Juniper's switching and security products are underperforming in the market, says an investor recommending the company review strategic options for those offerings.Elliott Management, which owns 6.2% of Juniper, says the company has lacked execution and lost momentum after entering the switching and security markets through either organic development or acquisition. Elliott this week recommended a three-prong strategy to Juniper management to unlock shareholder value, including a product portfolio review to reduce its exposure or even exit the switching and security markets.+MORE ON NETWORK WORLD: Riverbed may go private in a $3 billion deal+In a 13D filing and presentation submitted to Juniper management, Elliott asserts that Juniper's forays into enterprise switching and security have been "failures" and that the company has mismanaged its participation in those markets since entering them five and 10 years ago, respectively."A strategic review of the Security business and an evaluation of the spending and strategy around the Switching business are both appropriate and timely given the failures in these two areas," the Elliott presentation states.In switching, Elliott notes that Juniper "overpromised and underdelivered" on development and sales of the QFabric data center line, after spending over $100 million in two years on it. Elliott notes limited uptake of the full QFabric system and architecture -- node\/interconnect\/director -- the perception of it as proprietary and its immaturity.Elliott also notes that competitors like Cisco, Brocade, Arista and others have introduced competing fabric switches in the time the industry was awaiting QFabric."Juniper's overall switching share remains very low at ~3% in a competitive market dominated by Cisco and has failed to gain significant traction despite entrance into the market five years ago," the Elliott presentation states.According to Dell'Oro Group, Juniper's share of the $5.6 billion Ethernet switching market in the third quarter of 2013, was 2.4%, down from the 2.7% share it had in the $5.4 billion second quarter market but still good for third place behind Cisco and HP. Juniper's share in 2012 was 2.4%, up from 2.2% in 2011 and 1.9% in 2010.Juniper will be challenged to gain share as Extreme's acquisition of Enterasys now has it just about even with Juniper. Huawei and Dell are also in the 2% ballpark. HP's acquisition of 3Com in 2010 boosted its share to the 11% range.In security, Elliott notes that Juniper has lost significant share since acquiring NetScreen in 2004 for $4 billion. The company has also "mis-executed" on transitioning the security portfolio off of the legacy NetScreen operating system and platforms.Underscoring this was the abrupt resignation of Bob Muglia, executive vice president of Juniper's software solutions division, who was responsible for turning the security business around."Juniper's board should undertake a strategic review of the security business, which is underperforming and now lacks a leader after Bob Muglia's recent resignation," the Elliott presentation states.Juniper's lack of overall execution outside of its core routing business is measured by its merger and acquisition activity over the past 15 years, according to Elliott. Juniper spent over $7 billion on acquisitions during this period while missing out on $40 billion in opportunity in four specific markets -- security, WAN optimization, application delivery control and session border controllers -- due to failure to execute, Elliott states.NetScreen security is floundering, while Juniper discontinued products in WAN optimization, application delivery control and session border control, Elliott notes."Juniper has historically tried to buy into other attractive markets but consistently mis-executes post-acquisition, resulting in significant missed opportunities," the Elliott presentation states. "Pure-play vendors have succeeded in these 4 markets and have a combined value of over $40B today, illustrating that the opportunities for value creation were significant but Juniper simply failed to execute outside of routing."These endeavors have also distracted Juniper from its bread-and-butter routing business, Elliott notes. Citing data from Infonetics Research, Elliott says Juniper has given up share in core and edge routing business from 2005 to 2012: Core dropped 12 percentage points, to 24% in 2012 from 36% in 2005; and edge gave up six percentage points, to 14% from 20% over that time.Elliott recommends Juniper cease its acquisition activity until it can regain momentum in its existing business.Juniper did not respond to a request for additional commentary specific to the Elliott points on product rationalization. Earlier, Juniper stated that it would review the Elliott presentation despite returning $1.7 billion to shareholders over the past three years.Jim Duffy has been covering technology for over 27 years, 22 at Network World. He also writes The Cisco Connection blog and can be reached on Twitter @Jim_Duffy.Read more about lan and wan in Network World's LAN & WAN section.