User Guide

Setting Up 33
Filter Configuration
103-000178-001
August 29, 2001
Novell Confidential
Manual 99a38 July 17, 2001
IPX SAP Filter Example
In this example, two departmental networks are connected to a corporate
network through a WAN link between Router 1 and Router 2. The two routers
use the RIP/SAP routing protocol to communicate with each other. RIP
enables routers to send out periodic updates of service and routing
information. The internetwork topology is shown in Figure 2 below.
NOTE: Either Router 1 or Router 2 can be set up to do the following: RIP/SAP can
be run over the WAN link with an outbound SAP filter and with the NetWare Link
Services Protocol
TM
(NLSP
TM
) software on the LAN. RIP/SAP can be run on the
LAN with an inbound filter and with NLSP on the WAN. RIP/SAP can be run on the
LAN and WAN links, and both inbound and outbound filtering is enabled. On the
WAN, both ends need to be consistently configured.
Figure 2 IPX SAP Filter Example
To minimize the load on the WAN link, an IPX SAP filter is configured on
Router 1 and Router 2. This filter cuts down the periodic service information
updates across the WAN link by advertising only a few selected servers. The
clients across the WAN link can access the servers on the other network by
first attaching to these selected servers.
Department 1
Network
Corporate
Network
Department 2
Network
Server
SRV-DEPT2
Server
CORP-MAIL
Server
SRV-DEPT1
Advertise only
SRV-DEPT1 and SRV-DEPT2
NetWare
Router 1
WAN Link
WAN-1 WAN-1
Advertise only
CORP-MAIL
NetWare
Router 2