Arista 7800R3 Series

Arista 7800R3 Series Universal Spine and Cloud Networks

Designed for the next generation of large scale virtualized and cloud networks the Arista 7800R3 Series modular switches are the 3rd generation of the R-Series universal spine switches. They combine 400G and 100G density with internet scale table sizes and comprehensive L2 and L3 features. Advanced EOS features for network monitoring, precision timing, VXLAN network virtualization and EVPN are combined with extensive hardware resources with a wide choice of systems and line cards to support lasting investment protection.

Introducing the 7800R3 Series

Arista R3 Series Family Datasheet

The 7800R Series enable highly scalable and secure network designs with MPLS, Segment Routing, MLAG, ECMP, and EVPN-VXLAN technologies in addition to Arista’s TunnelSec strong encryption for layer 2 and layer 3.

The Arista 7800R Series FlexRoute™ engine and EOS NetDB provides the scalability to support Internet IP routing scale with the low power consumption and fast convergence while scaling to millions of routes.

Arista Algorithmic ACLs enable flexible high scale access controls with expanded pattern matching, combined with sFlow sampling of all interfaces at the full forwarding capacity while providing additional capabilities for filtering.

Arista 7800R3 Series Specifications

The Arista 7800R3 Series of modular switches deliver the industry’s highest performance with 460Tbps of system throughput to meet the needs of the largest scale data centers. With a choice of systems the 7800R Series provides four, eight, twelve or sixteen line card modules, two supervisor modules, and up to twelve fabric modules. Designed for continuous operations and with system wide monitoring of hardware and software components, simple serviceability and provisioning to prevent single points of failure the hardware architecture supports high-availability with hot-swap of all components.

Arista 7800R3 Series Architecture

The Arista 7800R3 Series leverages a deep buffer virtual output queue (VOQ) architecture that is 100% efficient, eliminates head-of-line (HOL) blocking and virtually eliminates packet drops even in the most congested network scenarios. An advanced traffic scheduler fairly allocates bandwidth between all virtual output queues while accurately following queue disciplines including weighted fair queuing, fixed priority, or hybrid schemes. As a result, the Arista 7800R3 Series can handle the most demanding data center requirements with ease, including mixed traffic loads of real-time, multicast, and storage traffic while still delivering low latency.

7800R3 System Comparisons

Available in a compact system design, as a choice of 16, 12, 8 and 4 slots, the Arista 7800R3 Series enables a range of wirespeed ports from 10G to 400G. It lowers total cost of ownership as it is designed to be efficient with power per port as low as 25W per 400G port which combined with front to rear cooling to optimize the data center environment produces the most reliable, dense and power efficient modular switch.

The 7800R3 Series offer a broad choice of line cards with a choice of speed and density options up to 48 ports of wire speed 100G and 40G, or 36 ports of 400G. Every 400G interface supports a choice of speeds including 25G and 50G providing unparalleled flexibility and the ability to seamlessly transition data centers to the next generation of Ethernet performance.

7800R3 400G Linecards:

	7800R3-36P	7800R3-36D 7800R3K-36DM	7800R3A-36P 7800R3A-36PM 7800R3AK-36PM	7800R3A-36D 7800R3A-36DM 7800R3AK-36DM
Ports	36 400G OSFP	36 400G QSFP-DD	36 400G OSFP	36 400G QSFP-DD
Max 400G	36	36	36	36
Max 100G	144	144	144	144
Max 50G	288	288	232	232
Max 25G	288	288	232	232
Port Buffer	24 GB	24 GB	16 GB	16 GB
Switching Capacity	14.4 Tbps	14.4 Tbps	14.4 Tbps	14.4 Tbps
Forwarding Rate	6 Bpps	6 Bpps	5.4 Bpps	5.4 Bpps
Algorithmic ACLs	Yes	Yes	Yes	Yes
Accelerated sFlow	Yes	Yes	Yes	Yes
Encryption Option	-	MACsec	TunnelSec	TunnelSec

7800R3 25/50/100G Linecards:

	7800R3-48CQ 7800R3K-48CQ	7800R3-48CQMS	7800R3K-72Y
Ports	48 100G QSFP	48 100G QSFP	72 25G SFP
Max 400G	-	-	-
Max 100G	48	48	-
Max 50G	96	96	32
Max 25G	96	96	72
Port Buffer	8GB	8GB	4GB
Switching Capacity	4.8Tbps	4.8Tbps	2.6Tbps
Forwarding Rate	2 Bpps	2 Bpps	1 Bpps
Algorithmic ACLs	Yes	Yes	Yes
Accelerated sFlow	Yes	Yes	Yes
Encryption Option	-	MACsec	-

Combined with the highly modular, robust Extensible Operating System (EOS), a dynamic smart deep buffer architecture with virtual output queuing for lossless forwarding, low latency and wire speed performance, the Arista 7800R3 line cards enable scalable and high performance data center solutions.

Scalability

Each 7800R3 Series line card delivers a consistent set of features supporting layer 2 and layer 3 data center designs with predictable and linear scaling. Arista's FlexRoute Engine enables full Internet routing coupled with support for a variety of IP/MPLS/VXLAN protocols.

¹ Undimensional scaling maxima with currently available MDB profiles. Available resources depend on user configuration.

10-400G Wire-speed Encryption

Deploying high performance, scalable bulk data encryption cost effectively is a major challenge for cloud data centers. Arista 7800R3 and 7800R3A Series line cards provide integrated wire speed strong encryption for mixed speeds from 10G to 400G offering comprehensive choices for secure connectivity at an efficient cost point.

7800R3 encryption solutions are fully compatible with all other 7800R3 Series line cards and utilize proven encryption technology to protect traffic for simple and scalable data center interconnect. In addition with a choice of pluggable 100G and 400G optics, encryption can be used to secure links between tiers in leaf and spine data center designs. 7800R3 line cards provide standards-based IEEE 802.1AE (MAC Security standard, referred to as MACsec) capabilities provide line-rate frame encryption and authentication. This ensures confidentiality as well as providing anti-replay protection and therefore confidence in the integrity of encrypted traffic.

7800R3A line cards add support for Arista TunnelSec, adding support for both IPsec and VXLANsec. IPsec and VXLANsec enable the construction of encrypted IP tunnels that traverse multiple unencrypted hops between router or VTEP endpoints, enabling line-rate strong encryption across third party infrastructure for WAN or DCI deployments. All TunnelSec solutions leverage AES-256-GCM for strong bulk encryption and operate at full line rate. The flexibility to off multiple types of encryption enables a broad range of deployments and removes the need for additional encryption devices while providing orders of magnitude improvements in latency and throughput when compared to traditional appliance based implementations.