Cabletron Systems Cyber SWITCH 1000 User Manual

Workgroup Remote Access Switch 37IP R OUTING N ETWORKConfigure the CyberSWITCHC ONFIGURING THE IP I NTERFACE I NFORMATIONIn our example, we need to configure three types of interfaces (refer to the Network TopologyWorksheet). The LAN type network interface represents the system connection to the IP Network128.1.0.0 on the LAN. The WAN (Direct Host) interface is a logical extension of the LAN IPnetwork. Direct Host remote IP devices share the same IP address space as the IP network 128.1.0.0on the LAN. The WAN network interface is a logical interface to an IP network connected to theCyberSWITCH over the ISDN. The reason we are using both a WAN and a WAN (Direct Host)Interface is to allow the two devices, Rick Bear and Ralph Moose, to call into somewhere else if needbe.We will begin by adding the LAN interface. Press 2 at the IP configuration menu to begin the LANinterface configuration. Press 1 to add an IP interface. Press 1 to select LAN as the type of interfacethat you wish to configure.The interface name is a symbolic name given to the interface. For the LAN interface, you shoulduse a name that describes the LAN. It could be the name of the site or department. Type SanFranfor this example.You will then be asked for the IP Address for the interface. In our example, the value you shouldenter is 128.1.1.1. You will then be asked for the IP Subnet mask information. In our example, weare using a Class B address (without any subnetwork addressing) that requires 16 bits of theaddress to define the network number. Therefore, press to accept the default of “16”significant bits. Press to accept the default packet encapsulation type (Ethernet). Press to accept the default of 1500 as the MTU size.Press to accept the default transmit broadcast address. For almost all devices, this addresswill let the broadcast be transmitted to all devices on the local network. For some older devices, youmay need to try some of the other selections to get the transmission to work correctly.The rest of the LAN information requested pertains to the system RIP feature. (This informationwill not be asked for if you have disabled RIP.) RIP is a protocol used to exchange routinginformation among IP devices. Using RIP can automate the maintenance of routing tables on IPdevices and relieve you of having to keep the routing tables up to date manually. Static routes needto be configured manually if we need to access a WAN network that is not directly connected to thesystem, or if we need to access a LAN network through a router that does not support RIP.RIP determines the shortest path between two points in a network in terms of the number of “hops”between these points.For the rest of the required RIP LAN interface information, accept the default values.