Commitments, Contingencies and Leases (Narratives) (Details) (USD $)	12 Months Ended									0 Months Ended	3 Months Ended	24 Months Ended
	Jun. 30, 2012	Jul. 03, 2011	Jun. 27, 2010	May 08, 2008 Patent Infringement Litigation Versus Extreme Networks Patents	Apr. 09, 2008 Patent Infringement Litigation Versus Extreme Networks Patents	May 30, 2007 Patent Infringement Litigation Versus Extreme Networks Patents	Jun. 21, 2005 Patent Infringement Litigation Versus Extreme Networks Patents	May 30, 2008 Patent Infringement Litigation Versus Enterasys Patents	May 30, 2008 Patent Infringement Litigation Versus Enterasys Positive Outcome of Litigation	Jul. 06, 2001 Securities Fraud Class Action Complaints Versus Extreme Networks Employees	Jun. 30, 2012 Patent Infringement Litigation Versus Chrismar Systems, Inc. Patents	Dec. 31, 2000 Minimum Lawsuits	Jun. 30, 2012 Pending Litigation Patent Infringement Litigation Versus Chrismar Systems, Inc.	Jun. 30, 2012 Pending Litigation Minimum Patent Infringement Litigation Versus Chrismar Systems, Inc.	Jun. 30, 2012 Pending Litigation Maximum Patent Infringement Litigation Versus Chrismar Systems, Inc.
Loss Contingencies [Line Items]
Net rent expense	$ 4,300,000	$ 4,300,000	$ 4,200,000
Non-cancelable purchase commitments	38,800,000
Number of patents owned (in patents)						3	6
Patents owned in petition for reexamination (in patents)							5
Patents associated with dismissed litigation (in patents)				2	1		2
Patents associated with successful litigation (in patents)								3
Amount awarded by court									200,000
Number of current and former employees named in complaint (in employees)										6
Estimate for range of loss of litigation														300,000	1,400,000
Recorded estimate for probably loss for litigation													$ 300,000
Number of patents in settlement offer											3
Number of similar securities fraud lawsuits (in lawsuits)												300