Bulk Configuration And Cac; Dynamic Interface Creation - Juniper JUNOSE SOFTWARE 11.0.X - LINK LAYER CONFIGURATION GUIDE 4-1-2010 Configuration Manual

Chapter 16: Configuring Dynamic Interfaces Using Bulk Configuration
To assign a VC class to a bulk-configured VC range, you use the atm class-vc
command from Profile Configuration mode to associate the VC class to a base profile.
Issuing this command applies the set of attributes in the specified VC class to all
bulk-configured VC ranges that are dynamically created from this base profile.
For details about configuring and using VC classes, including information about how
precedence levels affect how the router determines attributes values for dynamically
created circuits, see "Configuring ATM VC Classes" on page 55 in "Configuring ATM"
on page 3. For information about how to use the atm vc-class command to assign
a VC class to a base profile, see "atm class-vc" on page 593.
NOTE: Using the atm class-vc command inside a nested profile that is referenced
in a base profile has no effect on the bulk-configured VC ranges associated with the
base profile. The router accepts only those VC class assignments that are configured
in a base profile and ignores any VC class assignments made in a nested profile.

Bulk Configuration and CAC

You cannot create a bulk-configured VC range on an ATM interface on which you
have configured connection admission control (CAC). Conversely, you cannot
configure CAC on an ATM interface on which you have created a bulk-configured VC
range.
If you are upgrading to the current JUNOSe software release from a lower-numbered
release, configurations that use CAC and bulk configuration on the same ATM interface
continue to work. However, we recommend that you disable CAC on these ATM
interfaces to ensure continued compatibility with future JUNOSe releases.
For information about how to use the atm cac command to configure CAC, see
"Setting Optional Parameters" on page 24 in "Configuring ATM" on page 3.

Dynamic Interface Creation

After you configure the ATM 1483 base profile and create the range of VCs on the
ATM AAL5 interface, you associate these two components by assigning the base
profile to the VC range with the profile atm1483 bulk-config-name command.
As a final step, you must issue the auto-configure atm1483 command. This command
configures the ATM AAL5 interface to support autodetection of the ATM 1483 dynamic
encapsulation type.
When the router receives an incoming data packet on a circuit, it dynamically creates
the ATM 1483 subinterface, using the attributes specified in the base profile. After
examining the contents of the data packet, the router dynamically creates the required
interface columns above the ATM 1483 subinterface, using the configuration attributes
contained in the nested profiles, if specified, or in the base profile itself.
583
Configuring ATM 1483 Dynamic Subinterfaces