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Switches and Routers

SLX 9640

High Performance Fixed Router for WAN Edge, Internet Border Routing, Interconnect at Service Provider and Enterprise Data Centers

Product Highlights

  • High-density, fixed form factor router with 12 x 100/40 GbE ports and a maximum of 24 x 1/10 GbE ports
  • Compact 1U form factor for reduced power and footprint
  • Ultra-deep buffers of 6 GB to ensure optimal performance to handle traffic virtually any network for bursty traffic patterns
  • Provides industry leading Extreme routing for IPv4, IPv6, advanced MPLS/VPLS, Carrier Ethernet, and VXLAN overlay technology
  • Route scale: Up to 5M IPv4 and 2.5M IPv6
  • Integrated Application Hosting enables Extreme provided or 3rd-party applications without impacting switch performance
  • Pay as you grow flexibility to enable ports on demand and capacity with demand licensing
  • Hot-swappable modular power and fans
  • AC and DC power supply options

With cloud services, HD video streaming, Internet of Things (IoT), and increasing mobile data usage for billions of devices becoming standard, organizations must modernize the way they communicate and conduct business. Increasingly organizations are expanding from on premise, private and hybrid cloud to full multi-cloud architectures to address agility, scale, security, reliability and cost requirements as digital transformation reshapes their business environment.

The SLX 9640 is designed to cost-effectively deliver the scale and performance needed to address the explosive growth in network bandwidth, devices, and services.

The flexible architecture is designed for optimal operations, supporting diverse deployment options — such as Internet border, collapsed border routing, and data center interconnect — that require deep buffering for lossless forwarding. In addition, the SLX 9640 helps address the increasing agility and analytic needs of digital organizations with innovative network automation and visibility build on the Extreme Integrated Application Hosting Architecture.


The SLX 9640 is a very powerful compact deep buffer Internet border router, providing a cost-efficient solution that is purpose-built for the most demanding service provider and enterprise data centers and MAN/WAN applications. The robust system architecture supported by SLX-OS, and a versatile feature set including IPv4, IPv6, and MPLS/VPLS with Carrier Ethernet 2.0 and OAM capabilities, provide deployment flexibility.

The SLX 9640 delivers high performance and reliability required by the most advanced routers. It is designed for high availability from both a software and hardware perspective, such as a clear separation between the control plane and data plane and redundant power supplies and fan modules.

The SLX 9640 can be managed in a variety of ways. REST, NETCONF management interface or simple on-box management functions are delivered with CLI for manual configuration. For centralized management, ExtremeCloud IQ – Site Engine delivers a comprehensive unified management capability.

The SLX 9640 runs SLX-OS, a fully virtualized Linux-based operating system that delivers process-level resiliency and fault isolation. SLX-OS supports advanced switching features and is highly programmable with support for REST API with the YANG data model, Python, and NETCONF.

The SLX 9640 offers a unique procurement model with ports on demand and capacity demand licensing. The SLX can be purchased in a variety of available active port speeds and combinations, thus making it more cost-effective overpaying for all ports on the physical hardware. If additional port capacity is required in the future, simply apply a license to enable the ports on the fly.

Security is a top concern for every network design. The border routers are directly exposed to raw Internet traffic and therefore can be the first defense against malicious activity directed at your internal networks. Having multiple layers of security enhances protection. By starting at the border routers, you can utilize features such as BGP FlowSpec to mitigate directed denial of service attacks (DDoS) and advanced access control lists (ACLs) for CPU and data plane protection of the routers themselves.