Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2016	Jan. 31, 2015
Segment Reporting Information
Net revenues	$ 574,284	$ 576,239
Service	93,117	90,001
Cost of revenues	185,469	186,556
Gross margin	388,815	389,683
Storage Area Networking (“SAN”) Products
Segment Reporting Information
Net revenues	347,058	353,399
Cost of revenues	81,204	85,725
Gross margin	265,854	267,674
Internet Protocol (“IP”) Networking Products
Segment Reporting Information
Net revenues	134,109	132,839
Cost of revenues	62,893	64,201
Gross margin	71,216	68,638
Global Services
Segment Reporting Information
Net revenues	93,117	90,001
Cost of revenues	41,372	36,630
Gross margin	$ 51,745	$ 53,371