Ddr Types; Command And Hardware Compatibility - HPE FlexNetwork MSR series Configuration Manual

Figure 54 Relationships among physical interfaces, dialer interfaces, and call destinations in
bundle DDR
Dialer bundle 1
Dialer bundle 2
Dialer bundle 3

DDR types

Depending on how DDR calls are triggered, DDR includes packet-triggered DDR, auto-dial DDR,
and route-triggered DDR.
Packet-triggered DDR
You can define packets on a dialup interface as interesting and uninteresting by configuring access
control rules. Only interesting packets trigger outgoing calls and reset the link idle-timeout timer.
Before a dialup connection is established, uninteresting packets will be dropped. After a dialup
connection is established, uninteresting packets can be forwarded. When the link idle-timeout timer
expires, DDR disconnects the connection.
For more information about interesting and uninteresting packets, see
dialup interface."
Auto-dial DDR
DDR automatically initiates a dialup connection to the remote end upon router startup without
requiring a triggering packet. If the connection cannot be established, it will retry at the auto-dial
interval. The established connection will not disconnect due to the idle-timeout timer expiration.
Route-triggered DDR
You can configure networks to be monitored and then associate a dialup interface with the networks.
When no routes to the monitored networks exist, DDR creates a secondary link from the dialup
interface to forward traffic. After the secondary link is activated, the system regularly checks the
status of the primary link. When the primary link recovers, the secondary link is disconnected
immediately or after the secondary link disconnection delay, depending on your configuration.

Command and hardware compatibility

Commands and descriptions for centralized devices apply to the following routers:
•
MSR1002-4/1003-8S.
•
MSR2003.
Physical interface
Ser2/1/0
Bri2/4/0
Ser2/1/1
Bri2/4/1
Ser2/1/2
Asy2/5/0
Dialer interface
Dialer 1
Dialer 2
Dialer 3
167
Call destination A
Call destination B
Call destination C
"Associating a dial rule with a