Cabletron Systems CSX1200, CSX1000 manual Isdn, System Components

THE CYBERSWITCH

System Components

The variety of network interfaces allows the installation of a wide range of devices at remote sites. As illustrated below, you can simultaneously choose bridges, routers, or host devices based on the specific remote site requirements.

192.1.1.2
Host	192.1.1.3
(or Router)
	Router
		100.1.1.2
	(or Host)

128.1.1.3

Host

	Remote
	Bridge
ISDN	100.1.1.3

128.1.1.2

Host

WAN

Interface 192.1.1.1

WAN Direct Host	RLAN Interface	Remote
	100.1.1.1	Bridge
Interface

LAN Interface 128.1.1.1

In the diagram above, the LAN Interface 128.1.1.1 is attached to the IP network 128.1.0.0. The WAN Direct Host Interface represents LAN Interface 128.1.1.1 and allows the remote IP hosts to share the network address space of 128.1.0.0. The WAN Interface 192.1.1.1 is logically attached to the IP network 192.1.1.0. The RLAN Interface 100.1.1.1 is logically attached to the IP network 100.1.1.0.

SYSTEM COMPONENTS

The major components of the CyberSWITCH are:

•System hardware consisting of a platform and an administration port provided by the platform.

•Four main categories of system software:

The boot device gains control at power-up. It runs diagnostics, downloads new versions of operational software, and prepares the host processor for execution of operational software. The flash file system stores a compressed image of operational software and I/O system software. It also stores other necessary files for configuration and information storage.

The operational software provides system functionality, such as download and initialization of the I/O subsystem. The I/O subsystem handles LAN I/O.

•Remote ISDN devices which interoperate with the system and allow device access to network resources.

More detailed descriptions of system software and hardware are included in the next two chapters. The following section describes remote ISDN devices.

Workgroup Remote Access Switch 33