Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 28, 2017	Jan. 30, 2016
Segment Reporting Information
Net revenues	$ 581,463	$ 574,284
Cost of revenues	214,340	185,469
Gross margin	367,123	388,815
Storage Area Networking (“SAN”) Products
Segment Reporting Information
Net revenues	306,873	347,058
Cost of revenues	75,730	81,204
Gross margin	231,143	265,854
IP Networking Products
Segment Reporting Information
Net revenues	173,744	134,109
Cost of revenues	90,925	62,893
Gross margin	82,819	71,216
Global Services
Segment Reporting Information
Net revenues	100,846	93,117
Cost of revenues	47,685	41,372
Gross margin	$ 53,161	$ 51,745