Cabletron Systems CyberSWITCH CSX150 User Manual

Also see for CyberSWITCH CSX150: User guide Quick start guide

Contents

Small Office Remote Access Switch 261CONFIGURING IPXIPX Routing ProtocolsRIP/SAP N UMBER OF T ABLE E NTRIESSpecifies the maximum number of routing entries which can be stored in the route or service table.You may select a number between 20 and 3072. The default value is 141IPX ROUTING PROTOCOL BACKGROUND I NFORMATIONRouting Information Protocol (RIP) and Service Advertising Protocol (SAP) are used to automatethe exchange of information across a network. These discovery protocols reduce the need tomanually update routing and service tables.IPX RIP is a protocol used to exchange routing information among IPX devices. RIP maintains arouting table of routing information gathered across the network. RIP broadcasts this information(either periodically or triggered by events) to update other routers. RIP determines the fastest pathbetween two points on a network in terms of the number of “ticks” between those points.IPX SAP is a protocol used to exchange service information among IPX devices. Servers use SAPpackets to advertise their particular services. Routers retrieve these packets and store them intables. Like RIP, routers then broadcast this service information to update other routers.R OUTING /SERVICE T ABLESThe system stores IPX routing information in a table. Each time a packet is received, the routingtable is referenced to determine to which network interface to forward the packet. There are threetypes of routes stored in this table:• static• RIP (learned)• internalStatic routes are configured locally on the system. These routes are stored, used internally andadvertised to other routers using RIP.RIP routes are learned from incoming RIP packets. These routes are stored, used internally andadvertised to other routers using RIP.Internal routes are stored and used by the system exclusively. These include routes for:• the internal network number of this router• the broadcast address for each IPX network interface configured• the individual address for each IPX network interface configuredThe maximum number of routes to be stored depends on the size and topology of the IPX network.Routers in the same network may have large differences in the maximum number of routes theystore just because of their location in the network. Because of these factors, and limited memory inthe router, the maximum number of routes for each router must be configurable.Similarly, the system also stores IPX service information in a table. Each time service informationis requested, the service table is referenced to determine the IPX address of the server. Thefollowing service entries are stored in this table:• static• SAP