0000891618-99-005613 S-3 4 19991209 CISCO SYSTEMS INC 0000858877 3576 770059951 CA 0731 S-3 33 333-92441 99771704 170 WEST TASMAN DRIVE SAN JOSE CA 95134-1706 4085264000 225 WEST TASMAN DRIVE SAN JOSE CA 95134-1706 S-3 1 000089161899005613-001-seq1-s-3.txt FORM S-3 EX-2.1 2 000089161899005613-002-seq2-ex-2-1.txt MERGER AGREEMENT EX-5.1 3 000089161899005613-003-seq3-ex-5-1.txt OPINION OF BROBECK, PHLEGER & HARRISON LLP EX-23.1 4 000089161899005613-004-seq4-ex-23-1.txt CONSENT OF PRICEWATERHOUSECOOPERSLLP