• Silver-colored rack-mounted arista dcs-7812r4-fm network switch with grid ports and ventilation slots for 7812 chassis hot-swap
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Arista

Arista DCS-7812R4-FM | 7800R4 Fabric Module for 7812 Chassis, Slots 1-5

DCS-7812R4-FM

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Description

The 7800R4 Fabric Module is a hot-swappable chassis component for the Arista 7812 modular switch in the 7800R4 family. It suits AI/ML and HPC cluster spines, as well as large data centre spine and core deployments that need high-density, non-blocking 100G, 200G, 400G and 800G modular switching.

This module is required in fabric slots 1-5 of the DCS-7812 chassis and interconnects every line card through a cell-based, mid-plane-less design. Fabric modules are always active-active and support graceful degradation. Each module draws a typical 1150 W and a maximum of 1752 W, measured at 25 C ambient with 50% load on all ports. It measures 2.5 x 31.6 x 23.7 in (6.4 x 80.3 x 60.1 cm) and weighs 52.2 lbs (23.7 kg), and the module carries 12 user-serviceable fan modules.

It is designed for the DCS-7812 chassis only and is not interchangeable with the DCS-7816LR4-FM, DCS-7808R4-FM or DCS-7804R4-FM. Fabric slot 6 requires the separate DCS-7812-FCM Fabric Cooling Module. It is used alongside 7800R4 line cards and supervisor modules such as the DCS-7816-SUP1S.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Interconnects all line cards in a non-blocking architecture irrespective of traffic
- Cell-based architecture sprays data across all links for any-port-to-any-port connectivity with no drops
- Always active-active fabric modules provide redundancy and can be hot-swapped
- Graceful degradation keeps the system forwarding if a fabric module is removed
- Individually serviceable fans give flexible and redundant cooling
- Mid-plane-less design gives direct, consistent connectivity from all line cards to all fabric modules

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Model: DCS-7812R4-FM
- Type: Fabric module for modular switch chassis
- Chassis support: DCS-7812, fabric slots 1-5
- Redundancy: Graceful degradation supported
- Hot-swappable: Yes, always active-active
- User-serviceable fans: Yes, 12 fan modules
- Typical power: 1150 W
- Maximum power: 1752 W
- Dimensions (H x W x D): 2.5 x 31.6 x 23.7 in (6.4 x 80.3 x 60.1 cm)
- Weight: 52.2 lbs (23.7 kg)
- Operating temperature: 0 to 40 C (32 to 104 F)
- Storage temperature: -40 to 70 C (-40 to 158 F)
- Host chassis: 12 line card slots, 2 supervisor slots, 6 fabric module slots, 18 PSU slots
- Host chassis maximum throughput: 345 (690 FDX) Tbps

FAQs

Q: Which chassis and slots does this fabric module fit?
A: It fits the Arista DCS-7812 chassis and is required in fabric slots 1-5. It is not interchangeable with the DCS-7816LR4-FM, DCS-7808R4-FM or DCS-7804R4-FM.

Q: What goes in fabric slot 6 of the 7812 chassis?
A: Fabric slot 6 requires the separate DCS-7812-FCM Fabric Cooling Module, not this fabric module.

Q: How much power does the fabric module draw?
A: Typical draw is 1150 W, with a maximum of 1752 W per module. It is powered from the 7812 chassis, which supports up to 18 PSU slots and a 54 kW maximum power budget.

Q: Does it need its own licence?
A: No licence is specified for the fabric module itself. The 7800R4 chassis runs Arista EOS, and feature licensing applies at the system level.

Q: Can it be replaced while the chassis is running?
A: Yes. Fabric modules are hot-swappable and always active-active, and the system supports graceful degradation.

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