• Gray metal back server rack of arista dcs-7800r3ak-36dm2-lc 7800r3 36-port 400gbe line card with black ventilation slots
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Arista

Arista DCS-7800R3AK-36DM2-LC | 7800R3 36-Port 400G QSFP-DD Line Card, MACsec, CPU

DCS-7800R3AK-36DM2-LC

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Description

The Arista DCS-7800R3AK-36DM2-LC is a 36-port 400GbE QSFP-DD line card for the 7800R3 series modular data centre switch chassis. It suits large-scale spine and leaf fabrics, Internet peering, secure data centre interconnect and carrier edge and core roles where wire-speed encryption and deep buffering matter.

The card provides 36x QSFP-DD ports with 14.4 Tbps throughput (28.8 Tbps FDX) and 16 GB of port buffer. Breakout support reaches up to 144x 100G or 232x 10G/25G/50G interfaces. It is the large-routes (K) variant with an onboard CPU, and TunnelSec encryption (MACsec, IPsec and VXLANsec) is available on all ports. Typical power draw is 608 W, with a maximum of 824 W, excluding optics. It runs Arista EOS, and enabling encryption requires a licence file.

The line card fits DCS-7816L, DCS-7816, DCS-7812, DCS-7808 and DCS-7804 chassis. The QSFP-DD ports accept 400G cables and optics including CR8, AOC, SR8, DR4, XDR4, FR4, LR4, PLR4 and ZR, as well as 200G, 100G, 50G and 25G breakout options and QSFP+ at 40G.

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

Features

- Fully scheduled lossless architecture with cell-spraying fabric and per-port Virtual Output Queuing
- Deep packet buffering with 16 GB on this line card
- TunnelSec line-rate AES-256-GCM encryption using MACsec (IEEE 802.1AE), IPsec and VXLANsec from 10G to 400G
- Large route scale (K variant) for Internet peering and secure data centre interconnect
- Onboard CPU on the 2 variant of the 7800R3A line cards
- EVPN, VXLAN, MPLS, Segment Routing and carrier-grade services
- Arista EOS with CloudVision, LANZ, ZTP, sFlow and IEEE 1588 PTP
- Hot-swappable modular design with front-to-rear airflow

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 400GbE QSFP-DD
- Throughput: 14.4 Tbps (28.8 Tbps FDX)
- Port buffer: 16 GB
- Maximum 400G interfaces: 36
- Maximum 100G interfaces: 144
- Maximum 50G interfaces: 232
- Maximum 25G interfaces: 232
- Maximum 10G interfaces: 232
- Maximum 40G interfaces (using QSFP+): 36
- Maximum total interfaces: 232
- Encryption: TunnelSec on all ports
- Typical power: 608 W
- Maximum power: 824 W
- Dimensions (W x H x D): 48.1 x 5.4 x 45.2 cm (18.9 x 2.1 x 17.8 in)
- Weight: 11.73 kg (25.85 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%
- Operating altitude: 0 to 3,000 m (0 to 10,000 ft)
- Chassis support: DCS-7816L, DCS-7816, DCS-7812, DCS-7808, DCS-7804

FAQs

Q: Does this line card need a licence for encryption?
A: Yes. TunnelSec and MACsec are EOS licensed features and need a licence file to enable them. The datasheet lists chassis licences such as LIC-MOD-x-MACSEC and LIC-MOD-x-ENCR, where x is the 4-, 8-, 12- or 16-slot chassis size.

Q: Which chassis does it fit?
A: It is supported in the DCS-7816L, DCS-7816, DCS-7812, DCS-7808 and DCS-7804 chassis.

Q: How much power does the line card draw?
A: Typical draw is 608 W and the maximum is 824 W, measured at 25 C ambient with 50% load on all ports and excluding optics. The chassis power supplies feed the card.

Q: Which optics and cables work in the QSFP-DD ports?
A: The ports accept 400GBASE-CR8, AOC, SR8, DR4, XDR4, FR4, LR4, PLR4 and ZR optics and cables. They also support 200G, 100G, 50G and 25G breakout cables and optics, and QSFP+ at 40G.

Q: What does the K and CPU in this model mean?
A: K denotes the large-routes variant, which provides the larger forwarding table for Internet peering and secure interconnect. The 2 variant adds an onboard CPU to the line card.

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