Cabletron Systems SmartSwitch 8-slot, User'S Reference Manual

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Chapter 8: IPX Routing Configuration Guide
8 - 2 SSR User Reference Manual
• Routers perform broadcasting whenever they detect a change in the internetwork
configurations.
SSR's RIP implementation follows the guidelines given in Novell's IPX RIP and SAP
Router Specification Version 1.30 document.
SAP (Service Advertising Protocol)
SAP provides routers with a means of exchanging internetwork service information.
Though SAP, servers advertise their services and addresses. Routers gather this
information and share it with other routers. This allows routers to create and
dynamically maintain a database of internetwork service information. SAP allows a
router to exchange information with a neighboring SAP agent. As a router becomes
aware of any change in the internetwork server layout, this information is immediately
broadcast to any neighboring SAP agents. SAP broadcast packets containing all server
information known to the router are also sent periodically.
The SSR uses IPX SAP to create and maintain a database of internetwork service
information. The SSR’s implementation of SAP allows the following exchanges of
information:
• Workstations locate the name and address of the nearest server of certain type
• Router’s request for the names and addresses of either all or certain type of servers
• Response to workstation or router’s request
• Periodic broadcast to make sure all other routers are aware of the internetwork
configuration
• Perform broadcasting whenever they detect a change in the internetwork
configurations
Configuring IPX RIP and SAP
This section provides an overview of configuring various IPX parameters and setting
up IPX interfaces.
IPX RIP
On the SSR, RIP automatically runs on all IPX interfaces. The SSR will keep multiple
routes to the same network having the lowest ticks and hop count. Static routes can be
configured on the SSR using the CLI’s
ipx add route
command. Through the use
of RIP filters, the SSR can control the acceptance and advertisement of networks per-
interface.