Cabletron Systems Cabletron CyberSWITCH CSX5500 User Manual

Also see for CyberSWITCH 5500: Quick start Manual

Contents

Central Site Remote Access Switch 143CONFIGURING B ASIC IP ROUTINGIP Network InterfacesIn example 1, we show three different types of network interfaces and the IP subnets that are used.It should be noted that even though the CyberSWITCH only has one physical connection to theWAN, it has more than one logical connection. Also, each one of these logical interfaces can be indifferent subnetworks.• The LAN interface is the simplest. It specifies the IP address (128.1.1.1) which connects the sys-tem to the Ethernet LAN. In our example, only one LAN interface is configured.• The Direct Host interface doesn’t have an IP address. Devices that use the Direct Host interfacemust have an IP address that is on the same subnet as one of the configured LAN interfaces.Since only one LAN interface is configured, that IP address must correspond to the one config-ured LAN IP address. (See Secondary IP Addressing for multiple LAN IP addresses).• The WAN interface in this example is used to connect two IP subnets (128.1.1.0 and 198.1.2.0).A separate subnet (192.2.2.0) is required to connect the subnets. If the remote router supportsunnumbered interfaces (such as Example 2), then the connecting subnet would not be required.ISDNHostFileServerHostRouter128.1.1.8 128.1.1.3Subnet 128.1.1.0(128.1.1.2 uses WAN Direct Host Interface)128.1.1.2Interfaces:LAN Interface 128.1.1.1WAN Direct Host InterfaceWAN Interface 192.2.2.1both WAN Interfaces useone PRI line198.1.2.3Subnet 198.1.2.0(Uses WAN Interface)192.2.2.1Subnet 192.2.2.0Needed forWAN Interface128.1.1.1192.2.2.3Example 1: LAN, WAN and WAN Direct Host InterfacesCSX5500