Arista DCS-DL-7700R4C-38PE-B-F | 7700R4 18x 800G OSFP Leaf Switch, B Series, Sup-EL, Front-to-Rear

SKU:DCS-DL-7700R4C-38PE-B-F

Stock Status: Enquire

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Description

The Arista 7700R4C-38PE is a 2RU distributed leaf switch for the 7700R4 Distributed Etherlink Switch system. It is built for large-scale, lossless back-end networks for generative AI training, ML and HPC clusters, and sits at the leaf layer of a 2-tier leaf-spine fabric with 7720R4 spine switches. Typically up to 16 accelerators connect to each leaf, with the remaining host ports used for storage or inter-cluster links.

This B Series model with the 7001-SUP-EL supervisor provides 18 x 800GbE OSFP800 host-facing ports and 20 x 800GbE OSFP800 fabric ports toward the spines, plus one QSFP100 port. Forwarding capacity is 14.4 Tbps (28.8 Tbps FDX) at 5.4 Bpps, with 16 GB of packet buffer and end-to-end latency from 3.8 us. Airflow is front-to-rear, with two hot-swap 2400W AC power supplies in 1+1 redundancy and two SAF-D power cords, and four hot-swap fans in N+1 redundancy. Typical draw is 593 W, excluding optics. The EOS feature licence listed for this platform is LIC-DL.

The 7001-SUP-EL supervisor is compatible with DCS-DL-7700 systems. The fabric ports connect to 7720R4-128PE spine switches, and the system uses FAN-7021H fan trays. Passive copper cables up to 4m and linear-drive pluggable optics are supported.

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

Features

- Fully scheduled, cell-based traffic spraying fabric that is internally lossless and fair
- Virtual Output Queues (VOQ) to eliminate head-of-line blocking
- Distributed credit scheduling and deep buffering to handle in-cast, bursts and speed mismatches
- Logical single-hop forwarding in a 2-tier leaf-spine topology, scaling to over 4600 x 800GbE hosts
- Accelerator-agnostic and Ultra Ethernet ready
- Passive copper up to 4m and linear-drive pluggable optics to reduce power and cooling
- CloudVision and Arista Validated Designs (AVD) for automated configuration
- Telemetry through LANZ, AI Analyzer and DANZ, with 1ms counter polling
- Field-serviceable supervisor, hot-swap PSUs and fans

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

- Host ports: 18 x 800GbE OSFP800
- Fabric ports: 20 x 800GbE OSFP800
- Additional ports: 1 x QSFP100
- Throughput (FDX): 14.4 (28.8) Tbps
- Packets per second: 5.4 Bpps
- End-to-end latency: from 3.8 us
- Packet buffer memory: 16 GB
- CPU: eight-core x86
- System memory: 64 GB
- Supervisor module: 7001-SUP-EL
- Supervisor SSD storage: 512 GB, secure boot enabled by default
- Management: 1 x 100/1000 port, 1 x USB, 1 x RS232 (RJ45)
- Power supplies: 2 x hot-swap, 1+1 redundant (PWR-2421-HV or PWR-2411-MC)
- Fans: 4 x hot-swap, N+1 redundant (FAN-7021H)
- Airflow direction: front to rear
- Typical / maximum power draw: 593 W / 1840 W, excluding optics
- Rack units: 2 RU
- Dimensions (WxHxD) including handles: 44 x 8.8 x 58.6 cm
- Weight: 21.4 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
- EOS feature licence: LIC-DL

FAQs

Q: Which licence does this switch use?
A: The EOS feature licence listed for the 7700R4C-38PE platform is LIC-DL.

Q: What power supplies does this SKU use?
A: It uses two hot-swap 2400W AC power supplies in 1+1 redundancy with two SAF-D power cords. Typical draw is 593 W and maximum is 1840 W, excluding optics.

Q: What does this leaf switch connect to?
A: The 20 x 800GbE OSFP800 fabric ports connect to 7720R4-128PE spine switches, forming a 2-tier leaf-spine Distributed Etherlink Switch fabric.

Q: What supervisor and airflow does this model have?
A: It has the 7001-SUP-EL supervisor with an eight-core x86 CPU, 64 GB of RAM and a 512 GB SSD, and front-to-rear airflow through the FAN-7021H fan trays.

Q: Can it be used with copper cabling?
A: Yes. Passive copper cables up to 4m and linear-drive pluggable optics are supported to help reduce power and cooling.