Configuring An Isdn Dialer Interface As A Backup Interface; Example: Configuring An Isdn Interface As The Backup Interface - Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual

JUNOS 10.1 Network Interfaces Configuration Guide
Changing the caller incoming map when a call is connected can create inconsistencies
in the route and prevent traffic on a subnet from being transmitted. This is seen
when two dialer interfaces are configured and the association of the caller
incoming-map from one interface to the other is changed when a call is connected
on one of the interfaces.
The cause of the inconsistency is that dialer interfaces are pseudo interfaces that are
always up, even if not actually connected.

Configuring an ISDN Dialer Interface as a Backup Interface

Configuring the ISDN interface as a backup interface ensures continuous network
connectivity. The Services Router can be configured to fail over to the ISDN interface
if the primary connection experiences interruptions in Internet connectivity.
To configure an ISDN interface as the backup interface, include the
statement at the
interface-name

Example: Configuring an ISDN Interface as the Backup Interface

The following example illustrates a backup configuration using a primary serial
interface, two dialer interfaces, and a physical ISDN interface.
878
Configuring ISDN Logical Interface Properties
—Interval used to calculate the average load on the network. By
load-interval
default, the average interface load is calculated every 60 seconds. You can specify
an interval from 20 through 180 seconds, configurable in intervals of 10 seconds.
For more information about the load interval, see "Configuring Bandwidth on
Demand" on page 881.
load-threshold —Bandwidth threshold percentage used for adding interfaces.
Another link is added to the multilink bundle when the bandwidth reaches the
threshold value you set. Specify a percentage between 0 and 100. When the
value is set to 0, all available channels are dialed. The default value is 100.
—For logical and physical ISDN interfaces, specify the dial pool. The dial
pool
pool allows logical (dialer) and physical (
together dynamically on a per-call basis. On a dialer interface,
dialer interface which dial pool to use. On a
the pool to which the interface belongs.
—Specify the delay (in seconds) between two successive calls made
redial-delay
by the dialer (for dialout). The default is 3 seconds.
—IP prefix of one or more routes. The primary route is considered up
watch-list
if there is at least one valid route for any of the addresses in the watch list to an
interface other than the backup interface.
[edit interfaces interface-name unit logical-unit-number]
[edit interfaces interface-name unit logical-unit-number]
backup-options {
interface dln.0;
}
is the primary interface. The backup interface is specified as
br-pim/0/port ) interfaces to be bound
pool
br-pim/0/port interface,
backup-options
hierarchy level:
directs the
pool defines
.
dln