Netopia R910 - Manual (Page 183)

Understanding IP Addressing B-183
Routers B and C (which could also be Netopia R910s) ser ve the two remote networks that are subnets of
a.b.c.0. The subnetting is accomplished by configuring the Netopia R910 with connection profiles for Routers B
and C (see the following table).
The Netopia R910’s connection profiles for Routers B and C create entries in its IP routing table. One entr y
points to the subnet a.b.c.128, while a second entr y points to the subnet a.b.c.248. The IP routing table might
look similar to the following:
Connection profile Remote IP address Remote IP mask
Bits available for host
address
For Router B a.b.c.128 255.255.255.192 7
For Router C a.b.c.248 255.255.255.248 3
Internet
Router A
Router C Router B
a.b.c.0
a.b.c.16
a.b.c.1
a.b.c.2
a.b.c.248
a.b.c.249
a.b.c.128
a.b.c.129