Installation Manual

TSUNAMI MULTIPOINT
2-8
The proxy capability allows SUs in the PMP network to share the same subnet
address, even though they are not directly connected. Without this capability, all the
SUs in the network will be forced to have different subnet addresses.
Figure 2-7: Proxy for remote devices residing in the same subnet
Network Configurations in the IP Routing Mode
In the PMP network, IP routing mode is superior to Bridging mode for several
reasons. First, as mentioned earlier, IP Routing mode conserves wireless bandwidth.
Second, it provides added control over which hosts attach to the network. Third, it
allows communications among end user devices associated with the same Base Station
Unit. Fourth, it gives the network operator greater freedom in partitioning his network
into logical subnets. However, if the operator expects his network to run smoothly in
IP Routing mode, some careful forward planning will be required, as illustrated in the
following examples.
Example 1
Hash Mode Static IP Address DHCP IP Address Subnet Mask Default Gateway
Router1 NA NA NA 255.255.255.0 BSU1 for 192.168.20.0 subnet
BSU2 for 192.168.21.0 subnet
BSU1 NA NA 255.255.255.0 Router1
BSU2 NA NA 255.255.255.0 Router1
SU1 Restricted PC1 NONE 255.255.255.0 NONE
SU2 Restricted PC2 NONE 255.255.255.0 NONE
SU3 Restricted NONE PC3 255.255.255.0 NONE
SU4 Restricted NONE NONE 255.255.255.0 NONE
PC1 NA 191.168.20.40 NONE 255.255.255.0 SU1 (via configuration)
PC2 NA 191.168.20.41 NONE 255.255.255.0 SU2 (via configuration)
PC3 NA NONE 191.168.21.40 255.255.255.0 SU3 (via DHCP)
PC4 NA NONE 191.168.21.41 255.255.255.0 SU4 (via DHCP)
Table 2-2: Example 1 configuration setting
BS1
192.168.20.1
CPE1
192.168.20.2
CPE2
192.168.20.3
PC1
192.168.20.4
PC2
192.168.20.5
ARP for PC2
Proxy for PC2