Avaya Configuring Routers and Protocols Manual de usuario descargar pdf (Pagina 21)

Documentation Roadmap (308665-15.2 Rev 00) 21

X.25 protocols

Nortel Networks supports X.25 protocols and services. Click on the following for a description:

Configuring X.25 Services

X.25 transports LAN traffic to packet-switching networks, usually over public data networks.

Because public data networks typically use error-prone analog lines, the X.25 protocol provides

extensive error checking, recovery, and packet sequencing. X.25 also allows many different kinds

of equipment to communicate across networks at a relatively low cost. This manual describes how

to configure X.25 services on a Nortel Networks router.

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Configuring X.25 Gateway Services

X.25 Gateway enables you to send and receive messages between X.25 and TCP/IP networks. It

maps TCP sockets to X.25 virtual circuits (and vice versa) or to Link Access Procedure Balanced

(LAPB) point-to-point connection identifiers. The LAPB information field contains the X.25 data

packet. When an X.25 packet reaches the destination router, the LAPB protocol strips away the

LAPB frame and delivers the packet to the network layer for further processing. This manual

describes how to configure X.25 gateway services on a Nortel Networks router.

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X.25 X.25 Gateway and

LAPB

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Avaya Configuring Routers and Protocols Manual de usuario Pagina 21