0000950149-99-001811 DEFA14A 1 19991019 CISCO SYSTEMS INC 0000858877 3576 770059951 CA 0731 DEFA14A 34 000-18225 99730312 170 WEST TASMAN DRIVE SAN JOSE CA 95134-1706 4085264000 225 WEST TASMAN DRIVE SAN JOSE CA 95134-1706 DEFA14A 1 000095014999001811-001-seq1-defa14a.txt DEFINITIVE ADDITIONAL MATERIALS