HP MSR2000/3000/4000 Router Series Layer 2 - WAN Configuration Guide

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• Uninteresting packets—Packets not matching any permit statements or that match a deny statement.
When receiving such a packet, DDR either sends it out without resetting the idle-timeout timer if a
link is present, or drops it without originating calls for link setup if no link is present.
For DDR to forward packets correctly, configure a dial access rule and associate it with the dialup
interface (physical or dialer interface) by using the dialer-group command. You can either configure a
dial access rule or reference an existing ACL by using the dialer-group rule command.
To associate a dial access rule with the dialup interface:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Create a dialer access group
and configure a dial access
rule to specify the conditions
for triggering DDR calls.
dialer-group group-number rule
{ protocol-name { deny | permit } |
acl { acl-number | name
acl-name } }
By default, no dialer access group
exists.
3. Enter dialup interface
(physical or dialer interface)
view.
interface interface-type
interface-number
N/A
4. Associate the dialup interface
with the dial access rule by
associating the interface with
the corresponding dialer
access group.
dialer-group group-number
By default, a dialup interface is not
associated with any dialer access
group.
Make sure the group-number
arguments in the dialer-group rule
and dialer-group commands use
the same value.
Configuring C-DDR
In the C-DDR approach, you can configure DDR parameters for a physical interface by using one of the
following methods:
• Directly configure DDR parameters on the physical interface. This is applicable only to one-to-one
calls or one-to-many calls.
• Assign the interface to a dialer interface by assigning it to the dialer circular group associated with
the dialer interface. The interface can inherit the DDR parameters configured on the dialer interface.
This is applicable to many-to-one and many-to-many calls, in addition to one-to-many and
one-to-one calls.
A dialer circular group associates a dialer interface with a group of physical interfaces. All physical
interfaces in the group inherit the DDR parameters of the dialer interface. If the dialer interface is
associated with multiple destinations, any physical interface in the group can call any of these
destinations.
Depending on your network topology and dial needs (for example, to allow one or multiple interfaces to
both place and receive calls), you can use any combination of the following C-DDR configuration
approaches:
• Configuring an interface to place cal
ls to one or more remote ends
• Configuring an interface to receive calls from one or more remote ends
• Configuring multiple interfaces to place calls to one or more remote ends