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Classical IP-Over-ATM (IPOA RFC 1577)
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There is no support for broadcast and multicast in a Classical IP environment. The Classical network is divided into LISs (Logical IP Subnets).
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Each LIS must have only one ATM ARP server configured on a switch or a host. ARP server is responsible for resolving an IP addresses into ATM addresses.
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MARS - Multicast address resolution server (central registry for IP multicast membership)
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ATM
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switch
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ATMARP Server
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IP to ATM mapping
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IP address
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ARM address
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IP address
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ARM address
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Client 1
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Client 2
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