1-34 CHAPTER 1: GETTING STARTED
IP Host on the Same IP Network
If your organization operates a TCP/IP network and needs to extend the IP network over geographically remote sites, it is possible to bridge the network using the OfficeConnect Remote. It is only possible to bridge where both sites have the same network address and the devices are on the same subnet. In a class C IP address, the network address is the first three groups of numbers. For example:
192.000.000.xxx
where xxx represents the host ID of the individual devices on the subnet. See “IP Addresses” in Appendix A for more information about addresses.
Typically IP bridging would be used to connect a back office or home office into a main site. Any further network connections would be carried out from the main site. An example of such a network is shown in Figure
During configuration, you enter the ISDN number and the IP addresses of any hosts to which you want to connect. In the example in Figure
Figure 1-17 IP Bridged Network
There are some issues about which you should be aware when implementing an IP bridging solution.
■Although calls to the remote site are only generated when data is addressed to a specific IP host or hosts (in our example, 191.000.000.100), any data that cannot be identified as local is also passed over the link while it is open. This can prevent the link from closing after the intended data has been transferred.
■Some devices and applications (for example autodiscovery programs on SNMP managers) poll all devices on a subnet at regular intervals and this could lead to frequent ISDN calls if you have entered