Arista EOS
Operating systems
- Features
- Ease of use
- Ease of management
- Quality of support
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$495 per month
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What is Arista EOS
Arista EOS (Extensible Operating System) is a network operating system used to run Arista Ethernet switches in data center, campus, and routing deployments. It provides the control plane, management interfaces, and automation hooks used by network engineers and operators to configure, monitor, and troubleshoot switching and routing features. EOS is built on a Linux-based architecture and emphasizes a modular design with programmatic access via APIs and on-box agents. It is typically deployed as part of Arista’s hardware and network management ecosystem.
Linux-based, modular architecture
EOS uses a Linux-based foundation and separates many functions into processes rather than a single monolithic image. This design can reduce blast radius when individual agents fail and supports serviceability through process restarts. It also enables familiar Linux operational patterns for teams that already manage Linux systems. The architecture supports extensibility for on-box tools and integrations.
Strong automation and APIs
EOS exposes multiple programmatic interfaces commonly used in network automation, including eAPI (JSON-RPC over HTTP/S) and model-driven management options depending on platform and release. This supports integration with configuration management, CI/CD pipelines, and telemetry/observability tooling. Compared with general-purpose client and server operating systems, EOS is purpose-built around network configuration state and operational workflows. It also supports on-box scripting and event-driven automation capabilities used in network operations.
Consistent operations across platforms
EOS aims to provide a consistent CLI and operational model across Arista switching and routing product lines. This can simplify training and reduce operational variance across data center and campus environments. Standardized software behavior across hardware SKUs helps with repeatable change management and troubleshooting. It also supports centralized management approaches when paired with Arista’s management products.
Tied to Arista hardware
EOS primarily runs on Arista network devices and is not positioned as a general-purpose operating system for PCs, servers, or mobile endpoints. This limits portability compared with operating systems that run across broad hardware ecosystems. Organizations standardizing on multi-vendor network hardware may need separate operational models and tooling for other platforms. Licensing and lifecycle are also coupled to Arista’s product and support policies.
Network OS learning curve
EOS administration requires networking expertise (routing, switching, ACLs, QoS, EVPN/VXLAN, etc.) that differs from endpoint or server OS management. Teams coming from general-purpose operating systems may need time to adapt to network-centric configuration and troubleshooting workflows. Automation features still require disciplined change control and testing to avoid propagating misconfigurations. Operational maturity is important for safe large-scale use.
Feature availability varies by platform
Not all EOS features are available uniformly across every hardware model, interface type, or deployment role. Some capabilities depend on underlying ASICs, optics support, or specific software trains and release versions. This can complicate standardization when mixing device families across data center, campus, and routing use cases. Careful validation against platform-specific documentation is typically required during design and procurement.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Perpetual EOS feature licenses | Not published (contact Arista) | Base EOS feature set is bundled with Arista hardware; advanced feature licenses (E, FLX Lite, FLX, Z, V2) are offered as perpetual licenses applied per-system. Pricing not listed on public site; customers typically contact Arista or partners for SKUs/pricing. |
| Arista EOS as a Subscription (EaaS) | $495 per month (starts at, for select fixed configuration products) | Arista press release states EaaS pricing "starts at $495/month" and includes EOS advanced feature licenses and 24x7 A-Care support (announcement dated March 31, 2015). This is a published starting price for select fixed configuration products; detailed/current pricing is not listed on product/licensing pages. |
| CloudEOS Router (VM / Container) - BYOL monthly subscription | Not published (contact Arista) | CloudEOS Router is available as BYOL monthly subscriptions purchased from Arista for on-premise and as a Bring-Your-Own-License model; pricing SKUs are not published on the site. |
| CloudEOS Router - Pay-As-You-Go (PAYG) via cloud marketplaces | Usage-based hourly/annual rates (set in cloud marketplaces) | CloudEOS Router is available in public cloud marketplaces under PAYG (hourly or annual usage rates billed via the cloud provider). Arista notes PAYG billing is done via the cloud provider billing cycle; specific rates are set in those marketplaces (not listed on Arista’s product pages). |
| CloudVision (CloudVision Lite / CloudVision) | Not published (contact Arista) | CloudVision is licensed on a term-based software subscription model with two functional tiers (CloudVision Lite and full CloudVision). Public pricing is not displayed; contact Arista or partners for pricing and SKUs. |
Seller details
Arista Networks, Inc.
Santa Clara, California, USA
2004
Public
https://www.arista.com/
https://x.com/AristaNetworks
https://www.linkedin.com/company/arista-networks-inc/
