VSF vs VSX in Aruba

Rinki Singh — Wed, 05 Nov 2025 01:47:36 +0000

VSF (Virtual Switching Framework) and VSX (Virtual Switching Extension) are both Aruba technologies that let you connect two or more switches so they work together — but they’re designed for different purposes.

VSF is mainly used on access or edge switches (like Aruba 2930F or 3810M).
It combines multiple switches into one logical switch with a single control plane.
That means you manage them as one device — one IP address, one configuration.
If the master switch fails, another member takes over, but there can be a short interruption.
It’s simple, cost-effective, and great for smaller networks.
VSX is used on core or data center switches (like Aruba 8320, 8360, or 8400).
It links two switches together for high availability, but each one keeps its own control plane and configuration.
They synchronize important data between them and forward traffic actively on both sides.
This design allows non-disruptive upgrades and no downtime if one switch fails.
It’s more advanced, scalable, and ideal for critical environments that need continuous uptime.

Overview

Feature	VSF (Virtual Switching Framework)	VSX (Virtual Switching Extension)
Used on	Aruba 2930F, 3810M, 5400R series (Access/Aggregation)	Aruba 8320, 8360, 8400 series (Core/Aggregation)
Purpose	Simplify management by combining multiple switches into one logical switch	Provide high availability and scalability while keeping control planes independent
Design philosophy	Single control plane (one switch acts as master, others as members)	Dual control planes (each switch operates independently but synchronizes key data)

Architecture

Aspect	VSF	VSX
Control plane	Shared — one master controls all members	Independent — each switch keeps its own control plane
Management	Single IP and config for the stack	Each switch has its own management IP, but configuration is synchronized
Failover behavior	If master fails, new master elected; short disruption possible	No master/slave model — hitless failover and non-disruptive upgrades
Data plane	Unified	Distributed but synchronized
Software upgrades	Typically disruptive (whole stack reloads)	Non-disruptive (ISSU supported — In-Service Software Upgrade)

Connectivity

Feature	VSF	VSX
Inter-switch link	VSF link(s) — usually front-panel ports	ISL (Inter-Switch Link) — front-panel or dedicated ports
Peer keepalive	Not separate	Dedicated keepalive link used for heartbeat
Multi-chassis LAG (MC-LAG)	Supported internally as VSF LAG	Supported via VSX LAG (active-active forwarding)

	VSF	VSX
Control Plane	Single (Master/Member)	Dual (Independent)
Upgrade Method	Disruptive	Non-disruptive (ISSU)
Target Platforms	Access/Edge	Core/Data Center
Management Style	One logical switch	Two synchronized switches
Resiliency	Good	Excellent

VSF vs VSX in Aruba - Aruba R&S

VSF vs VSX in Aruba