3Com 2500 manual References, RFC 791. Internet Protocol Specification, Networks, IP Routing

IP Routing References 4-11

Forwarding to Nodes within an LIS

Nodes can forward packets directly to other nodes in the same LIS. To forward a packet within the same LIS, the sending node requests a translation from the destination IP address to the corresponding ATM address from the ATM ARP server.

■If the address is known to the server, the server returns a message with this address

■If the address is not known to the server, the server returns a message to advise the sending node that the packet is discarded.

When the server returns a destination address, the sending node uses this learned address to create a virtual circuit (VC) and to forward this and all subsequent packets to the destination address. The sending node adds this VC to its ATM ARP cache.

IP Routing	Comer, Douglas E. Internetworking with TCP/IP. Volume I: Principles, Protocols,
References	and Architecture. Englewood Cliffs, New Jersey: Prentice Hall, Inc., 1991.
	Perlman, Radia. Interconnections: Bridges and Routers. Reading,
	Massachusetts: Addison-Wesley Publishing Company, Inc., 1992.
	Sterns, Richard. TCP/IP Illustrated. Volume 1: The Protocols. Reading,
	Massachusetts: Addison-Wesley Professional Computing Services, 1992.
	RFC 791. Internet Protocol Specification.
	RFC 792. Internet Control Message Protocol Specification.
	RFC 1009. Requirements for Internet Gateways.
	RFC 1042. A Standard for the Transmission of IP Datagrams over IEEE 802
	Networks.
	RFC 1058. Routing Information Protocol.
	RFC 1122. Requirements for Internet Hosts.
	RFC 1577. Classical IP over ATM.