Aruba ClearPass vs Cisco ISE: Network Access Control Compared
Aruba ClearPass and Cisco ISE are the two dominant enterprise network access control (NAC) platforms, both delivering 802.1X authentication, role-based policy enforcement, guest access, BYOD onboarding, and posture assessment. The deciding factor is rarely raw feature parity; it comes down to how multivendor your network is and how tightly you want NAC fused to one switching ecosystem. This guide breaks down both platforms across architecture, AIOps, security, licensing, and federal procurement so the right buyer can pick with confidence.
The short answer
Aruba ClearPass wins for organizations running mixed-vendor networks (Cisco, Aruba, Juniper, Meraki, and more) that want one policy engine free of switch-vendor lock-in, plus strong profiling and device-fingerprinting out of the box. Cisco ISE wins for Cisco-standardized shops that will exploit deep TrustSec/SGT microsegmentation, Catalyst Center integration, and SD-Access. For most heterogeneous enterprise, healthcare, and SLED environments, ClearPass delivers comparable security with simpler multivendor enforcement; Cisco-native data centers leaning on group-based policy should weigh ISE.
Aruba ClearPass vs Cisco ISE, head to head
Specifications side by side
- Vendor / parent
- HPE Aruba Networking
- Cisco Systems
- Core function
- Network access control (NAC) / policy management
- Network access control (NAC) / identity services
- Authentication
- 802.1X, MAC auth (MAB), web auth, EAP types
- 802.1X, MAB, web auth, EAP types
- AAA protocols
- RADIUS and TACACS+ (TACACS+ for device admin)
- RADIUS and TACACS+ (device admin)
- Multivendor enforcement
- Yes - vendor-agnostic across Cisco, Aruba, Juniper, Meraki, others
- Possible, but advanced segmentation optimized for Cisco gear
- Segmentation model
- Dynamic role-based / downloadable user roles & VLANs/ACLs
- TrustSec Security Group Tags (SGT) / group-based policy
- Posture / endpoint health
- ClearPass OnGuard agents (persistent & dissolvable)
- Posture & remediation (Premier tier)
- BYOD onboarding
- ClearPass Onboard certificate provisioning module
- Native BYOD provisioning (Advantage tier)
- Device profiling
- Built-in profiling; Device Insight for AI fingerprinting
- Profiling & feed services (Advantage tier)
- Licensing model
- Platform + Access + Onboard + OnGuard (modular)
- Essentials / Advantage / Premier (nested subscription tiers)
- License metering
- Concurrent/active endpoint and module-based
- Active endpoints via RADIUS sessions
- Deployment options
- Hardware appliance or virtual appliance
- Hardware (SNS) appliance or virtual appliance
Where Aruba ClearPass wins
- Genuinely multivendor - enforce one policy across Cisco, Aruba, Juniper, Meraki, and third-party switches without rip-and-replace
- Strong out-of-the-box device profiling and fingerprinting, enhanced by Device Insight
- Modular licensing lets you buy only the Access, Onboard, or OnGuard capabilities you need
- TACACS+ device administration and guest/BYOD portals included in the platform
- Fits naturally into mixed HPE/Aruba/Juniper estates after the HPE networking consolidation
Where Cisco ISE wins
- Deepest microsegmentation on Cisco fabric via TrustSec Security Group Tags and group-based policy
- Tight integration with Catalyst Center, SD-Access, and Rapid Threat Containment
- Mature, nested licensing that bundles guest, BYOD, profiling, and posture as you move up tiers
- Huge partner ecosystem and Cisco TAC support footprint
- Native MDM/UEM integration and posture compliance at the Premier tier
Which one should you buy?
Hospital running a mix of Cisco, Aruba, and legacy switches with thousands of medical IoT devices
Pick Aruba ClearPass. Vendor-agnostic enforcement and strong profiling segment unmanaged medical IoT without standardizing every closet on one switch vendor.
Enterprise fully standardized on Cisco Catalyst with SD-Access already deployed
Pick Cisco ISE. TrustSec SGT segmentation and Catalyst Center integration deliver the richest policy automation when the fabric is all Cisco.
SLED or higher-ed campus consolidating onto HPE Aruba and Juniper networking
Pick Aruba ClearPass. ClearPass aligns with the post-acquisition HPE networking portfolio and avoids paying for Cisco-centric features it won't use.
Federal agency needing zero-trust NAC across heterogeneous infrastructure
Pick Aruba ClearPass. Multivendor 802.1X and dynamic role-based access enforce zero trust across mixed gear; we can source TAA-compliant ClearPass configurations.
Frequently asked
What is the main difference between Aruba ClearPass and Cisco ISE?
Both are enterprise NAC platforms doing 802.1X, guest, BYOD, and posture. The core difference is ecosystem: ClearPass is built to enforce policy across any vendor's switches, while Cisco ISE delivers its deepest segmentation (TrustSec/SGT) and automation when the network is all Cisco.
Is ClearPass or ISE better for a multivendor network?
ClearPass is generally the better fit for multivendor networks. It enforces consistent role-based access on Cisco, Aruba, Juniper, Meraki, and third-party infrastructure, whereas ISE's advanced microsegmentation assumes Cisco gear to reach its full value.
How does ClearPass licensing compare to Cisco ISE licensing?
ClearPass uses modular licensing - a Platform license plus Access, Onboard, and OnGuard licenses, so you buy only what you need. Cisco ISE uses nested subscription tiers (Essentials, Advantage, Premier) where each tier includes the lower ones and gates features like profiling, BYOD, and posture.
Do both ClearPass and ISE support 802.1X and TACACS+?
Yes. Both platforms provide RADIUS-based 802.1X authentication for network access and TACACS+ for device administration (login control of switches and routers), making either suitable as a unified AAA solution.
Which is better for zero-trust and microsegmentation?
For zero-trust on a Cisco fabric, ISE's TrustSec Security Group Tags give the most granular group-based policy. For zero-trust across mixed vendors, ClearPass's dynamic role-based segmentation and OnGuard posture checks deliver vendor-independent enforcement.
How do ClearPass and ISE handle BYOD and guest access?
ClearPass includes guest portals and the Onboard module for certificate-based BYOD provisioning. Cisco ISE provides guest and BYOD provisioning at the Advantage tier, with native MDM/UEM integration and posture compliance at the Premier tier.
Are Aruba ClearPass and Cisco ISE available for federal and SLED buyers?
Yes. Both are widely deployed in government. As an authorized HPE Aruba Networking reseller, we can source TAA-compliant ClearPass through federal vehicles such as GPC, SAP, and FAR, and we can also help evaluate ISE where a Cisco-standardized environment calls for it.
Should I migrate from Cisco ISE to ClearPass after the HPE networking consolidation?
It depends on your switching estate. If you're consolidating onto HPE Aruba and Juniper, ClearPass aligns with that portfolio and removes Cisco-centric licensing you may not use. If you remain heavily Cisco with SD-Access, ISE's native integration may still be the better economic and operational fit.
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