Enterasys-networks XSR-3020 Manual de usuario descargar pdf (Pagina 22)

System Description

1-2 Overview

Figure 1-1 Typical XSR-3020 Topology

Hardware Features

The semi-modular XSR, shown in Figure 1-2, comes equipped with the following features:

• Standard 1U chassis (1-11/16 inches high by 17 inches wide by 21 inches deep) mountable in a

standard 19” rack.

• Broadcom 1250 dual-CPU, 64-bit processor (1700 Dhrystone MIPS @ 600 MHz) with load

balancing, 512 KByte on-chip Layer 2 cache, up to two co-issued, load-to-use instruction pairs

per cycle, and 32 KByte Instruction and Data caches.

• Internal, universal (100 - 240 VAC) power supply with country-specific line cords.

PSTN (for PPP)

Network

XSR-3020

Regional site backup:

modem pool

(3rd party RAS)

Primary link:

T1/E1 or serial interface

running PPP

Link backup

with PPP

via external

async modem

Authenticate incoming

PPP connection with

local authentication database

PSTN

IP subnet

XSR-3020 XSR-3020

IP subnet

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Enterasys-networks XSR-3020 Manual de usuario Pagina 22