassis.
- In a N9K-C9508-B3-E vs N9K-C9504-B3-E comparison, the 9508 bundle keeps the FM-E direction but doubles the line-card slot ceiling from 4 to 8.
Selection Guide
1. Choose N9K-C9508-B3-E for an 8-slot FM-E bundle
Select N9K-C9508-B3-E when the bill of materials needs a Nexus 9508 chassis package with four FM-E fabric modules already included and the final port count will be defined by separate line cards.
2. Move away from this SKU if FM-S or classic FM is required
Use an FM-S or non-E bundle only when the Cisco-documented line-card plan calls for that fabric module type. Do not treat the B3-E, B3-S, and B3 bundle names as interchangeable.
3. Check whether the 9508 size is enough
The 9508 chassis gives up to eight line-card slots. If the design needs more physical line-card capacity, compare N9K-C9516-B3-E before releasing the purchase order.
4. Finish the hardware plan around fabric, power, and media
Confirm FM2, FM3, FM4, and FM6 placement for four fabric modules, power redundancy mode, fan tray type, rack space, line-card models, transceivers, and cables before the quote is finalized.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Exact bundle identity |
N9K-C9508-B3-E with 1 supervisor, 3 power supplies, 2 system controllers, 4 FM-E modules, and 3 fan trays |
Prevents confusion with bare chassis, FM-S bundle, or non-E B3 bundle |
|
Line cards |
Exact Nexus 9500 line-card models and quantities |
The chassis bundle does not define final port count or port speed |
|
Fabric compatibility |
N9K-C9508-FM-E support for the chosen EX or FX line cards |
Fabric type controls whether the selected line cards are a supported fit |
|
Fabric slots |
Four FM-E modules placed in FM2, FM3, FM4, and FM6 |
Cisco documents specific slot placement for fabric modules |
|
Operating mode |
Cisco ACI spine or Cisco NX-OS mode for the selected line cards |
Compatibility entries can differ by operating mode |
|
Power plan |
Installed power supply type, redundancy mode, input source, and power cords |
The bundle includes 3 power supplies but site power design still has to be validated |
|
Rack and handling |
13RU rack space, chassis depth, rail kit, grounding, and lifting plan |
Nexus 9508 installation requires planned data center space and handling |
|
Media list |
Optics, DACs, AOCs, fiber type, and cable quantities |
Line cards, optics, and cables are separate from the chassis bundle |
Optional Add-ons
|
Model |
Description |
|---|---|
|
N9K-C9508-FM-E |
Cisco Nexus 9500 8-slot 800Gbps cloud-scale fabric module |
|
N9K-C9508-FM-CV |
Fabric module slot cover for non-FM-G empty fabric slots |
|
N9K-C9508-FAN |
Fan tray for Cisco Nexus 9508 chassis |
|
N9K-PAC-3000W-B |
Cisco Nexus 9500 3000W AC power supply, port-side intake |
|
N9K-PUV-3000W-B |
Cisco Nexus 9500 3000W universal AC/DC power supply, port-side intake |
|
N9K-PDC-3000W-B |
Cisco Nexus 9500 3000W DC power supply, port-side intake |
|
N9K-C9500-RMK |
Cisco Nexus 9500 rack mount kit for Nexus 9508 and Nexus 9516 chassis |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| SKU | N9K-C9508-B3-E | Product type | Nexus 9508 chassis bundle |
| Base chassis | N9K-C9508 | Chassis description | Cisco Nexus 9508 chassis with 8 line-card slots |
| Rack units | 13RU | Line card slots | Up to 8 |
| Power supply slots | Up to 8 | Included supervisor modules | 1 |
| Power supply selection | N9K-PAC-3000W-B 3000W AC, N9K-PDC-3000W-B 3000W DC, N9K-PUV-3000W-B 3000W universal, or N9K-PUV2-3000W-B 3000W dual-input universal selected for the three included power-supply positions | Included system controllers | 2 |
| Included fabric modules | 4 x FM-E | Included fan trays | 3 |
| Fabric module part number | N9K-C9508-FM-E | Fabric module description | Cisco Nexus 9500 8-slot 800Gbps cloud-scale fabric module |
| Maximum flow size | 100 Gbps | N9K-C9508-FM-E total capacity | 6400 Gbps |
| N9K-C9508-FM-E capacity per slot | 800 Gbps | N9K-C9508-FM-E typical power | 455 W |
| N9K-C9508-FM-E maximum power | 570 W | N9K-C9508-FM-E MTBF | 653420 hours |
| N9K-C9508-FM-E hot swappable | Yes | N9K-C9508-FM-E airflow | Port-side intake |
| Compatible fan tray | N9K-C9508-FAN | Fabric slot rule for four modules | FM2, FM3, FM4, and FM6 |
| Same-type fabric rule | All fabric modules in the chassis must be the same type | Supported line-card examples | N9K-X97160YC-EX, N9K-X9732C-EX, N9K-X9732C-FX, N9K-X9736C-EX, N9K-X9736C-FX, N9K-X9788TC-FX |
| Line-card ordering | Selected separately | Chassis width | 17.5 in (44.5 cm) |
| Chassis depth | 31.76 in (80.67 cm) | Chassis height | 22.70 in (57.78 cm) |
| Chassis weight | 150.0 lb (68.2 kg) | Operating temperature | 32 to 104F (0 to 40C) |
| Nonoperating temperature | -40 to 158F (-40 to 70C) | Relative humidity | 5 to 95% noncondensing |
| Operating altitude | 0 to 13123 ft (0 to 4000 m) | Supported AC power supply | N9K-PAC-3000W-B |
| Supported universal power supply | N9K-PUV-3000W-B | Supported DC power supply | N9K-PDC-3000W-B |
| Supported dual-input universal power supply | N9K-PUV2-3000W-B | Power redundancy modes | Combined, n+1, and n+n |
| Optics and cables | Selected by line-card compatibility | Warranty | 1-year limited hardware warranty |
| RoHS compliance | RoHS-6 compliant with documented exceptions |
Get More Information
Need pricing, stock, or shipping details for the N9K-C9508-B3-E ? Layer23-Switch can help you check current availability, lead time, and delivery options for this. Send us the part number, quantity, and destination country via live chat or email sales@layer23-switch.com for a fast quotation.
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