Configuring a Dynamic ATM 1483 Subinterface

When you use dynamic ATM 1483 subinterfaces over static ATM AAL5 interfaces, you use a process called bulk configuration to configure a range of ATM PVCs that support dynamic interfaces. On receipt of an incoming packet on the virtual circuit, the router dynamically creates the ATM 1483 subinterface. As part of the configuration process, you create an ATM 1483 base profile, which can optionally include nested profile assignments, to define the attributes required to configure the dynamic ATM 1483 subinterface and the dynamic upper-layer encapsulation types built over it.

To configure a dynamic ATM 1483 subinterface:

  1. (Optional) Configure profiles containing characteristics for the dynamic upper-interface encapsulation types to be created over the dynamic ATM 1483 subinterface.

    These profiles are referenced in the base profile for the dynamic ATM subinterface as nested profile assignments. For detailed instructions on creating profiles, see Dynamic Interface Configuration Using a Profile.

  2. Create the base profile for the dynamic ATM 1483 subinterface by assigning the profile a name. For more information, see Creating a Base Profile to Configure Attributes for a Dynamic ATM 1483 Subinterface.
    host1(config)#profile atm1483BaseProfile

    This command accesses Profile Configuration mode, which enables you to configure attributes in the base profile.

  3. Define attributes for the ATM 1483 subinterface in the base profile. For more information, see Configuring a Base Profile for Dynamic ATM 1483 Subinterface.
    1. Apply traffic-shaping parameters to the VC range on the ATM AAL5 interface.
      host1(config-profile)#atm pvc aal5autoconfig cbr 10000
    2. Configure the ATM 1483 subinterface for autodetection of the PPP upper-interface encapsulation type.
      host1(config-profile)#atm atm1483 auto-configure ppp
    3. Configure the ATM 1483 subinterface for autodetection of the IP upper-interface encapsulation type using a nondefault lockout time range of 3600–7200 seconds (1–2 hours).
      host1(config-profile)#atm atm1483 auto-configure ip lockout-time 3600 7200
    4. Configure a subscriber for the IP upper-interface encapsulation type.
      host1(config-profile)#atm atm1483 subscriber ip user-prefix joesmith
      domain myisp password-prefix abc123
    5. Configure a description for ATM 1483 subinterfaces that are created with this base profile.
      host1(config-profile)#atm atm1483 description VC_atm1
    6. Set an advisory speed for ATM subinterfaces that are created with this base profile.
      host1(config-profile)#atm atm1483 advisory-rx-speed 2000
    7. Assign a VC class to the bulk-configured VC ranges created on the dynamic ATM 1483 subinterfaces associated with this base profile. You must issue the exit command from Profile Configuration mode for the VC class association to take effect.
      host1(config-profile)#atm class-vc premium-subscriber-class
  4. (Optional) In the base profile, create nested profile assignments for the upper-interface encapsulation types, and include additional profile characteristics for other encapsulation types as needed. For more information, see Adding a Nested Profile Assignment to a Base Profile for a Dynamic ATM 1483 Subinterface.

    For example, the following commands configure nested profile assignments for the PPP and IP upper-interface encapsulation types, and define additional attributes for the PPPoE upper-interface encapsulation type.

    host1(config-profile)#atm atm1483 profile ppp myPppProfile host1(config-profile)#atm atm1483 profile ip myIpProfile host1(config-profile)#pppoe duplicate-protection host1(config-profile)#pppoe sessions 3000
  5. Exit Profile Configuration mode.
    host1(config-profile)#exit
  6. Configure the ATM and ATM AAL5 interface. For more information, see Creating a Basic Configuration in Configuring ATM.
    host1(config)#interface atm 5/0
  7. Configure a range of VCs on the static ATM AAL5 interface, and assign a name to this range. This operation can take several minutes to complete, depending on the number of VCs being configured. For more information, see Creating a Bulk-Configured VC Range on a Static ATM AAL5 Interface.

    Note: For information about the maximum number of ATM 1483 bulk configurations supported per chassis, see JunosE Release Notes, Appendix A, System Maximums.

    For example, the following command creates a VC range named myBulkConfig made up of two VC subranges that configure a total of 5,000 virtual circuits.

    host1(config-if)#atm bulk-config myBulkConfig vc-range 0 2 101 1100
    vc-range 3 6 201 700

    Note: For information about the maximum number of VCs (sum of the VPI/VCI addresses within all VC subranges) that you can configure with the atm bulk-config command per line module and per chassis, see JunosE Release Notes, Appendix A, System Maximums.

    Do not use any reserved VCI values when configuring VCs with the atm bulk-config command. For information about reserved VCIs, see Configuring F4 OAM in Configuring ATM.

  8. Assign the base profile configured for the ATM 1483 subinterface to the VC range configured on the ATM AAL5 interface. For more information, see Assigning the Base Profile Configured for a Dynamic ATM 1483 Subinterface to the VC Range Configured on a Static ATM AAL5 Interface.
    host1(config-if)#profile atm1483 bulk-config-name myBulkConfig atm1483BaseProfile
  9. Configure the ATM AAL5 interface to support autodetection of the ATM 1483 dynamic encapsulation type. For more information, see Configuring the Static ATM AAL5 Interface to Support Autodetection of an ATM 1483 Dynamic Encapsulation Type.
    host1(config-if)#auto-configure atm1483

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