• Silver-colored Arista DCS-7800R3A-36D-LC rack-mounted 36-port 400GbE QSFP-DD line card with ventilation slots
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Arista

Arista DCS-7800R3A-36D-LC | 7800R3A 36-Port 400G QSFP-DD Line Card, 16GB Buffer

DCS-7800R3A-36D-LC

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Description

The 7800R3A 36-port 400GbE QSFP-DD line card is built for the Arista 7800R3 Series modular chassis. It suits cloud-scale data centre spine and core, internet edge, peering and backbone routing roles, as well as 400ZR DCI links when paired with Arista's ZR Line System.

Each card provides 36 x 400GbE QSFP-DD ports with 14.4 Tbps of throughput (28.8 Tbps FDX) and 16 GB of port buffer. Breakout modes allow up to 144 x 100G ports, or up to 232 interfaces at 10G, 25G or 50G using optics or cables. This QSFP-DD variant has no MACsec or TunnelSec encryption and no on-card CPU. Typical power draw is 533 W, with a maximum of 749 W, supplied by the host chassis.

The card installs in the Arista 7804, 7808, 7812, 7816 and 7816L chassis and can be mixed with other line cards. It accepts QSFP-DD, QSFP28 and QSFP+ optics and cables, including 400G ZR/ZR+ and breakout cables. It runs on the Arista EOS software of the host chassis.

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

Features

- Wire-speed L2/L3 forwarding with a distributed virtual output queue architecture and lossless fabric
- Non-blocking full-mesh connection to the fabric modules
- FlexRoute, Accelerated sFlow and large-scale algorithmic ACLs
- Per-port speed changes and breakout modes (10G, 25G, 50G, 100G) with optics or cables
- Optimised for high-power 400ZR OSFP and QSFP-DD coherent optics, for use with Arista's ZR Line System
- Runs Arista EOS with CloudVision, ZTP, LANZ/DANZ, INT and IEEE 1588 PTP support
- Hot-swappable in chassis with redundant supervisors, fabric, power and cooling

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: 36x QSFP-DD
- Max 400G ports: 36
- Max 100G ports: 144
- Max 50G ports: 232
- Max 25G ports: 232
- Max 10G ports: 232
- Max 40G ports (using QSFP+): 36
- Max total interfaces: 232
- Throughput (FDX): 14.4 Tbps (28.8 Tbps)
- Port buffer: 16 GB
- Encryption: No
- Typical (max) power: 533 W (749 W)
- Dimensions (W x H x D): 18.9 x 2.1 x 17.8 in (48.1 x 5.4 x 45.2 cm)
- Weight: 11.66 kg (25.7 lbs)
- Operating temperature: 0 to 40 C (32 to 104 F)
- Storage temperature: -40 to 70 C (-40 to 158 F)
- Relative humidity: 5 to 90%
- Chassis support: DCS-7816L, DCS-7816, DCS-7812, DCS-7808, DCS-7804

FAQs

Q: Does this line card need a separate software licence?
A: The line card runs on the Arista EOS software of the host chassis. This variant has no hardware encryption, as encryption is a licensed EOS feature on the -36DM variants.

Q: Which chassis does it install in?
A: It installs in the Arista 7804, 7808, 7812, 7816 and 7816L chassis, which can be populated with any combination of line cards.

Q: How much power does the card draw?
A: Typical draw is 533 W and maximum is 749 W, measured at 25 C with 50% load on all ports and excluding optics power. Power comes from the host chassis, which takes 3000 W AC or DC power supplies with 1+1 redundancy.

Q: Which optics and breakout options are supported?
A: It supports QSFP-DD, QSFP28 and QSFP+ optics and cables, including 400G ZR/ZR+ and breakout cables. The minimum EOS release for each optic is listed on Arista's transceiver compatibility matrix.

Q: How does this SKU differ from the -36DM variants?
A: This SKU has no MACsec or TunnelSec encryption and no on-card CPU. It is the 16 GB buffer version, while the -36DM variants add hardware encryption that needs a licence file.

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