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Cisco WAN Manager User’s Guide
Version 10.5, Part Number 78-12945-01 Rev. D0, August 2003
Appendix A Internet Connectivity
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 needed to interface with the IPATM interface(s) using an
SVC.
• The second part involves the configuration required to map data received from a IP host/workstation
to the correct SVC for the MGX 8850 Release 2.
The router configuration required for IPATM interface SVC is as follows:
• 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 Release 2 IPATM interfaces reachable by this
router, or may be a unique host route. In the latter case, extra configuration of the router is required
to provide IP Host-routing functionality. This is described later in the Limitations and Design
section.
• Assignment of well-known ATM End Station Address (AESA) for the router’s IP interface. This
AESA is to be used by IPATM interfaces to call router.
• 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 interface does not support ATMARP (RFC1577) assignment of a map table that maps
each MGX 8850 Release 2 IP address to the MGX 8850 Release 2 AESA.
The router configuration required for IP host/workstation communication to MGX 8850 Release 2:
• If Router’s IP interface supports ATMARP (RFC1577) handle receipt of ATMARP request from
MGX 8850 Release 2 IPATM interfaces. Dynamically add the mapping of the IPATM interface’s IP
address and SVC endpoint to the ATMARP table.
• If Router’s IP interface does not support ATMARP (RFC1577) manually configure one IP host-route
for each MGX 8850 Release 2 on the router’s interface.
• 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.
Figure A-4 describes the IP router function that provides IP connectivity to MGX 8850 Release 2.
Figure A-4 SVC Interface Between IPATM and Routers
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Telnet
Client/server API (e.g. Sockets)
TCP UDP
IP
IPATM
interface
Router #1
To/from other
IP Networks
Router #n
S
I
G
A
P
I
FTP
MGX 8850 R2
SV+
SVC
SVC
TimeOfDay
To/from other
IP Networks
