Configuring IP routes settings
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IP routes configuration
In this section you can control how IP packets should be direct ed out of the ISDN Gateway. You should
only change this configuration if you have a good under standing of the topology of the network(s) to
which the ISDN Gateway is connected.
Configuration of routes is divided into two sections: addit ion of new routes, and the display and removal of
existing routes.

Adding a new IP route

To add a new route, enter the details using the table belo w for reference. Click Add IP route to make the
addition. If the route already exists, or aliases (overlaps ) an existing route, you will be prompted to correct
the problem and try again.
Field
Field description Usage tips
IP address /
mask length
Use these fields to define the type of IP
addresses to which this route applies.
For IPv4 addressing, the IP address pattern
must be in the dot-separated IPv4 format, while
the mask length is chosen in the IP address /
mask length field. The mask field specifies
how many bits of the address are fixed; unfixed
bits must be set to zero in the address
specified.
For IPv6 addressing, the IP address pattern
must be in standard CIDR notation
(address/prefix length). IPv6 addresses must
be enclosed in square brackets [ ].
To route all IPv4 addresses in the
range 192.168.4.128 to
192.168.4.255 for example, specify
the IP address as 192.168.4.128
and the mask length as 25, to
indicate that all but the last seven
bits address are fixed.
Route
Use this field to control how packets destined
for addresses matching the specified pattern
are routed.
You may select Port A, Port B or
Gateway. If Gateway is selected,
specify the IP address of the
gateway to which you want packets
to be directed.
Selecting Port A results in matching
packets being routed to Port A's
default gateway (see Configuring
network settings).
Selecting Port B will cause matching
packets to be routed to Port B's
default gateway.
If Ethernet Port B is disabled, the
option to route packets to Port B will
be disabled.