• Silver-colored rack-mounted arista dcs-7800r3ak-36pm-lc network switches with ventilation slots and 36-port 400g osfp line card
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Arista

Arista DCS-7800R3AK-36PM-LC | 7800R3 36-Port 400G OSFP Line Card, FlexRoute 5M Routes

DCS-7800R3AK-36PM-LC

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Description

The Arista DCS-7800R3AK-36PM-LC is a high-performance modular line card designed for data center spine and internet peering deployments. This 36-port 400GbE OSFP line card features large route capacity with FlexRoute technology supporting over 5 million IP routes, enhanced MACsec encryption capabilities, and TunnelSec support for line-rate IPsec, MACsec, and VXLANsec encryption. Ideal for carrier edge, internet peering, and data center interconnect applications requiring massive routing scale and advanced security.

Features

Arista FlexRoute Engine with patented algorithmic approach for internet-scale routing
- Supports over 5 million IPv4/IPv6 routes for internet peering and carrier edge deployments
- TunnelSec technology with line-rate MACsec, IPsec, and VXLANsec encryption
- Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- Deep buffer design with deterministic fair delivery and zero packet loss
- Accelerated sFlow for line-rate flow sampling and network telemetry
- Algorithmic ACLs for flexible policy-based forwarding and access control
- Full Layer 2/3 feature set with VXLAN overlay support
- IP/MPLS/VXLAN routing protocols including BGP, OSPF, ISIS, and EVPN
- 512-way ECMP for massive traffic load balancing across paths
- Support for 400ZR coherent DWDM optics with 120km reach
- Optimized for high-power 400G OSFP and QSFP-DD transceivers
- Hot-swappable design with redundant fabric, supervisor, and power systems
- Arista EOS with zero-touch provisioning and automation capabilities
- Compatible with all 7800R3 and 7800R3A series line cards in same chassis
- Multicast routing with 128k multicast route entries
- Advanced traffic scheduling with weighted fair queuing and priority queuing

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

36 x 400GbE OSFP ports with breakout support to 100G, 50G, 25G, and 10G
- FlexRoute engine supports over 5 million IPv4/IPv6 routes in hardware
- Line-rate throughput: 28.8 Tbps full duplex per line card
- Enhanced MACsec (TunnelSec) with AES-256-GCM encryption for all port speeds
- Supports IEEE 802.1AE MACsec, IPsec (RFC 4303), and VXLANsec encryption
- Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- Accelerated sFlow for line-rate traffic sampling and telemetry
- Algorithmic ACLs with 24k TCAM entries per chip
- 512-way ECMP support for massive load balancing
- Optimized for 400ZR coherent DWDM optics up to 120km reach
- Hot-swappable design for high availability deployments
- Compatible with Arista 7804R, 7808R, 7812R, and 7816R chassis
- Arista EOS operating system with full Layer 2/3 feature set
- Encryption requires EOS license (sold separately)

FAQs

Q: What chassis platforms support this line card?
A: The DCS-7800R3AK-36PM-LC is compatible with all Arista 7800R Series modular chassis including the 7804R (4-slot), 7808R (8-slot), 7812R (12-slot), and 7816R/7816LR (16-slot) chassis. It can be mixed with other 7800R3 and 7800R3A series line cards in the same chassis.

Q: What routing scale does the 7800R3AK series support?
A: The 7800R3AK line cards feature Arista's FlexRoute technology with large route tables supporting over 5 million IPv4 and IPv6 routes in hardware. This makes them ideal for internet peering, carrier edge, and BGP full table deployments requiring massive routing scale beyond standard line cards.

Q: Does this line card support encryption and what protocols are included?
A: Yes, the DCS-7800R3AK-36PM-LC includes enhanced MACsec (TunnelSec) capabilities supporting IEEE 802.1AE MACsec, IPsec (RFC 4303), and VXLANsec at line-rate using AES-256-GCM encryption. Encryption works on all port speeds from 10G to 400G with no performance penalty. A separate EOS encryption license is required to enable these features.

Q: Can this line card support breakout configurations?
A: Yes, each 400GbE OSFP port can be broken out into lower-speed interfaces including 4x 100G, 8x 50G, or 16x 25G configurations, depending on transceiver and cable capabilities. This provides deployment flexibility for mixed-speed data center and service provider environments.

Q: What are the key differences between the R3AK and standard R3A line cards?
A: The R3AK series line cards include large-scale FlexRoute support for over 5 million routes compared to standard R3A models. Both support enhanced MACsec/TunnelSec encryption, but the R3AK models are optimized for internet peering and carrier edge deployments requiring full BGP internet routing tables with significant headroom for growth.

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