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.

7800R Architecture Advantages:

Investment protection - proven R Series with line card forward compatibility
Consistent 7800R3 Series architecture ensures seamless migration
Distributed packet processor scales forwarding capacity linearly
FlexRoute™ for Internet route table scale with low power draw
Flexible pipeline for programmable features including Algorithmic ACLs and Inband Network Telemetry
System wide health monitoring
High Bandwidth Intelligent and dynamic deep buffers for the most demanding traffic scenarios
Virtual Output Queues avoid head of line blocking
Cell based fabric with redundancy for 100% efficiency and consistent low latency and jitter
Optimized multicast forwarding
Comprehensive traffic counters with up to 16 classifications for real-time network monitoring and troubleshooting
QOS Fabric fairness - no hot-spots with mirroring enhancements

High Performance Universal Spine

Non-blocking 460Tbps of system capacity
High density 10/25/40/50/100/400G Ethernet
Wirespeed TunnelSec encryption at 10G-400G
- MACsec, IPSsec and VXLANsec
Scalable to 576 wire speed 400G ports
Ultra deep buffers up to 24GB per line card
Class leading latency of 3.5usec
14.4Tbps of fabric capacity per line card
Virtual Output Queues per port and CoS to eliminate head of line blocking

Arista EOS

Single binary image
Fine-grained truly modular network OS
Scalable control plane for internet peering
Extensible platform - bash, python, C++ , GO, OpenConfig
Resilient self-healing software
Rich Streaming Telemetry solutions
Over 10 Years of EOS innovations and experience with the R-Series Architecture

Cloud Grade Routing

Comprehensive routing: OSPF/ OSPFv3, MP-BGP, IS-IS, PIM, MSDP and MLD
Transport Signaling : LDP, RSVP-TE, SR/ SR-TE, BGP-LU, BGP-LS
Services: IPv4 VPNs (RFC 4364), 6PE/6VPE, L2/L3 EVPN , EVPN-VPWS, EVPN (MPLS), EVPN-MPLS Gateway, EVPN-DCI, EVPN-Multicast, VPLS, mLDP, Pseudowires, PTP, E-OAM
Tunneling: LDP, RSVP, SR, LDP over RSVP, GRE, MPLS over GRE
Resiliency: ECMP/ UCMP, PIC, RSVP-TE FRR, SRLG, TI-LFA
QoS: Classification, Flexible rewrite, Ingress Policing, VoQ, Hierarchical-QoS, Shaping
Support for 400G-ZR and the Arista ZR line system for metro DWDM
Security: MACsec, IPSec, uRPF, ACLs, CoPP, AAA, Dot1X

Scalable Cloud and Service Provider Designs

Comprehensive switching and routing feature set with rapid convergence
Segment Routing and EVPN Services for IX Providers and Cloud WAN
IPv4 and IPv6 Overlay and Underlay support
Internet scale IPv4 and IPv6 forwarding tables with over 5M IPv4 routes
Large scale IPv4 / IPv6, ACLs, and QoS with flexible profiles
Up to 96Bpps of wire speed forwarding
CloudVision^® provisioning and automation
VXLAN and 512-way multi-pathing for next generation DC
LANZ for microburst detection
Accelerated sFlow for high capacity network security and application monitoring
Inband Network Telemetry for flow and packet forensics at scale
CloudVision for Workflow Automation and Orchestration

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.

System Performance
	7816LR3	7816R3	7812R3	7808R3	7804R3
Description	Delivers the highest capacity, non-blocking Ethernet switching system.	Delivers the highest capacity, non-blocking Ethernet switching system.	Scalable non-blocking capacity for large scale deployments	Delivers high density, low power non-blocking Ethernet switching system.	Optimum form-factor for many medium to large deployments.
Switching Capacity	460 Tbps	460 Tbps	345 Tbps	230 Tbps	115 Tbps
Linecard Capacity	14.4 Tbps	14.4 Tbps	14.4 Tbps	14.4 Tbps	14.4 Tbps
40G QSFP	768	768	576	384	192
50G-2 Interfaces	1536	1536	1152	768	384
100G QSFP Interfaces	768	768	576	384	192
400G OSFP/QSFP-DD Interfaces	576	576	432	288	144
Forwarding Rate	96 Bpps	96 Bpps	72 Bpps	48 Bpps	24 Bpps
Total Buffer	384 GB	384 GB	288 GB	192 GB	96 GB
Rack Units	32	32	23	16	10
Airflow	Front to Rear	Front to Rear	Front to Rear	Front to Rear	Front to Rear

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.

Resources¹	7800R3 Series		7800R3K Series
Profile	L3-Profile (default)	Balanced Profile	L3-XL Profile (default)	L3-XXL Profile	L3-XXXL Profile	Balanced-XL Profile
ARP Entries	88K	80K	112K	112K	80K	96K
MAC Addresses	224K	224K	256K	192K	384K	256K
IPv4 Unicast Routes	1450K	800K	2250K	2850K	3950K	1850K
Additional IPv4 Unicast Routes with FlexRoute	+1792K	+1792K	+2048K	+1536K	+3072K	+2048K
IPv6 Unicast Host Routes	433-483K	250-267K	683-750K	833-950K	1100-1317K	567-617K
Multicast Routes	128K	128K	128K	128K	128K	128K
TCAM ACL Entries (Per chip)	24K	24K	24K	24K	24K	24K
Traffic Policy ACL IPv4 Prefixes	30K	30K	430K	296K	30K	430K
Traffic Policy ACL IPv6 Prefixes	10K	10K	150K	100K	10K	150K
ECMP	512-Way	512-Way	512-Way	512-Way	512-Way	512-Way

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.

Key Benefits:

High density strong encryption solutions for Cloud Data Centers integrated with 7800R3 for highest density and performance in a modular platform
Cost and performance optimized for Data Center Interconnect (DCI) and Leaf-Spine connections to securely transport massive volumes of traffic
Secure transport of data over distance with MACsec, IPsec or VXLANsec encryption eliminating additional intermediate devices

Key Features:

14.4 Tbps 36 port 400G line card
4.8 Tbps 48 port 100G line card
Delivers up to 6 Billion packets per second of wire speed L2 and L3 IP forwarding
Internet scale IPv4 and IPv6 forwarding tables
Compatible with all 100G and 400G line cards for 7800R3 Series
Multiple AES-256-CGM based encryption modes
- IEEE 802.1AE MACsec
- IPsec UDP-ESP (RFC 4303, RFC 3948)
- VXLANsec (VXLAN over IPsec)
Flexible support for 10/25/40/50/100/200 and 400G
Pluggable 100G QSFP and 400G OSFP and QSFP-DD optics for pay as you grow expansion
Up to 24GB of deep buffer packet memory and Virtual Output Queue architecture to eliminate head of line blocking and packet drops due to congestion