Browse Prior Art Database

Terminal Control Processor/Instruction Processor Address Resolution Protocol as a Fiber Channel Standard Fabric Service

IP.com Disclosure Number: IPCOM000104625D
Original Publication Date: 1993-May-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 2 page(s) / 85K

Publishing Venue

IBM

Related People

Delp, G: AUTHOR [+2]

Abstract

Address resolution protocol (ARP) is the mechanism in Terminal Control Processor/Instruction Processor (TCP/IP) networks by which internet nodes determine the network physical address of other internet nodes. Generally, ARP depends on broadcast mechanisms intrinsic to the network architecture. A method is described which substitutes function addressing for broadcast addressing to accomplish TCP/IP ARP within an ANSI Fiber Channel Standard (FCS) network.

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Terminal Control Processor/Instruction Processor Address Resolution Protocol as a Fiber Channel Standard Fabric Service

      Address resolution protocol (ARP) is the mechanism in Terminal
Control Processor/Instruction Processor (TCP/IP) networks by which
internet nodes determine the network physical address of other
internet nodes.  Generally, ARP depends on broadcast mechanisms
intrinsic to the network architecture.  A method is described which
substitutes function addressing for broadcast addressing to
accomplish TCP/IP ARP within an ANSI Fiber Channel Standard (FCS)
network.

      ANSI Fiber Channel Standard (FCS) networks are composed of node
ports (N_ports) connected to a central hub, or "fabric", which forms
the communications interconnection between these N_ports.  The fabric
is a dynamic switching device that provides both circuit-switched and
packet-switched classes of service.  The N_ports interconnected
through a fabric form a network structure.  Most network physical
addresses are dynamically assigned by the fabric; however, certain
values within the FCS network physical address space are pre-assigned
as "well known" destination addresses of specific services located
somewhere within the network, commonly within the fabric itself.

      To provide the TCP/IP address resolution protocol (ARP) within
this environment, a well-known "ARP server" address is defined within
the FCS network physical address space.  Internet nodes on an FCS
network transmit ARP requests to this server address, which
substitutes for the ARP broadcast address used in other network
architectures.  Because this address is "well-known", its
characteristics effectively duplicate that of a broadcast address in
other physical networks.

      Each internet node on an FCS network performs a "registration
protocol" with the ARP server to identify both its internet address
and the FCS N_port physical addresses through which it may be
reached.  In this protocol, each N_port transmits a registration
message to the ARP server well-known address, containing the internet
address of one or more internet nodes behind that N_port.  The
registration protocol...