• Silver-colored rack-mounted arista dcs-7800r4k-36pe-lc 36-port 800gbe osfp line card with ventilation slots
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Arista

Arista DCS-7800R4K-36PE-LC | 7800R4 36-Port 800G OSFP Line Card, TunnelSec, FlexRoute

DCS-7800R4K-36PE-LC

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Description

The Arista 7800R4K 36-port 800G OSFP line card is built for the 7800R4 modular chassis family. It suits data centre spine and leaf designs, accelerated computing and AI compute clusters, service provider core and edge roles, secure internet peering, and encrypted DCI or WAN links.

The card provides 36 x 800G OSFP800 ports, with breakout to as many as 72 x 400G or 288 x 100G interfaces. Throughput is 28.8 Tbps (57.6 Tbps full duplex), backed by a 32 GB port buffer and latency from 3.8 microseconds. This 7800R4K variant adds Enhanced Encryption through TunnelSec, delivering line-rate AES-256-GCM encryption with MACsec, IPsec and VXLANsec on all ports. It also carries FlexRoute Large Scale, scaling to over 5 million routes in hardware, plus large-scale traffic policies. Typical power draw is 921 W, with a maximum of 1125 W.

The line card fits the DCS-7816L, DCS-7812, DCS-7808 and DCS-7804 chassis and requires the matching R4 fabric modules, a fabric cooling module and a supervisor module. It accepts OSFP optics, including 400G and 800G ZR/ZR+ coherent DWDM modules, and runs Arista EOS.

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

Features

- TunnelSec line-rate encryption using AES-256-GCM, supporting IEEE 802.1AE MACsec, IPsec (RFC 4303) and VXLANsec at speeds up to 800G
- FlexRoute technology scaling to over 5 million routes in hardware
- Large-scale Algorithmic ACLs and traffic policies
- Accelerated sFlow for network visibility
- Optimised for high-power 400G and 800G ZR/ZR+ coherent DWDM OSFP modules, with reach up to 120 km
- Non-blocking cell-based fabric architecture with no drops
- Under 4 microsecond latency at 64 bytes
- Runs Arista EOS

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

- Ports: 36 x 800G OSFP800
- Breakout: up to 72 x 400G or 288 x 100G
- Max 100G interfaces: 288
- Max 400G interfaces: 72
- Max 800G interfaces: 36
- Throughput (full duplex): 28.8 Tbps (57.6 Tbps)
- Latency: from 3.8 microseconds
- Port buffer: 32 GB
- Encryption: TunnelSec on all ports (MACsec, IPsec, VXLANsec)
- FlexRoute: Large Scale
- Traffic policies: Large Scale
- Accelerated sFlow: Yes
- Typical power: 921 W
- Maximum power: 1125 W
- Dimensions (W x H x D): 48.1 x 5.4 x 45.2 cm
- Weight: 12.1 kg
- Operating temperature: 0 to 40 C
- Storage temperature: -40 to 70 C
- Relative humidity: 5 to 90%
- Operating altitude: 0 to 3,000 m
- Chassis support: DCS-7816L, DCS-7812, DCS-7808, DCS-7804

FAQs

Q: Which chassis does this line card fit?
A: It fits the Arista DCS-7816L, DCS-7812, DCS-7808 and DCS-7804 chassis.

Q: What else does the chassis need to run this card?
A: The chassis needs the matching R4 fabric modules (DCS-7804R4-FM, DCS-7808R4-FM, DCS-7812R4-FM or DCS-7816LR4-FM), a fabric cooling module and a supervisor module (Supervisor1, 1S, 1A or 2).

Q: Does the encryption need a licence?
A: Encryption is an EOS licensed feature and requires a licence file to enable it.

Q: What optics does it accept?
A: It accepts OSFP optics, including 400G and 800G ZR/ZR+ modules, and supports breakout to 400G and 100G interfaces.

Q: How does this card differ from the standard 7800R4-36PE?
A: The 7800R4K variant adds TunnelSec line-rate encryption on all ports plus FlexRoute Large Scale and large-scale traffic policy capacity.

Q: How much power does the card draw?
A: Typical draw is 921 W and the maximum is 1125 W, measured at 25 C ambient with 50% load on all ports and excluding optics. Power comes from the chassis PSUs.

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