0000891618-99-005478 S-3 4 19991201 CISCO SYSTEMS INC 0000858877 3576 770059951 CA 0731 S-3 33 333-91897 99767433 170 WEST TASMAN DRIVE SAN JOSE CA 95134-1706 4085264000 225 WEST TASMAN DRIVE SAN JOSE CA 95134-1706 S-3 1 000089161899005478-001-seq1-s-3.txt FORM S-3 EX-2.1 2 000089161899005478-002-seq2-ex-2-1.txt AGREEMENT AND PLAN OF MERGER AND REORGANIZATION EX-5.1 3 000089161899005478-003-seq3-ex-5-1.txt OPINION OF BROBECK HALE AND DORR EX-23.1 4 000089161899005478-004-seq4-ex-23-1.txt CONSENT OF PRICEWATERHOUSECOOPERS LLP