Netopia 430 S/T, Справочное руководство

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C-14 Netopia ISDN Router Reference Guide
ISDN Router with connection profiles for Routers B and C (see the
following table).
The Netopia ISDN Router’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:
IP Routing Table
Network Address-Subnet Mask-----via
Router------Port--Age--------Type------
----------------------------------SCROLL
UP--------------------------------
0.0.0.0 0.0.0.0 a.b.c.1 WAN 3719
Management
127.0.0.1 255.255.255.255127.0.0.1 lp1 6423 Local
a.b.c.128 255.255.255.192a.b.c.128 WAN 5157 Local
a.b.c.248 255.255.255.248a.b.c.248 WAN 6205 Local
---------------------------------SCROLL
DOWN-------------------------------
UPDATE
Let’s see how a packet from the Internet gets routed to the host
with IP address a.b.c.249, which is ser ved by Router C. The packet
first arrives at Router A, which delivers it to its local network
(a.b.c.0). The packet is then received by the Netopia ISDN Router,
which examines its destination IP address.
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