Extreme Networks, Inc. lineage

The enterprise networking business carrying the Cabletron lineage, with roughly $330M in annual revenue and about 900 staff. Enterasys brought a large installed base, a policy-driven management model, and its own switching operating systems.

Became: The management and policy heritage that runs through Extreme Management Center and, later, ExtremeCloud IQ Site Engine. Extreme stated at the time that ExtremeXOS would be extended with Enterasys features and support both hardware platforms - the first of several 'two operating systems, one catalogue' problems the company took on.

Announced 12 September 2013. This was Extreme's first acquisition, made when the company itself was struggling.

The WLAN line that had passed through Symbol Technologies and Motorola Solutions before Zebra, including the WiNG operating system and the AirDefense wireless security product.

• 2014 Motorola Solutions' enterprise business (by Zebra) $3.45B — Zebra had bought the business from Motorola Solutions two years earlier; the WLAN line was part of it.
• 2007 Symbol Technologies (by Motorola) ~$3.9B — Motorola had acquired Symbol, whose wireless work is where the WiNG operating system originates.

Became: ExtremeWireless WiNG. Extreme expected the business to generate over $115M in annualised revenue. This is why Extreme carried two wireless architectures for years - WiNG from Zebra, and later a cloud-managed line from Aerohive.

Acquisition completed 31 October 2016.

Avaya's campus networking division, acquired out of Avaya's bankruptcy process where Extreme acted as the stalking-horse bidder. It brought Shortest Path Bridging fabric technology descended from Nortel.

• 2009 Nortel's enterprise business $900M — Avaya bought it out of Nortel's bankruptcy. The Shortest Path Bridging work that became Extreme Fabric was Nortel's.
• 1998 Bay Networks (by Nortel) ~$9.1B — Nortel had acquired Bay Networks, which is how a telephone company came to own enterprise routing and switching at all.
• 1994 Wellfleet + SynOptics = Bay Networks — Bay Networks itself was the merger of Wellfleet Communications and SynOptics Communications - two of the companies that built the first enterprise networks.

Became: The VSP series and Fabric Connect, which became Extreme Fabric - the SPB-based fabric taught in the Extreme certification track. Extreme expected over $200M in annualised revenue from the business.

Announced 7 March 2017, closed 17 July 2017.

Brocade's Switching, Routing and Analytics division, bought from Broadcom as a condition of Broadcom's own acquisition of Brocade - Broadcom wanted the fibre-channel business and divested the rest.

• 2008 Foundry Networks (by Brocade) ~$3B — Brocade's ethernet switching and routing came from Foundry, so the SLX line descends from a company Brocade bought nine years before Extreme bought the division.

Became: The SLX data-centre switching line, and the analytics tooling. Brocade's own networking assets included Foundry Networks, so this deal carried a second lineage inside it.

Announced 29 March 2017, contingent on Broadcom closing its Brocade acquisition. Price not disclosed by either party.

A cloud-managed wireless and network-access-control company, and a pioneer of controllerless Wi-Fi. Extreme paid $4.45 per share, a roughly 40% premium.

Became: ExtremeCloud IQ - the cloud management platform the modern portfolio is organised around, and the reason the company's revenue mix shifted toward subscription. Extreme valued the deal at $210M after subtracting Aerohive's $62M net cash.

Announced 26 June 2019, completed 9 August 2019. Both the headline $272M and the net-of-cash $210M were published; they describe the same transaction.

A French SD-WAN and application-performance business, founded 1999, carved out of Infovista.

Became: ExtremeCloud SD-WAN, closing the one significant gap analysts had pointed at after the Aerohive deal - Extreme had edge-to-core and cloud management but no enterprise-class SD-WAN of its own.

Completed September 2021.