Small Office Remote Access Switch 37
IP R
OUTING
N
ETWORK
Configure the CyberSWITCH
CONFIGURING THE IP INTERFACE INFORMATION
In our example, we need to configure three types of interfaces (refer to the Network Topology
Worksheet). The LAN type network interface represents the system connection to the IP Network
128.1.0.0 on the LAN. The WAN (Direct Host) interface i s a logical extension of the LAN IP
network. Direct Host remote IP devices shar e t he sam e IP a ddres s space as t he IP netw ork 128.1. 0.0
on the LAN. The WAN network interface is a logical int erface to an IP network connected to the
CyberSWITCH over the ISDN. The reason we are using both a WAN and a WAN (Direct Host)
Interface is to allow the two devi ces, Rick Bea r and R alph Moose, to c all in to somew here els e if nee d
be.
We will begin by adding the LAN interface. Press 2 at the IP configuration menu to begin the LAN
interface configuration. Press 1 to add an IP interface. Press 1 to select LAN as the type of interface
that you wish to co nfigure.
The interface name is a symbolic name given to the interface. For the LAN interface, you should
use a name that describes the LAN. It could be the name of the site or department. Type SanFran
for this example.
You will then be asked for the IP Address for the interface. In our example, the value you should
enter is 128.1.1.1. You will then be asked for the IP Subnet mask information. In our example, we
are using a Class B address (without any subnetwork addre ssing) that requires 16 bits of the
address to define the network number. Therefore, press <return> to accept the default of “16”
significant bits. Press <return> to accept the default packet encapsulation type (Ethernet). Press
<return> to accept the default of 1500 as the MTU size.
Press <return> to accept the default transmi t broa dcast addr ess. For almost al l devi ces, th is add ress
will let the broadcast be transmitted to all devices on the local network. Fo r some older devices, you
may need to try some of the other selections to get th e transmission to work correctly.
The rest of the LAN information requested pertains to the system RIP feature. (This information
will not be asked for if you have disabled RIP.) RIP is a prot ocol used to exchange routing
information among IP dev ices. Using RIP can autom a te th e maintenance of routi n g ta b le s o n IP
devices and relieve you of having to keep the routing tables up to date manually. Static routes need
to be configured manually if we need to access a WAN ne twork th at is not di rectly connecte d to the
system, or if we need to access a LAN network through a router that does not support RIP.
RIP determines the shortest p ath be tween two poin ts in a networ k in t erms of the number o f “hops ”
between these points.
For the rest of the required RIP LAN interface information, accept the default values.