Arista 7280R3A Modular Series

4RU modular switch-router at 14.4 Tbps with 512-way ECMP, MACsec, IPsec, and 400G ZR/ZR+ coherent optics for large-scale data center and service provider networks.

Ports: Up to 144x 100G or 36x 400G (9 I/O module slots; mix of DCS-7368-16S, DCS-7358-16C, DCS-7368-4D, DCS-7368-4P line cards) | Up to 144x 100G or 36x 400G (9 I/O module slots); MACsec + IPsec + VXLANsec encryption on all speeds 10G–400G | Up to 144x 100G or 36x 400G (9 I/O module slots); large-scale routing (up to 5M+ IPv4 routes), Algorithmic ACLs, enhanced MACsec Capacity: 14.4 Tbps Pps: 5.4 Bpps Form Factor: 4RU modular Latency: From 3.8 µs

Arista Products

Arista 7280R3A Modular Series

Arista 7280R3A Modular Series
Up to 144x 100G or 36x 400G (9 I/O module slots; mix of DCS-7368-16S, DCS-7358-16C, DCS-7368-4D, DCS-7368-4P line cards), 14.4 Tbps, From 3.8 µs latency

DCS-7289R3A-BND-D-F
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Arista 7280R3A Modular Series
Up to 144x 100G or 36x 400G (9 I/O module slots); MACsec + IPsec + VXLANsec encryption on all speeds 10G–400G, 14.4 Tbps, From 3.8 µs latency

DCS-7289R3AM-BND-D-F
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Arista 7280R3A Modular Series
Up to 144x 100G or 36x 400G (9 I/O module slots); large-scale routing (up to 5M+ IPv4 routes), Algorithmic ACLs, enhanced MACsec, 14.4 Tbps, From 3.8 µs latency

DCS-7289R3AK-BND-D-F
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The Arista 7280R3A Modular Series is the MACsec-capable modular variant within the 7280R3 switch-router family, scaling the encryption capability of the fixed 7280R3-K models into a multi-slot chassis architecture. Available in 4-slot (7280R3A-4) and 8-slot (7280R3A-8) configurations with the 7280R3A-LC-36CQ line card (36x QSFP28 100G with MACsec), the platform delivers up to 230.4 Tbps of encrypted switching capacity with the full 7280R3 routing feature set: MPLS, Segment Routing, EVPN-VXLAN, BGP-LU, and a routing table sized for 512K IPv4 host routes, 256K IPv4 LPM routes, and 256K IPv6 LPM routes.

The modular chassis architecture allows selective per-slot encryption deployment: line-card slots facing encrypted inter-site or inter-rack links can be populated with MACsec-capable 7280R3A line cards while other slots use non-MACsec variants, avoiding the cost of encrypting internal links that do not traverse untrusted physical plant. Dual hot-swappable supervisors maintain control-plane state through failover, and the same MKA (MACsec Key Agreement) automated key-management framework as the fixed 7280R3-K models handles per-port key negotiation and rotation without manual intervention.

Per-Slot MACsec Encryption

Populating only the line-card slots facing external or untrusted links with MACsec-capable 7280R3A cards avoids encrypting all internal switch-to-switch links within the same facility. This selective model reduces the overall cost of encryption deployment relative to fixed-platform designs where every port on the switch carries the MACsec hardware regardless of whether that port requires encryption.

4- and 8-Slot Chassis Scalability

Starting with a 4-slot chassis and expanding to 8 slots as port count requirements grow provides a capital-efficient path for organisations that are expanding encrypted inter-site connectivity incrementally. The 4-slot chassis uses the same supervisor module, line cards, and EOS version as the 8-slot, so the upgrade path requires only the new chassis and additional power modules, not new licensing, software qualification, or line-card replacement.

Full 7280R3 Routing Feature Set

The 7280R3A Modular retains the complete 7280R3 routing capability (MPLS, SR-TE, EVPN-VXLAN, BGP-LU, IS-IS, OSPF, 512K IPv4 host routes, 256K IPv4/IPv6 LPM routes) in the same encrypted chassis, without any feature reduction relative to the non-encrypted 7280R3. Organisations do not need to choose between full routing capability and MACsec; the platform provides both simultaneously from a shared hardware forwarding pipeline.

MKA Automated Key Management

IEEE 802.1X MACsec Key Agreement handles session establishment, key negotiation, and periodic key rotation automatically between MKA-capable peers. Compliance requirements that mandate short key lifetimes (for example, 24-hour or 1-hour key rotation periods) are met through EOS configuration without manual re-keying operations or key-distribution infrastructure beyond the standard BGP/IGP control plane already present in the network.

Technical Specifications

Full specifications for Arista 7280R3A Modular Series

Supervisor slots

1
Linecard Slots

9
Power Supply Slots

4 (N+N Redundant)
Fan Modules

5 (N+1 Redundant)
Size (H×W×D)

7" x 17.4" x 27.1" (17.9 x 44.2 x 68.83 cm)
Rack Space

4 RU
Weight (Chassis only)

30 lbs (13.6 kg)
Weight (Fully configured)

105 lbs (47.62 kg)
Typical Power Consumption

1244 W
Maximum Power Consumption

1927 W

CPU

Eight-Core x86
System Memory

64 Gigabytes
10/100/1000 Mgmt Ports

1
RS-232 Serial Ports

1 (RJ-45)
USB Ports

1
SSD Storage

240 GB
Typical/Max Power Draw

35 W / 55 W

Port Configuration

144 x 100G or 36 x 400G
System Capacity

Up to 14.4 Tbps
Packet Processing

Up to 5.4 billion packets per second
Interface Support

10G, 25G, 100G, 200G, 400G
Encryption Support

MACsec, IPsec, VXLANsec

L3 — Max IPv4 Routes

1,450K
L3-XL — Max IPv4 Routes

2,250K
L3-XXL — Max IPv4 Routes

2,850K
L3-XXXL — Max IPv4 Routes

3,950K
ECMP

512-Way

Operating Temperature

0 to 40˚C (32 to 104˚F)
Storage Temperature

-40 to 70˚C (-40 to 158˚F)
Relative Humidity

5 to 95%
Operating Altitude

0 to 10,000 ft (0–3,000m)

Documentation

Download product documentation and resources

Product Datasheet

Arista 7280R3A Modular Series Datasheet

All Available Models

Arista 7280R3A Modular Series

Arista 7280R3A Modular Series
Up to 144x 100G or 36x 400G (9 I/O module slots; mix of DCS-7368-16S, DCS-7358-16C, DCS-7368-4D, DCS-7368-4P line cards), 14.4 Tbps, From 3.8 µs latency

DCS-7289R3A-BND-D-F
Our Price: Request a Quote

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Arista 7280R3A Modular Series
Up to 144x 100G or 36x 400G (9 I/O module slots); MACsec + IPsec + VXLANsec encryption on all speeds 10G–400G, 14.4 Tbps, From 3.8 µs latency

DCS-7289R3AM-BND-D-F
Our Price: Request a Quote

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Arista 7280R3A Modular Series
Up to 144x 100G or 36x 400G (9 I/O module slots); large-scale routing (up to 5M+ IPv4 routes), Algorithmic ACLs, enhanced MACsec, 14.4 Tbps, From 3.8 µs latency

DCS-7289R3AK-BND-D-F
Our Price: Request a Quote

Get a Quote

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