Cisco Systems DOC-7812945=

A-4

Cisco WAN Manager User’s Guide

Version 10.5, Part Number 78-12945-01 Rev. D0, August 2003

Appendix A Internet Connec tivity

Functional Description

Also, router configuration allows the router to route packets from the IPATM interface SVC to a IP host

that wishes to manage or access the MGX 8850 Release 2 using TCP/IP clients. This configuration can

be separated into two distinct parts:

•The first part involves the configuration nee de d to in te rface with the IPATM interface(s) using an

SVC.

•The second part involv es the con f ig urat io n r equi red t o ma p d ata rece i v ed from a IP h os t/w ork sta t ion

to the correct SVC for the MG X 8 85 0 Re lease 2.

The router configuration required f o r IPATM interface SVC is as f ol lows :

•Creation of IP interface that supports ATM protocol. This interface is assigned an IP address. This

address may be on the same subnet as all MGX 8850 Releas e 2 IPATM interfaces reachable by this

router, or may be a unique host route. I n the latter case, extra configuration of th e router is required

to provide IP Host-routing functionality. This is described later in the Limitations and Design

section.

• Assignment of well- k nown ATM End Station Address (A E SA) for the router’s IP interface. This

AESA is to be used by IPATM interfaces to call rou ter.

•If Router’s IP interface supports ATMARP (RFC1577) the Router’s IP interface is configured to be

the ATMARP server for the MGX 8850 Release 2.

•If Router’s IP interfa ce does not support ATMARP (RFC1577) assignment of a map table that maps

each MGX 8850 Release 2 IP ad dres s to the MGX 8850 Release 2 AESA .

The router configuration required f o r IP h o st/ wo r kst ati on c om munication to MGX 8850 Relea se 2 :

•If Router’s IP interface supports ATMARP (RFC1577) handle receipt of ATMARP request from

MGX 8850 Release 2 IPATM interfaces. Dynamically add the m apping of the IPATM interface’s IP

address and SVC endpoint to the ATMARP table.

•If Router’s IP interface does not support AT MARP (RFC1 577) manua lly conf ig ure one IP h ost-ro ute

for each MGX 8850 Release 2 o n th e r o ut er’s inter face.

•Using a routing protocol (usually RIP), router broadcasts each IP reachable network or list of IP

reachable hosts to remote IP host/workstations that are running the same routing protocol. Included

in this broadcast will be the subnet or IP addresses of the MGX 8850 Release 2.

FigureA-4 describes the IP router function that provides IP connectivity to MGX 8850 Release 2.

FigureA-4 SVC Interface Between IPATM and Routers

39163

Telnet

Client/server API (e.g. Sockets)

TCP UDP

IPATM

interface

Router #1 To/from other

IP Networks

Router #n

FTP

MGX 8850 R2

SV+

SVC

TimeOfDay

To/from other

IP Networks