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Creating IP over ATM Service

The ATM service allows service providers to receive traffic from subscribers who have customer premises equipment (CPE), such as routers, with ATM interfaces.

When you create IP over ATM service, you begin by selecting either ATM interface or services from the line interface. Create the following components in the following sequence:

  1. An ATM interface—You can create only a single ATM interface on a line interface.
  2. VP tunnel(s)—You can create no tunnels or multiple tunnels.
  3. ATM subinterfaces—You can create multiple ATM subinterfaces on a single ATM interface.
  4. ATM circuits—You can create multiple ATM circuits, one for each ATM subinterface.
  5. IP addresses—You can create multiple IP addresses for each IP interface.

You can begin the process of creating bulk services on an E-series device by creating services from an ATM module's line interface, as shown in Figure 9.

Figure 9, Figure 10, and Figure 11 illustrate the sequence of NMC-RX screens that you must navigate to create bulk services on an E-series device. Figure 9 presents the sequence up to selecting a service type.


Figure 9: Beginning the Process for Creating Bulk Services

Figure 10 continues the bulk services wizard from the point of selecting service types.


Figure 10: Continuing the Process for Creating Bulk Services

Figure 11 continues the bulk services wizard from the point of selecting the Bridged 1483 service type.


Figure 11: Configuring the Bridged 1483 Service Type

To create IP over ATM service:

  1. In the Instance Explorer, double-click a module that supports ATM, such as an OC3-ATM.
  2. Click a line interface, right-click, select Create, and click Services.

The Template Settings dialog box appears.
  1. Click Next to set either an ATM interface or the number of virtual path (VP) tunnels.

Creating an ATM Interface

An ATM port can have a major interface and one or more subinterfaces. If you create services on an existing ATM interface, the Number of VP Tunnels dialog box appears after the Template Settings dialog box. Otherwise, the Create ATM Interface dialog box appears.

To configure an ATM interface:

  1. Set the ATM interface's parameters. 
    2. 



     Table 45:  ATM Interface Parameters 
    

     Parameter
    		

     Description
    		

    

     Name
    
    		

     Identifies the interface; generated automatically
    
    		

    

     Alias
    
    		

     Description of the interface; 0-32 characters; default: blank
    
    		

    

     IfIndex
    
    		

     Identifies the interface on the particular line interface; generated automatically
    
    		

    

     Operational
    
    		

     Current operational status of the interface
    
    		

    

     Administrative
    
    		

     Desired status of the interface: Up/Down; default: Up
    
    		

    

     UNI Version
    
    		

     User Network Interface. You can select the version on a per port basis; the available versions are 3.0, 3.1, and 4.0.
    
    		

    

     OAM Cell Admin. State
    
    		

     Disabled or Enabled. When enabled, the E-series router ignores all operation, administration, and maintenance (OAM) cells received on the interface.
    
    		

    

     Map List Name
    
    		

     Associates a map list with the current ATM interface on OCx/STMx modules only. Range 32 characters. 
    

     See Creating NBMA Interfaces.
    
    		

    

     ILMI Settings
    		

    

     VPI
    
    		

     Virtual path identifier for ILMI; range 0-255. The recommended VPI value for the ILMI PVC is 0. It must match the value on the ATM switch.
    

     NOTE: The VPI and VCI values cannot both be set to 0.
    
    		

    

     VCI
    
    		

     Virtual circuit identifier for ILMI; range 0-65535. The VCI value is unique on a single link, not throughout the ATM network. The recommended VCI value for the ILMI PVC is 16. 
    

     NOTE: The VCI and VPI values cannot both be set to 0.
    
    		

    

     Admin Status
    
    		

     Up—Interface is enabled by the administrator.
    

     Down—Interface is disabled by the administrator.
    
    		

    

     Poll Frequency (sec)
    
    		

     You can enable polling on a per port basis. This is the interval in seconds between POLL PDU transmissions if there are no pending sequence data PDUs.
    
    		

    

     Virtual Circuit Descriptor
    
    		

     VCD. Identifies a virtual circuit descriptor number in the range 
1-4294967293.
    

     NOTE: The VCD value has no relationship to the VPI and VCI values. It has meaning only to the E-series router.
    
    		

    

     VCI/VPI Bits
    		

    

     VCs per VP
    
    		

     Total number of virtual circuits per virtual paths
    
    		

    

     Total VPs
    
    		

     Total number of virtual paths
    
    		

    

     Number of bits representing VCI
    
    		

     Changes the number of bits when you slide the toggle. Toggle automatically changes the VCs per VP and Total VPs fields.
    
    		

    

     CAC Settings
    		

     

    		

    

     Admin State
    
    		

     Admin status of connection admission control (CAC) on the ATM interface
    
    		

    

     Subscription Bandwidth (kbps)
    
    		

     Subscribed bandwidth of the ATM interface
    
    		

    

     UBR Weight (kbps)
    
    		

     Bandwidth associated with every unspecified bit rate (UBR) and UBR with peak cell rate (PCR) connections that are configured on the ATM interface
    
    		

    

     Port Available Bandwidth (kbps)
    
    		

     Available bandwidth of the ATM interface as calculated by the device; not editable
    
    		

    

    
 


    

    

    

     NOTE: The number of VCI bits you set determines the total number of VPs you can create.
  2. Click Next to enter number of VP tunnels information.

Creating VP Tunnels

VP tunneling is a feature that allows traffic shaping to be applied to the aggregation of all VCs within a single VP. VP tunnels can be used to ensure that the total traffic transmitted on a VP does not exceed a specifiable maximum peak cell rate (PCR).

To configure VP tunnels:

  1. In the Number to Create text box, enter the number of tunnels, and click Next.

To create no tunnels, enter 0 in the text box. If you enter 0, the next dialog box to appear will be Type of Sub Interface.

If you enter a nonzero number, the VP Tunnel dialog box appears.
  1. Set the VP tunnel parameters (Table 46). 
    2. 



     Table 46:  VP Tunnel Parameters  
    

     Parameter
    		

     Description
    		

    

     VPI
    
    		

     Virtual path identifier for VP tunnel; number in the range 0-255
    

     NOTE: VPI and VCI values cannot both be set to 0.
    
    		

    

     Tunnel Rate (kbps)
    
    		

     Number in the range 1-149760
    
    		

    

     Service Category
    
    		

     nrtVbr—Non-real-time variable bit rate
    

     cbr—Constant bit rate
  2. To the right of the VPI text box, click .

The VPI Formula dialog box appears. This dialog box allows you to set the Start and Increment values for VPIs.

If the ATM interface does not allow any bits for VPI, the settings must both be zero.

  1. Click OK to save changes and return to the VP Tunnel dialog box.
  2. In the VP Tunnel dialog box, click Next.

The Type of Sub Interface dialog box appears.
  1. Select the type of subinterface you want, and click Next.

Creating ATM Subinterfaces

An ATM subinterface is a mechanism that allows a single physical ATM interface to support multiple logical interfaces. You can create ATM subinterfaces from the major interface or from the VP tunnel with which you want to associate the ATM subinterface.

  1. In the Type of Sub Interface dialog box, select ATM Sub Interface, and click Next.

The Number of ATM Sub Interfaces dialog box appears.
  1. Enter the number of ATM subinterfaces you want to create, and click Next.

The ATM Sub Interface dialog box appears.
  1. Set the ATM subinterface parameters (Table 47). 
    2. 



     Table 47:  ATM Subinterface Parameters 
    

     Parameter
    		

     Description
    		

    

     Name
    
    		

     Identifies the interface; generated automatically
    
    		

    

     Alias
    
    		

     Description of the interface; 0-15 characters; default: blank
    
    		

    

     IfIndex
    
    		

     Identifies the interface on the particular line interface; generated automatically
    
    		

    

     Operational
    
    		

     Current operational status of the interface
    
    		

    

     Administrative
    
    		

     Desired status of the interface: Up/Down; default: Up
    
    		

    

     Dynamic Interfaces
    		

    

     Encapsulation
    
    		

     Specifies the type of dynamic encapsulation that will be accepted and detected by the ATM 1483 subinterface. 
    
    		

    

     Profile Name
    
    		

     Click 
to choose a profile from the Associate Profile dialog box.
    
    		

    

     Auto Configure
    
    		

     When the box is selected, you enable the autoconfiguration feature, which causes the ATM subinterface to support a dynamic interface.
    
    		

    

     Subscriber Information
    		

    

     Enable
    
    		

     Select to append subscriber information.
    
    		

    

     Details
    
    		

     When you select Enable, this field becomes active. Click 
to display the Subscriber Details dialog box. 
    

     Then configure a local subscriber on the E-series device to support authentication and configuration from RADIUS for a dynamic IP over ATM interface.
    
    		

    

    

    

    

    

     QoS
    		

    

     Profile Name
    
    		

     Click 
to choose a profile from the Associate QoS Profile dialog box.

In the Dynamic Interfaces group box, you can set a profile for each encapsulation.

  1. Click to the right of the Profile Name column.

The Associate Profile dialog box appears.
  1. Select the Profile you want, and click OK to save your selection and to return to the ATM Sub Interface dialog box.

If you want to view the profile you selected, click View.

  1. In the Dynamic Interfaces group box, you can enable Auto Configure by clicking the check box. If you enable Auto Configure, the ATM subinterface supports dynamic interfaces.
  2. If you want to display detailed information about a subscriber, double-click the Enable check box in the Dynamic Interfaces pane. This makes the Details button active.
  3. Click Details.

The Subscriber Details dialog box appears.
  1. Set the parameters, and click OK.

The ATM Sub Interface dialog box appears.

  1. Click Next.

The ATM Circuit dialog box appears. Go to Creating ATM Circuits.

NOTE: If you configured dynamic interfaces and selected Auto Configure, the last task you must perform manually is to configure the ATM circuit. The rest of the ATM configuration is completed dynamically.

Creating ATM Circuits

You can create a single ATM circuit on each ATM subinterface. Protocols such as ATM require that you create one or more virtual circuits (VCs) over which your data traffic is transmitted to higher layers in the protocol stack.

To create ATM circuits:

  1. In the ATM Sub Interface dialog box, click Next.

The ATM Circuit dialog box appears.
  1. Set the ATM Circuit parameters (Table 48). 
    2. 



     Table 48:  ATM Circuit Parameters 
    

     Parameter
    		

     Description
    		

    

     Admin Status
    
    		

     Select the status from the drop-down list:
    

      
  
    •  Up—Interface is enabled by the administrator
      • 
  
    •  Down—Interface is disabled by the administrator
      • 

    
    		

    

     AAL5 Encapsulation
    
    		

     Select the encapsulation for the ATM Adaptation Layer 5 (AAL5) from the drop-down list:
    

      
  
    •  rfc1483VcMux—aal5muxip 
      • 
  
    •  rfc1483Llc—aal5snap
      • 

    
    		

    

     Service Category
    
    		

     Service category for traffic management:
    

      
  
    •  ubr—Unspecified bit rate traffic management; select if no VCs require traffic shaping.
      • 
  
    •  ubrPcr—Unspecified bit rate peak cell rate; select for PCR only.
      • 
  
    •  nrtVbr—Non-real-time variable bit rate; can select for PCR, sustained cell rate (SCR), or maximum burst size (MBS).
      • 
  
    •  cbr—Constant bit rate; select for PCR only.
      • 

    
    		

    

     VPI
    
    		

     Virtual path identifier; range 0- 55; depends on values set on ATM interface
    

     NOTE: The VPI and VCI values cannot both be set to 0.
    
    		

    

     VCI
    
    		

     Virtual circuit identifier; range 0-65535; depends on values set on ATM interface
    

     NOTE: The VCI and VPI values cannot both be set to 0.
    
    		

    

     VCD
    
    		

     Virtual circuit descriptor; range 1-4294967295; depends on values set on ATM interface
    
    		

    

     PCR
    
    		

     Peak cell rate—Value must be greater than or equal to SCR
    

      
  
    •  OC3, OC3-ATM, OC12-ATM—Range 1-99999
      • 
  
    •  E3: range 64-30528
      • 
  
    •  T3: range 64-44209
      • 

    
    		

    

     SCR
    
    		

      Sustained cell rate
    

      
  
    •  OC3, OC3-ATM, OC12-ATM: range 1-99999
      • 
  
    •  E3: range 64-30528
      • 
  
    •  T3: range 64-44209
      • 

    
    		

    

     MBS
    
    		

     Maximum burst size
    

      
  
    •  OC3, OC3-ATM, OC12-ATM: range 1-99999
      • 
  
    •  E3: range 64-30528
      • 
  
    •  T3: range 64-44209
      • 

    
    		

    

     NBMA Parameters
    		

    

     Inverse ARP
    
    		

     Enables or disables InARP on the circuit
    
    		

    

     ARP Refresh Rate (min.)
    
    		

     Specifies refresh rate for ARP in minutes; range 1-60
    
    		

    

     OAM Settings
    		

    

     Status
    
    		

     Enable or disable generation of OAM F5 loopback cells on this circuit. This option enables VC integrity features that have an effect on the operational state of the ATM PVC.
    
    		

    

     Loopback Frequency
    
    		

     Time interval in seconds between transmissions of OAM F5 loopback cells; range 0-600. If this option is not specified, then OAM F5 loopback cells are generated once every 10 seconds.
  2. Click to the right of the VCI text box.

The VPI/VCI Formula dialog box appears.
  1. Make any changes, and click OK to save the changes and return to the ATM Circuit dialog box.
  2. Click to the right of the VCD box.

The VCD Formula dialog box appears.

  1. Make any changes, and click OK to save the changes and return to the ATM Circuit dialog box.
  2. In the ATM Circuit dialog box, click either Finish or Next.

Creating NBMA Interfaces

The NMC-RX application's bulk services feature allows you to create a nonbroadcast multiaccess (NBMA) service. For information about NBMA, see Creating an NBMA Interface in NMC-RX User Guide, Vol. 1, Chapter 17, Configuring ATM.

NOTE: The NBMA feature is supported only on OC3-4 and OC12 line modules.

To create an NBMA service:

  1. Navigate to the Type of Sub Interface dialog box. See Creating IP over ATM Service.
  2. Select NBMA Interface, and click Next.

The Number of NBMA Interfaces dialog box appears.
  1. Type the number of NBMA interfaces that you want to create in the Number to Create text box, and click Next.

The NBMA Interface dialog box appears.
  1. Set the NBMA interface parameters (Table 49).
    2. 



     Table 49:  NBMA Interface Parameters  
    

     Parameter
    		

     Description
    		

    

     Name
    
    		

     Identifies the interface; generated automatically
    
    		

    

     Alias
    
    		

     Description of the interface; 0-15 characters; default: blank
    
    		

    

     IfIndex
    
    		

     Identifies the interface on the particular line interface; generated automatically
    
    		

    

     Operational
    
    		

     Current operational status of the interface
    
    		

    

     Administrative
    
    		

     Desired status of the interface: Up/Down; default: Up
  2. Click Next.

The Number of ATM Circuits dialog box appears.
  1. Set the number of circuits, and click Next.

The ATM Circuit dialog box appears.
  1. Set the ATM circuit parameters. (See Table 48.)
  2. Click Next.

The Number of IP Addresses dialog box appears.
  1. Set the number of addresses that you want, and click Next.

The IP Address dialog box appears.
  1. Set the IP address parameters (Table 50).
    2. 



     Table 50:  IP Address Parameters  
    

     Parameter
    		

     Description
    		

    

     IP Major Interface
    		

    

     Name
    
    		

     Identifies the interface; generated automatically
    
    		

    

     Alias
    
    		

     Description of the interface; 0-15 characters; default: blank
    
    		

    

     IfIndex
    
    		

     Identifies the interface on the particular line interface; generated automatically
    
    		

    

     Operational
    
    		

     Current operational status of the interface
    
    		

    

     Administrative
    
    		

     Desired status of the interface: Up/Down; default: Up
    
    		

    

     Category
    
    		

     You can select only a point-to-point connection.
    
    		

    

     Virtual Router
    
    		

     Select the virtual router with which you are associating the IP address and IP interface. Each E-series router always has a default virtual router. In addition to the default router, you may have created other virtual routers. You can display a list of all the available virtual routers by clicking 
 next to the default router's name. The Associate Virtual Router list appears. From the list, select the virtual router with which you want to associate the IP interface you are creating.
    
    		

    

     Policy Information
    
    		

     You can associate an existing policy with each of the policy types by clicking 
.
    
    		

    

     Address Information
    		

    

     IP Address
    
    		

     A 32-bit number consisting of a network number and a host number; available only when Numbered address type is selected
    
    		

    

     Address Type
    
    		

      
  
    •  Numbered (default): You can create multiple secondary IP addresses for a single IP interface (except on bridged IP).
      • 
  
    •  UnNumbered: There can be only one UnNumbered address on an IP interface.
      • 

    
  
      
    
    •  If you select UnNumbered, the Select Interface Index button becomes active. Click this button to display the Select IP Interface dialog box, which allows you to select an Interface Index for the UnNumbered IP address.
      • 
    
    •  Unnumbered interfaces are often used in point-to-point connections. 
      • 
  
    
    		

    

     Net Mask
    
    		

      
  
    •  You can set a nondefault value only when you create the IP address. The default value is 255.255.255.0. You cannot modify this parameter later.
      • 
  
    •  For an unnumbered IP address, the value for the mask is 255.255.255.255. You cannot edit this value.
      • 
  
    •  Within a virtual router, the subnet part of the IP address must be unique in relation to the other addresses on the router.
      • 

    
    		

    

     MTU
    
    		

     Maximum transmission unit. Assigns the MTU size in the range 
0-65535. The default value is 0, which means the size is limited by the underlying layer.
    
    		

    

     UnNumbered Loop Interface Index
    
    		

      
  
    •  Takes the ifindex value of another IP loopback interface with Category set as a loopback. 
      • 
  
    •  Available only when UnNumbered is selected as address type.
      •
  2. Click Next.

The Summary dialog box appears. It lists all the components that you configured.
  1. To save, click Finish.
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