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ネットワーク・ハードウェア Cisco Prisma EtherLinXのPDF 取付説明書をオンラインで閲覧またはダウンロードできます。Cisco Prisma EtherLinX 38 ページ。

Software Configurable Features

Introduction

The FiberAlert, Auto-Negotiation (Selective Advertising), and Bandwidth Control

features are all configurable via the management software or via serial configuration.

Refer to the Prisma EtherLinX unit Help file for software configuration information,

or refer to About Serial Port Configuration later in this document.

About FiberAlert

The Prisma EtherLinX unit includes the advanced troubleshooting feature,

FiberAlert, which minimizes the problems associated with the loss of one strand of

fiber. If a strand is unavailable, the Prisma EtherLinX unit notes the loss of link. The

device then stops transmitting data and the link signal until a signal or link pulse is

received. The result is that the link LED on BOTH sides of the fiber connection goes

out indicating a fault somewhere in the fiber loop. Using FiberAlert, a local site

administrator is notified of a fault and can quickly determine where a cable fault is

located.

Note: FiberAlert is not available/applicable on single-strand fiber products.

Auto-Negotiation, Duplex Mode and Speed

The twisted-pair ports on the Prisma EtherLinX unit auto-negotiate for speed and

duplex mode. This device can also selectively advertise or force the speed and

duplex mode. If the device has a fiber Uplink port, it does not auto-negotiate; it

always operates at 100 Mbps Full-Duplex.

Auto-Negotiation

The Prisma EtherLinX unit ships from the factory with Auto-Negotiation enabled on

the twisted-pair ports. In this mode, the twisted-pair port negotiates for speed and

duplex mode.

Forcing the Speed and Duplex Mode

The twisted-pair downlink ports on the Prisma EtherLinX unit can also be manually

set for 10 Mbps or 100 Mbps operation and for Half- Duplex or Full-Duplex (i.e., 10

Mbps Full-Duplex, 10 Mbps Half-Duplex, 100 Mbps Full-Duplex, or 100 Mbps Half-

Duplex).

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