
Using Eiconcard Routing Services
page 36
The circuit entries you define for Routing Services are bound to the Routing Services
call-directory entries, depending on availability. Only when the circuit entry is associated with
a call-directory entry can you attempt to establish a connection. Routing Services then
allocates an open subnetwork circuit to the call-directory entry as needed during the
connection. It is recommended that you match both the maximum number of call-directory
entries and the maximum number of subnetwork circuits to the number of connections that
you plan to have. For more information on configuring call-directory entries and subnetwork
circuits, refer to
Configuring Eiconcard Connections for Linux on page 15.
For more information about creating circuit entries, refer to Testing Your Installation on
page 40. For more information on the options used for creating circuits, consult
/opt/dialogic/c4l/docs/mprif.html.
Creating Backup Circuit Entries
You can create primary and backup circuits, so that if the primary circuit fails, the backup
circuit will ensure that the connection is not lost. The backup connection remains inactive until
the primary connection fails.
You must meet the following criteria to use primary and backup circuits:
• You must define a primary connection before defining a backup connection.
• Only one backup connection may be assigned per primary connection.
• The primary and backup connection must both use the same subnetwork protocol—X.25,
for example.
• A primary connection and its backup can use the same Eiconcard port, or two different
ports. If they use two different ports, both ports must be part of the same Eiconcard. Only
the logical connection is being backed up when the primary and backup circuits use the
same port.
• Backing up a PPP (point-to-point) connection or a permanent X.25 connection requires the
use of separate ports for the primary and the backup circuit. It is the physical link that is
backed up in these cases.
The connection backup feature works when it is used on both sides of the connection. You
cannot back up only half of a connection. If you back up system A’s connection (the circuit it
uses to connect to system B), system B’s connection to system A (the circuit configured on
system B) must also be backed up. To properly back up a connection between two systems,
you must configure a total of four circuits: a primary, and a backup on both systems.
For more information about backing up circuit entries, refer to Testing Your Installation on
page 40. For more information on the options used for creating circuits, consult
/opt/dialogic/c4l/docs/mprif.html.
Configuring Multiple Interfaces
Routing Services provides up to five WAN interfaces. These interfaces enable the establishment
of routes to multiple subnetworks simultaneously, offering a complete internetworking
solution. The five interfaces are configured in the mpr.if file. Each interface requires an
interface name, an IP address, and a network mask address. The interface names eic0 to eic4
identify the five Routing Services interfaces used by Dialogic.
A symbolic name can also be configured for each interface in the mpr.if file, which is stored
in the /etc/hosts file and can be used when specifying entries for the IP-routing table, though
this is optional. For more information on the IP-routing table, see
IP Routing Tables on page 38
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