Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 30, 2016	Aug. 01, 2015	Jul. 30, 2016	Aug. 01, 2015
Segment Reporting Information
Net revenues	$ 590,721	$ 551,819	$ 1,688,311	$ 1,674,633
Service	99,726	88,619	287,956	266,952
Cost of revenues	233,822	179,915	592,286	540,837
Gross margin	356,899	371,904	1,096,025	1,133,796
Storage Area Networking (“SAN”) Products
Segment Reporting Information
Net revenues	282,114	309,451	925,799	976,362
Cost of revenues	70,630	73,657	223,806	233,150
Gross margin	211,484	235,794	701,993	743,212
IP Networking Products
Segment Reporting Information
Net revenues	208,881	153,749	474,556	431,319
Cost of revenues	117,862	70,586	240,991	198,631
Gross margin	91,019	83,163	233,565	232,688
Global Services
Segment Reporting Information
Net revenues	99,726	88,619	287,956	266,952
Cost of revenues	45,330	35,672	127,489	109,056
Gross margin	$ 54,396	$ 52,947	$ 160,467	$ 157,896