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OCR: INFRASTRUCTURE OF MELTDOWN NETWORK Data center Hop coun: 1 Hop count 1 Operations backbone (4Mbps backbone (4Mbps) Renegade implementation Remote data center Channel IBM 3745 Remote Remote attached SNA bridge bridge, IO BM router mailrome Ne Ware BM 3174 Database Holpen Remote Corporate Remote Helper, bridge headquarters bridge address Enabled- Broadcast storms Token Ring B Danton oken Ring Robes. router {}6Mbps) 116Mbps) pierre B Touter Corporate services B B User rings B Shared file servers B B Defarge Facilities rings router Adapter congestion B B B Rumore dichin User Ethernet segments Digital Netware host B B B B Ethernet bockbonie Po san packet traffic B Routed R Work" R groups Protocols R R AppleTalk DECNe Pointto point SAP storms TCP/P 700-1000 plus IPX/SPX corporate. TAM ¿memnet SAPS worldwide every minute Corporate NetBIOS servers Named Pipes Source: Marc Holstein, network analyst DIC SNA FIGURE 1: In this example, traffic exceeds design capabilities; the integration of enterprise Token Ring and Ethernet created excessive broadcast traffic with intermittent broadcast storms. Several network meltdowns occured.