User guide

Help Contents > Configuring the ISDN gateway > Configuring IP Routing Settings
Configuring IP Routing Settings
If both Ethernet ports are enabled, you will need to set up one or more routing settings to control how IP traffic flows in
and out of the ISDN gateway. It is important that these settings are configured correctly, or you may be unable to make
calls to or from the ISDN gateway or access the web interface.
To configure the IP routing settings go to Home > Settings > Routes.
NOTE: Port B cannot be enabled on the Codian ISDN gateway
● Port Preferences
● IP Routes Configuration
● Current IP Status
Port Preferences
If both Ethernet ports are enabled, it is necessary to specify which port is used in certain special circumstances. Make
the appropriate selections described below, then press Apply changes to make any changes take effect.
Field Field Description Usage Tips
Default gateway
preference
The default gateway specifies the IP address
to which the ISDN gateway will send packets
in the absence of more specific routing (see
IP routes configuration). Therefore, it only
makes sense to have precisely one default
gateway, even though different default
gateways may have been configured for
Ports A and B. Use this option to decide
which port's default gateway configuration to
use as the unit's default gateway.
If Ethernet Port B is disabled, it will not be
possible to specify that port as the default
gateway preference.
Selecting Port B as default gateway
preference then disabling Port B will cause
the preference to revert to Port A.
Name server (DNS)
preference
The name server specifies the IP address to
which the ISDN gateway will send requests
to look up unrecognized host names in order
to determine their corresponding IP
addresses. Only one name server (and
associated secondary name server) may be
used, even though different name servers
may have been configured for Ports A and B.
Use this option to decide which port's name
server configuration to use as the unit's
name server.
If Ethernet Port B is disabled, it will not be
possible to specify that port as the name
server preference.
Selecting Port B as name server preference
then disabling Port B will cause the
preference to revert to Port A.
IP Routes Configuration
The controls in this section allow control over how IP packets should be directed out of the ISDN gateway. You should
only change this configuration if you have a good understanding of the topology of the network(s) to which the ISDN
gateway is connected.
Configuration of routes is divided into two sections: addition of new routes, and the display and removal of existing
routes.
Adding a New IP Route
To add a new route, first enter the details using the table below for reference. When you are satisfied with the details
entered, press 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
Codian ISDN GW 3200 Series User Guide Version 1.0(1.18)
Copyright (c) Codian Limited, 2006 Page 32 of 50