Cisco LAN2LAN Software

Document ID: 15023

Contents

Introduction
Prerequisites
      Requirements
      Components Used
LAN2LAN Coexistence with the ARCNET LAN Adapter
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Introduction

This document discusses LAN2LAN co-existence with the ARCNET LAN adapter.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

LAN2LAN Coexistence with the ARCNET LAN Adapter

When you configure an ARCNET LAN adapter which is to coexist with LAN²LAN, a potential for conflict exists. Normally the ARCNET LAN adapter is LAN A and several of the options, including option 0, for ARCNET specify interrupt 2. Interrupt 2 is available on an PC/XT, but on a PC/AT, this translates to interrupt 9.

NetWare does not exclude interrupt 9 after interrupt 2 has been used. If you then choose a LAN²LAN option which uses interrupt 9, both adapters use the same interrupt. This results in the last-configured adapter owning the interrupt, so the first configured adapter does not function correctly. In most cases the visible symptom is that the ARCNET adapter does not work.

When you configure a router which includes both an ARCNET LAN adapter and a LAN²LAN, remember that interrupts 2 and 9 are the same and select options that do not conflict.

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