Bulk Configuration And Cac; Dynamic Interface Creation; Overriding Base Profile Assignments - Juniper JUNOSE SOFTWARE 11.2.X - LINK LAYER CONFIGURATION GUIDE 7-7-2010 Configuration Manual

Chapter 18: Configuring Dynamic Interfaces Using Bulk Configuration
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 639.
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 23 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.

Overriding Base Profile Assignments

You can use the profile atm1483 bulk-config-name pvc command to assign an overriding
profile to a single ATM PVC that exists within a bulk-configured VC subrange. The VC
subrange that encompasses the PVC must have been previously configured with the
atm bulk-config command for use by a dynamic ATM 1483 subinterface. After you assign
the overriding profile, the router uses the information in this profile instead of the
information in the previously assigned base profile to create any subsequent ATM 1483
dynamic subinterface columns on the specified PVC.
Overriding the base profile assignment for an ATM PVC with a profile that includes
debugging attributes enables you to troubleshoot problems with ATM 1483 dynamic
subinterface columns created on the specified PVC. The overriding profile, like the original
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