Cisco (Nasdaq:CSCO) confirmed rumors of making another acquisition in the WLAN space after making public this past Tuesday its acquisition of startup Airespace.  This is yet another company that Cisco has purchased in this space (other notables in the past included Aironet, bought in 1999, and Linksys, acquired in 2003).  Aironet solidified Cisco's entrance in the enterprise WLAN arena, while Linksys gave the San Jose-based company a solid position in the consumer/SOHO WLAN market.  However, the acquisition of Airespace definitely indicates that Cisco finally turned the page on the "fat" AP (Access Point) model (the architecture used by its Aironet solution), and the company seems to now be finally ready to embrace the centralized WLAN switch architecture which has become the industry standard.

The rationale for the new "thin" AP approach is the centralization of the network management function, responsible for tasks such as compensation for failing APs, surveillance of possible rogue access points, load balancing of the traffic between AP, and other functions such as authentication and encryption. Another consideration was that centralizing these functions at the switch translates into cost savings for enterprises deploying large, ubiquitous WLANs.

The key developments to watch following the deal are:

1- Disruption in the WLAN plans of Airespace OEM partners (including Alcatel, NEC and Nortel): we have seen the same disruption before in the UM space, when Cisco bought the Unity portion of Active Voice, and the havoc that caused to Unity OEM partners such as Alcatel and Siemens.

2- Impact to the Cisco product lineup: early indications are that Cisco will continue supporting its newer WLAN switch (SWAN strategy with the WLSM blade for the Catalyst switches) and the Airespace product lines.  But the latter solution is much broader and easier to use.

3- With Siemens' acquisition of Chantry Networks late last year and Cisco's purchase of Airespace, who is next?  The WLAN space still has a few innovative startup players that are left, some of which could be potential targets, including the like of Aruba Networks, Meru Networks, Strix Systems, and Trapeze Networks.  Could one of them be snapped up by any of the Cisco rivals that had partnered with Airespace in the past?  If so, what would be the multiples involved?  Stay tuned... there will be more acquisitions in this space happening this year.

4- Other ramifications: Om Malik points out something interesting in his blog, namely that Airespace's relationship with PoE (Power over Ethernet) mind share leader PowerDsine might finally help the Israeli company to establish stronger ties with Cisco.