Configuring Pseudowire

Configuring Pseudowire

This chapter provides information about configuring pseudowire (PW) features on the Cisco ASR 903 Series Router.

Pseudowire Overview

The following sections provide an overview of pseudowire support on the Cisco ASR 903 Series Router.

Asynchronous Transfer Mode over MPLS

An ATM over MPLS (AToM) PW is used to carry Asynchronous Transfer Mode (ATM) cells over an MPLS network. It is an evolutionary technology that allows you to migrate packet networks from legacy networks, while providing transport for legacy applications. AToM is particularly useful for transporting 3G voice traffic over MPLS networks.

You can configure AToM in the following modes:

  • N-to-1 Cell—Maps one or more ATM virtual channel connections (VCCs) or virtual permanent connection (VPCs) to a single pseudowire.
  • 1-to-1 Cell—Maps a single ATM VCC or VPC to a single pseudowire.

The Cisco ASR 903 Series Router also supports cell packing and PVC mapping for AToM pseudowires.


Note
This release does not support AToM N-to-1 Cell Mode or 1-to-1 Cell Mode.

For more information about how to configure AToM, see the "Configuring an ATM over MPLS Pseudowire" section in the "Configuring Pseudowire" chapter of the Cisco ASR 903 Router Chassis Software Configuration Guide.

Configuring ATM IMA

Inverse multiplexing provides the capability to transmit and receive a single high-speed data stream over multiple slower-speed physical links. In Inverse Multiplexing over ATM (IMA), the originating stream of ATM cells is divided so that complete ATM cells are transmitted in round-robin order across the set of ATM links. Follow these steps to configure IMA on the Cisco ASR 903 Series Router.


Note

IMA is used as an element in configuring ATM over MPLS pseudowires. For more information about configuring pseudowires, see Chapter 11, “Pseudowire Configuration.”


Note

The maximum ATM over MPLS pseudowires supported per T1/E1 interface module is 500.

To configure the ATM interface on the router, you must install the ATM feature license using the license install atm command. To activate or enable the configuration on the IMA interface, use the license feature atm command. For more information about installing licenses, see the Software Activation Configuration Guide, Cisco IOS XE Release 3S.


Note

You can create a maximum of 16 IMA groups on each T1/E1 interface module.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    card type {t1 | e1}slot [bay]

    4.    controller {t1 | e1}slot/subslot/port

    5.    clock source internal

    6.    ima group group-number [scrambling-payload]

    7.    exit

    8.    interface ATM slot/subslot/ IMA group-number

    9.    no ip address

    10.    atm bandwidth dynamic

    11.    no atm ilmi-keepalive

    12.    exit


DETAILED STEPS
     Command or ActionPurpose
    Step 1enable


    Example: 
     Router> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.

     
    Step 2configure terminal


    Example: 
    Router# configure terminal
     

    Enters global configuration mode.

     
    Step 3card type {t1 | e1}slot [bay]


    Example: 
    Router(config)# card type e1 0 0
     

    Specifies the slot and port number of the E1 or T1 interface.

     
    Step 4controller {t1 | e1}slot/subslot/port


    Example: 
    Router(config)# controller E1 0/0/4
     

    Specifies the controller interface on which you want to enable IMA.

     
    Step 5clock source internal


    Example: 
    Router(config-controller)# clock source internal
     

    Sets the clock source to internal.

     
    Step 6ima group group-number [scrambling-payload]


    Example: 
    Router(config-controller)# ima-group 0
     

    Assigns the interface to an IMA group, and set the scrambling-payload parameter to randomize the ATM cell payload frames. This command assigns the interface to IMA group 0.

    Note   

    This command automatically creates an ATM0/IMAx interface.

    Note   

    To add another member link, repeat Step 3 to Step 6.

     
    Step 7exit


    Example: 
    Router(config-controller)# exit
     

    Exits the controller interface.

     
    Step 8interface ATM slot/subslot/ IMA group-number


    Example: 
    Router(config-if)# interface atm0/1/ima0
     

    Specify the slot location and port of IMA interface group.

    • slot—The location of the ATM IMA interface module.

    • group-number—The IMA group.

    Note   

    To explicitly configure the IMA group ID for the IMA interface, use the optional ima group-id command. You cannot configure the same IMA group ID on two different IMA interfaces; therefore, if you configure an IMA group ID with the system-selected default ID already configured on an IMA interface, the system toggles the IMA interface to make the user-configured IMA group ID the effective IMA group ID. The system toggles the original IMA interface to select a different IMA group ID.

     
    Step 9no ip address


    Example: 
    Router(config-if)# no ip address
     

    Disables the IP address configuration for the physical layer interface.

     
    Step 10atm bandwidth dynamic


    Example: 
    Router(config-if)# atm bandwidth dynamic
     

    Specifies the ATM bandwidth as dynamic.

     
    Step 11no atm ilmi-keepalive


    Example: 
    Router(config-if)# no atm ilmi-keepalive
     

    Disables the Interim Local Management Interface (ILMI) keepalive parameters.

     
    Step 12exit


    Example: 
    Router(config)# exit
     

    Exits configuration mode.

     

    Configuring an ATM over MPLS Pseudowire

    ATM over MPLS pseudowires allow you to encapsulate and transport ATM traffic across an MPLS network. This service allows you to deliver ATM services over an existing MPLS network.

    The sections below describe how to configure transportation of service using ATM over MPLS:

    Configuring the Controller

    SUMMARY STEPS

      1.    Router> enable

      2.    Router# configure terminal

      3.    Router(config)# card type e1 0 0

      4.    Router(config)# controller E1 0/4

      5.    Router(config-controller)# clock source internal

      6.    Router(config-controller)# ima-group 0 scrambling-payload

      7.    Router(config)# exit


    DETAILED STEPS
       Command or ActionPurpose
      Step 1Router> enable  

      Enables privileged EXEC mode.

       
      Step 2Router# configure terminal  

      Enters global configuration mode.

       
      Step 3Router(config)# card type e1 0 0  

      Configures IMA on an E1 or T1 interface.

       
      Step 4Router(config)# controller E1 0/4  

      Specifies the controller interface on which you want to enable IMA.

       
      Step 5Router(config-controller)# clock source internal  

      Sets the clock source to internal.

       
      Step 6Router(config-controller)# ima-group 0 scrambling-payload  

      If you want to configure an ATM IMA backhaul, use the ima-group command to assign the interface to an IMA group. For a T1 connection, use the no-scrambling-payload to disable ATM-IMA cell payload scrambling; for an E1 connection, use the scrambling-payload parameter to enable ATM-IMA cell payload scrambling.

       
      Step 7Router(config)# exit  

      Exits configuration mode.

      Note   

      For more information about configuring IMA groups, see the “Configuring ATM IMA” section on page 11-9.

       

      Configuring an IMA Interface

      If you want to use ATM IMA backhaul, follow these steps to configure the IMA interface.


      Note

      You can create a maximum of 16 IMA groups on each T1/E1 interface module.

      SUMMARY STEPS

        1.    Router> enable

        2.    Router# configure terminal

        3.    Router(config-controller)# interface atm0/1/ima0

        4.    Router(config-if)# no ip address

        5.    Router(config-if)# atm bandwidth dynamic

        6.    Router(config-if)# no atm ilmi-keepalive

        7.    Router(config)# exit


      DETAILED STEPS
         Command or ActionPurpose
        Step 1Router> enable  

        Enables privileged EXEC mode.

        • Enter your password if prompted.

         
        Step 2Router# configure terminal  

        Enters global configuration mode.

         
        Step 3Router(config-controller)# interface atm0/1/ima0  

        Specifies the slot location and port of IMA interface group. The syntax is as follows:

        • slot—The slot location of the interface module.

        • group-number—The group number of the IMA group.

        The example specifies the slot number as 0 and the group number as 0.

        Note   

        o explicitly configure the IMA group ID for the IMA interface, you may use the optional ima group-id command. You cannot configure the same IMA group ID on two different IMA interfaces; therefore, if you configure an IMA group ID with the system-selected default ID already configured on an IMA interface, the system toggles the IMA interface to make the user-configured IMA group ID the effective IMA group ID. At the same, the system toggles the original IMA interface to select a different IMA group ID.

         
        Step 4Router(config-if)# no ip address  

        Disables the IP address configuration for the physical layer interface.

         
        Step 5Router(config-if)# atm bandwidth dynamic  

        Specifies the ATM bandwidth as dynamic.

         
        Step 6Router(config-if)# no atm ilmi-keepalive  

        Disables the ILMI keepalive parameters.

         
        Step 7Router(config)# exit  

        Exits configuration mode.

        For more information about configuring IMA groups, see the “Configuring ATM IMA” section on page 11-9.

         

        Configuring the ATM over MPLS Pseudowire Interface

        You can configure ATM over MPLS is several modes according to the needs of your network. Use the appropriate section according to the needs of your network. The sections below show configuration of ATM over MPLS pseudowire types:


        Note

        Release 15.1(1)MR does not support N-to-1 VCC Cell Transport for mapping multiple PVCs, 1-to-1 VCC Cell Mode, or PVC mapping.


        Note

        When creating IP routes for a pseudowire configuration, build a route from the xconnect address (LDP router-id or loopback address) to the next hop IP address, such as ip route 30.30.30.2 255.255.255.255 1.2.3.4.

        Configuring 1-to-1 VCC Cell Transport Pseudowire

        A 1-to-1 VCC cell transport pseudowire maps one ATM virtual channel connection (VCC) to a single pseudowire. Complete these steps to configure a 1-to-1 pseudowire.


        Note

        Multiple 1-to-1 VCC pseudowire mapping on an interface is supported.

        Mapping a Single PVC to a Pseudowire

        To map a single PVC to an ATM over MPLS pseudowire, use the xconnect command at the PVC level. This configuration type uses AAL0 and AAL5 encapsulations. Complete these steps to map a single PVC to an ATM over MPLS pseudowire.


        Note

        Release 15.1(1)MR does not support mapping multiple VCCs to a pseudowire.

        SUMMARY STEPS

          1.    Router> enable

          2.    Router# configure terminal

          3.    Router(config)# interface atm0/1/ima0

          4.    Router(config-if-atm)# pvc 10/20 l2transport

          5.    Router(config-if-atm-l2trans-pvc)# encapsulation aal0

          6.    Router(config-if-atm-l2trans-pvc)# xconnect 1.1.1.1 40 encapsulation mpls

          7.    Router(config-if-atm-l2trans-pvp-xconn)# end


        DETAILED STEPS
           Command or ActionPurpose
          Step 1Router> enable  

          Enables privileged EXEC mode.

           
          Step 2Router# configure terminal  

          Enters global configuration mode.

           
          Step 3Router(config)# interface atm0/1/ima0  

          Configures the ATM IMA interface.

           
          Step 4Router(config-if-atm)# pvc 10/20 l2transport  

          Defines a PVC. Use the l2transport keyword to configure the PVC as a layer 2 virtual circuit.

           
          Step 5Router(config-if-atm-l2trans-pvc)# encapsulation aal0  

          Defines the encapsulation type for the PVC. The default encapsulation type for the PVC is AAL5.

           
          Step 6Router(config-if-atm-l2trans-pvc)# xconnect 1.1.1.1 40 encapsulation mpls  

          Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding PVC 40 to the remote peer 1.1.1.1.

           
          Step 7Router(config-if-atm-l2trans-pvp-xconn)# end  

          Exits configuration mode.

           

          Configuring N-to-1 VCC Cell Transport Pseudowire

          An N-to-1 VCC cell transport pseudowire maps one or more ATM virtual channel connections (VCCs) to a single pseudowire. Complete these steps to configure an N-to-1 pseudowire.

          SUMMARY STEPS

            1.    Router> enable

            2.    Router# configure terminal

            3.    Router(config)# interface atm0/1/1.1 multipoint

            4.    Router(config-subif)# xconnect 1.1.1.1 40 encapsulation mpls

            5.    Router(config-subif-xconn)# pvc 10/20 l2transport

            6.    Router(config-if-atm-l2trans-pvc)# pvc 0/41 l2transport

            7.    Router (config-if-atm-l2trans-pvc)# end


          DETAILED STEPS
             Command or ActionPurpose
            Step 1Router> enable  

            Enables privileged EXEC mode.

            • Enter your password if prompted.

             
            Step 2Router# configure terminal  

            Enters global configuration mode.

             
            Step 3Router(config)# interface atm0/1/1.1 multipoint  

            Configures the ATM multipoint interface.

             
            Step 4Router(config-subif)# xconnect 1.1.1.1 40 encapsulation mpls  

            Creates a pseudowire on an ATM interface. This example creates a pseudowire to the remote peer 1.1.1.1.

             
            Step 5Router(config-subif-xconn)# pvc 10/20 l2transport  

            Defines the first PVC 0/40 and maps it under the pseudowire created in Step 4. Use the l2transport keyword to configure the PVC as a layer 2 virtual circuit.

             
            Step 6Router(config-if-atm-l2trans-pvc)# pvc 0/41 l2transport  

            Defines the second PVC 0/41 and maps it under the pseudowire created in Step 4. Use the l2transport keyword to configure the PVC as a layer 2 virtual circuit.

             
            Step 7Router (config-if-atm-l2trans-pvc)# end  

            Exits configuration mode.

             

            Configuring 1-to-1 VPC Cell Transport

            A 1-to-1 VPC cell transport pseudowire maps one or more virtual path connections (VPCs) to a single pseudowire. While the configuration is similar to 1-to-1 VPC cell mode, this transport method uses the 1-to-1 VPC pseudowire protocol and format defined in RFCs 4717 and 4446. Complete these steps to configure a 1-to-1 VPC pseudowire.


            Note

            Multiple 1-to-1 VCC pseudowire mapping on an interface is supported.

            SUMMARY STEPS

              1.    Router> enable

              2.    Router# configure terminal

              3.    Router(config)# interface atm0/1/ima0

              4.    Router(config-if-atm)# atm pvp 10 l2transport

              5.    Router(config-if-atm-l2trans-pvp)# xconnect 30.30.30.2 305 encapsulation mpls

              6.    Router(config-if-atm-l2trans-pvp-xconn)# end


            DETAILED STEPS
               Command or ActionPurpose
              Step 1Router> enable  

              Enables privileged EXEC mode.

              • Enter your password if prompted.

               
              Step 2Router# configure terminal  

              Enters global configuration mode.

               
              Step 3Router(config)# interface atm0/1/ima0  

              Configures the ATM IMA interface.

               
              Step 4Router(config-if-atm)# atm pvp 10 l2transport  

              Maps a PVP to a pseudowire.

               
              Step 5Router(config-if-atm-l2trans-pvp)# xconnect 30.30.30.2 305 encapsulation mpls  

              Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding the ATM circuit 305 to the remote peer 30.30.30.2.

               
              Step 6Router(config-if-atm-l2trans-pvp-xconn)# end  

              Exits the configuration mode.

               

              Configuring ATM AAL5 SDU VCC Transport

              An ATM AAL5 SDU VCC transport pseudowire maps a single ATM PVC to another ATM PVC.

              SUMMARY STEPS

                1.    Device> enable

                2.    Device# configure terminal

                3.    Device(config)# interface atm 0/1/ima0

                4.    Device(config-if)# pvc 0/12 l2transport

                5.    Device(config-if-atm-l2trans-pvc)# encapsulation aal5

                6.    Device(config-if-atm-l2trans-pvc)# xconnect 25.25.25.25 125 encapsulation mpls

                7.    Device(config)# exit


              DETAILED STEPS
                 Command or ActionPurpose
                Step 1Device> enable  

                Enables privileged EXEC mode.

                • Enter your password if prompted.

                 
                Step 2Device# configure terminal  

                Enters global configuration mode.

                 
                Step 3Device(config)# interface atm 0/1/ima0  

                Configures the ATM IMA interface.

                 
                Step 4Device(config-if)# pvc 0/12 l2transport  

                Configures a PVC and specifies a VCI or VPI.

                 
                Step 5Device(config-if-atm-l2trans-pvc)# encapsulation aal5  

                Sets the PVC encapsulation type to AAL5.

                Note   

                You must use the AAL5 encapsulation for this transport type.

                 
                Step 6Device(config-if-atm-l2trans-pvc)# xconnect 25.25.25.25 125 encapsulation mpls  

                Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding the ATM circuit 125 to the remote peer 25.25.25.25.

                 
                Step 7Device(config)# exit  

                Exits configuration mode.

                 

                Configuring Cell Packing (Optional)

                You can apply the following optional configurations to a pseudowire link.

                Cell packing allows you to improve the efficiency of ATM-to-MPLS conversion by packing multiple ATM cells into a single MPLS packet.

                SUMMARY STEPS

                  1.    Device> enable

                  2.    Device# configure terminal

                  3.    Device(config)# int atm1/0/1.1

                  4.    Device(config-if)# atm mcpt-timers 1000 2000 3000

                  5.    Device(config)# pvc 0/11 l2transport

                  6.    Device(config-if-atm-l2trans-pvc)# encapsulation aal0

                  7.    Device(config-if-atm-l2trans-pvc)# cell-packing 20 mcpt-timer 3

                  8.    Device(config-if-atm-l2trans-pvc)# end


                DETAILED STEPS
                   Command or ActionPurpose
                  Step 1Device> enable  

                  Enables privileged EXEC mode.

                  • Enter your password if prompted.

                   
                  Step 2Device# configure terminal  

                  Enters global configuration mode.

                   
                  Step 3Device(config)# int atm1/0/1.1  

                  Configures the ATM interface.

                   
                  Step 4Device(config-if)# atm mcpt-timers 1000 2000 3000  

                  Defines the three Maximum Cell Packing Timeout (MCPT) timers under an ATM interface. The three independent MCPT timers specify a wait time before forwarding a packet.

                   
                  Step 5Device(config)# pvc 0/11 l2transport    
                  Step 6Device(config-if-atm-l2trans-pvc)# encapsulation aal0    
                  Step 7Device(config-if-atm-l2trans-pvc)# cell-packing 20 mcpt-timer 3  

                  Specifies the maximum number of cells in PW cell pack and the cell packing timer that the Cisco ASR 903 Series Router uses. This example specifies 20 cells per pack and the third MCPT timer.

                   
                  Step 8Device(config-if-atm-l2trans-pvc)# end  

                  Exits the configuration mode.

                   

                  Example: ATM IMA Configuration

                  The following example shows how to add a T1/E1 interface to an ATM IMA group as a part of an ATM over MPLS pseudowire configuration. For more information about how to configure pseudowires, see Chapter 11, “Pseudowire Configuration.”


                  Note

                  This section displays a partial configuration intended to demonstrate a specific feature. 

                  
controller t1 0/0/0
 ima-group 0
 clock source line

interface atm 0/0/ima0.1 point-to-point
 pvc 1/33 l2transport
  encapsulation aal0
  xconnect 1.1.1.1 33 encapsulation mpls

                  Example: ATM over MPLS

                  VC Mode for Cell Packing Configuration

                  CE 1 Configuration

                  
interface Gig 1/1/0
no negotiation auto
load-interval 30

interface Gig 0/1/0
ip address 20.1.1.1 255.255.255.0
interface ATM4/2/4
no shut
exit
!
interface ATM 1/1/4.10 point
ip address 50.1.1.1 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 30.1.1.2 255.255.255.255 50.1.1.2

                  CE 2 Configuration

                  
interface Gig 1/0/1
no negotiation auto
load-interval 30

interface Gig 0/1/1
ip address 30.1.1.1 255.255.255.0
interface ATM6/2/1
no shut

!
interface ATM 1/0/1.10 point
ip address 50.1.1.2 255.255.255.0
pvc 20/101
encapsulation aal5snap


!
ip route 20.1.1.2 255.255.255.255 50.1.1.1

                  PE 1 Configuration

                  
interface Loopback0
ip address 192.168.37.3 255.255.255.255

!
interface ATM 0/0/1
no shut

!
interface ATM 0/0/1
atm mcpt-timers 150 1000 4095

interface ATM 0/0/0.10 point
pvc 20/101 l2transport
encapsulation aal0
cell-packing 20 mcpt-timer 1
xconnect 192.168.37.2 100 encapsulation mpls

!
interface Gig 0/1/0
no shut
ip address 40.1.1.1 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

                  PE 2 Configuration

                  
interface Loopback0
ip address 192.168.37.2 255.255.255.255
!
interface ATM 0/1/1
no shut

!
interface ATM 0/1/1
atm mcpt-timers 150 1000 4095

interface ATM 0/1/1.10 point
pvc 20/101 l2transport
encapsulation aal0
cell-packing 20 mcpt-timer 1
xconnect 192.168.37.3 100 encapsulation mpls



!
interface Gig 1/1
no shut
ip address 40.1.1.2 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

                  VP Mode for Cell Packing Configuration

                  CE 1 Configuration

                  
interface Gig 0/1/0
no negotiation auto
load-interval 30

interface Gig 0/1/0
ip address 20.1.1.1 255.255.255.0
interface ATM4/2/4


!
interface ATM 0/1/4.10 point
ip address 50.1.1.1 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 30.1.1.2 255.255.255.255 50.1.1.2

                  CE 2 Configuration

                  
!
interface Gig 1/1
no negotiation auto
load-interval 30

interface Gig 1/1
ip address 30.1.1.1 255.255.255.0
interface ATM6/2/1
no shut

!
interface ATM 1/0/1.10 point
ip address 50.1.1.2 255.255.255.0
pvc 20/101
encapsulation aal5snap


!
ip route 20.1.1.2 255.255.255.255 50.1.1.1

                  PE 1 Configuration

                  
interface Loopback0
ip address 192.168.37.3 255.255.255.255

!
interface ATM 0/0/0
no shut

!
interface ATM 0/0/0
atm mcpt-timers 150 1000 4095

interface ATM 0/0/0.50 multipoint
atm pvp 20 l2transport
cell-packing 10 mcpt-timer 1
xconnect 192.168.37.2 100 encapsulation mpls



!
interface Gig 0/1/0
no shut
ip address 40.1.1.1 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

                  PE 2 Configuration

                  
!
interface Loopback0
ip address 192.168.37.2 255.255.255.255

!
interface ATM 0/1/1
no shut

!
interface ATM 0/1/1
atm mcpt-timers 150 1000 4095

interface ATM 0/1/1.50 multipoint
atm pvp 20 l2transport
cell-packing 10 mcpt-timer 1
xconnect 192.168.37.3 100 encapsulation mpls



!
interface Gig 1/1
no shut
ip address 40.1.1.2 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

                  VC Mode for Cell Relay Configuration

                  CE 1 Configuration

                  
!
interface gigabitethernet 0/1/0
no negotiation auto
load-interval 30

interface gigabitethernet 0/1/0
ip address 20.1.1.1 255.255.255.0
!
interface ATM 1/0/4
!
interface ATM 1/0/4.10 point
ip address 50.1.1.1 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 30.1.1.2 255.255.255.255 50.1.1.2
!

                  CE 2 Configuration

                  
interface gigabitethernet 1/0
no negotiation auto
load-interval 30

interface gigabitethernet 1/0
ip address 30.1.1.1 255.255.255.0
interface ATM6/2/1
!
interface ATM 1/0/1.10 point
ip address 50.1.1.2 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 20.1.1.2 255.255.255.255 50.1.1.1

                  PE 1 Configuration

                  
!
interface Loopback0
ip address 192.168.37.3 255.255.255.255
!
interface ATM0/0/0
!

interface ATM 0/0/0.10 point
pvc 20/101 l2transport
encapsulation aal0
xconnect 192.168.37.2 100 encapsulation mpls
!
interface gigabitethernet 0/1/0
ip address 40.1.1.1 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

                  PE 2 Configuration

                  
!
interface Loopback0
ip address 192.168.37.2 255.255.255.255
!
interface ATM 0/1/1
!
interface ATM 0/1/1.10 point
pvc 20/101 l2transport
encapsulation aal0
xconnect 192.168.37.3 100 encapsulation mpls

!
interface gigabitethernet 1/0
ip address 40.1.1.2 255.255.0.0
mpls ip
!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

                  VP Mode for Cell Relay Configuration

                  CE 1 Configuration

                  
!
interface gigabitethernet 1/0/0
no negotiation auto
load-interval 30

interface gigabitethernet 1/1/0
ip address 20.1.1.1 255.255.255.0
!
interface ATM 1/0/4
!
interface ATM 1/0/4.10 point
ip address 50.1.1.1 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 30.1.1.2 255.255.255.255 50.1.1.2

                  CE 2 Configuration

                  
!
interface gigabitethernet 1/0
no negotiation auto
load-interval 30

interface gigabitethernet 1/0
ip address 30.1.1.1 255.255.255.0
interface ATM 1/0/1
!
interface ATM 1/0/1.10 point
ip address 50.1.1.2 255.255.255.0
pvc 20/101
encapsulation aal5snap
!
ip route 20.1.1.2 255.255.255.255 50.1.1.1

                  PE 1 Configuration

                  
interface Loopback0
ip address 192.168.37.3 255.255.255.255
!
!
interface ATM 0/0/0

interface ATM 0/0/0.50 multipoint
atm pvp 20 l2transport
xconnect 192.168.37.2 100 encapsulation mpls
!
interface gigabitethernet 0/1/0
ip address 40.1.1.1 255.255.0.0
mpls ip

!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

                  PE 2 Configuration

                  
interface Loopback0
ip address 192.168.37.2 255.255.255.255
!
!
interface ATM 1/0/1

interface ATM 1/0/1.50 multipoint
atm pvp 20 l2transport
xconnect 192.168.37.3 100 encapsulation mpls
!
interface gigabitethernet 1/1
ip address 40.1.1.2 255.255.0.0
mpls ip
!
mpls ip
mpls label protocol ldp
mpls ldp router-id Loopback0 force
mpls ldp graceful-restart

router ospf 1
network 40.1.0.0 0.0.255.255 area 1
network 192.168.37.0 0.0.0.255 area 1
nsf

                  Configuring ATM AAL5 over MPLS Pseudowire on a Sonet Controller

                  This section describes how to configure the ATM adaptation layer 5 (AAL5) over Multiprotocol Label Switching (MPLS) pseudowire on a Sonet controller.

                  To configure ATM AAL5 over MPLS on a SONET controller, use the following commands beginning privileged EXEC mode:

                  SUMMARY STEPS

                    1.    configure terminal

                    2.    controller sonet slot/subslot/port

                    3.    framing sdh

                    4.    Router(config-controller)# aug mapping au-4

                    5.    au-4 au-4-number tug-3 tug-3-number

                    6.    tug-2 tug-2-number e1 e1-line-number atm

                    7.    exit

                    8.    interface atm slot/subslot/port.sts-1/vtg/t1.subpoint. point-to-point

                    9.    pvc vpi/vci l2transport

                    10.    encapsulation aal5

                    11.    xconnect remote-pe-loopback ip vcid encapsulation mpls


                  DETAILED STEPS
                     Command or ActionPurpose
                    Step 1 configure terminal


                    Example: 
                    Device# configure terminal
                     

                    Enters global configuration mode from the terminal.

                     
                    Step 2controller sonet slot/subslot/port


                    Example: 
                    Device(config)# controller sonet 0/1/0
                     

                    Enters controller configuration mode to configure the SONET controller.

                     
                    Step 3framing sdh
                     

                    Specifies the framing type as Synchronous Digital Hierarchy (SDH).

                     
                    Step 4Router(config-controller)# aug mapping au-4  

                    Configures the AUG to be derived from AU-4.

                     
                    Step 5au-4 au-4-number tug-3 tug-3-number


                    Example: 
                    Device(config-controller)# au-4 1 tug-3 1
                     

                    Specifies the Administrative Unit type 4 (AU-4) and Tributary Unit group type 3 (TUG-3) numbers.

                     
                    Step 6tug-2 tug-2-number e1 e1-line-number atm


                    Example: 
                    Device(config-ctrlr-tug3)# tug-2 1 e1 1 atm
                     

                    Creates an ATM group for the AU-4

                     
                    Step 7exit
                     

                    Exits to global configuration mode.

                     
                    Step 8 interface atm slot/subslot/port.sts-1/vtg/t1.subpoint. point-to-point


                    Example: 
                    Device(config)# interface atm 0/0/0.1/1/1/1.2 point-to-point
                     

                    Enters subinterface configuration mode pertaining to the specified subinterface and specifies a point-to-point subinterface.

                     
                    Step 9pvc vpi/vci l2transport


                    Example: 
                    Device(config-subif)# pvc 10/100 l2transport
                     

                    Creates an ATM permanent virtual circuit (PVC) and enters Layer 2 transport ATM virtual circuit configuration submode.

                     
                    Step 10encapsulation aal5
                     

                    Specifies ATM AAL5 encapsulation for the PVC.

                     
                    Step 11xconnect remote-pe-loopback ip vcid encapsulation mpls


                    Example: 
                    Device(cfg-if-atm-l2trans-pvc)# xconnect 203.0.113.5 501 encapsulation mpls
                     

                    Binds the attachment circuit to a pseudowire VC.

                     

                    Configuring ATM AAL5 over MPLS Pseudowire on T1 Controller

                    This section describes how to configure the ATM adaptation layer 5 (AAL5) over Multiprotocol Label Switching (MPLS) pseudowire on a T1 controller.

                    To configure ATM AAL5 over MPLS on a T1 controller, use the following commands beginning privileged EXEC mode:

                    SUMMARY STEPS

                      1.    Router# configure terminal

                      2.    Router(config)# controller t1 slot/subslot/port

                      3.    Router(config-controller)# atm

                      4.    Router(config)# interface atm slot/subslot/port point-to-point

                      5.    Router(config-subif)# pvc vpi/vci l2transport

                      6.    Router(cfg-if-atm-l2trans-pvc)# encapsulation aal5

                      7.    Router(cfg-if-atm-l2trans-pvc)# xconnect peer-router-id vcid encapsulation mpls


                    DETAILED STEPS
                       Command or ActionPurpose
                      Step 1 Router# configure terminal  

                      Enters global configuration mode from the terminal.

                       
                      Step 2Router(config)# controller t1 slot/subslot/port

                      Example: 
                      Router(config)# controller t1 0/1/0
                       

                      Enters the controller configuration mode.

                       
                      Step 3Router(config-controller)# atm  

                      Configures the T1 interface for ATM.

                       
                      Step 4Router(config)# interface atm slot/subslot/port point-to-point

                      Example: 
                      Router(config)# interface atm 0/1/0.10 point-to-point
                       

                      Configures a subinterface and point-to-point as the interface type.

                       
                      Step 5Router(config-subif)# pvc vpi/vci l2transport

                      Example: 
                      Router(config-subif)# pvc 10/100 l2transport
                       

                      Creates an ATM permanent virtual circuit (PVC) and enters Layer 2 transport ATM virtual circuit configuration submode.

                       
                      Step 6Router(cfg-if-atm-l2trans-pvc)# encapsulation aal5  

                      Specifies ATM AAL5 encapsulation for the PVC.

                       
                      Step 7Router(cfg-if-atm-l2trans-pvc)# xconnect peer-router-id vcid encapsulation mpls

                      Example: 
                      Router(cfg-if-atm-l2trans-pvc)# xconnect 203.0.113.5 501 encapsulation mpls
                       

                      Binds the attachment circuit to a pseudowire VC.

                       

                      Configuring Service Classes on a PVC

                      This section describes how to configure different classes of service on a PVC.

                      To configure the configure different classes of service on a PVC, use the following commands beginning privileged EXEC mode:

                      SUMMARY STEPS

                        1.    Router# configure terminal

                        2.    Router(config)# controller t1 slot/subslot/port

                        3.    Router(config-controller)# atm

                        4.    Router(config)# interface atm slot/subslot/port point-to-point

                        5.    Router(config-subif)# pvc vpi/vci l2transport

                        6.    Router(cfg-if-atm-l2trans-pvc)# {cbr | ubr | ubr+ | vbr-nrt | vbr-rt}

                        • Constant Bit Rate (CBR)—The CBR service class is designed for ATM virtual circuits (VCs) that need a static amount of bandwidth that is continuously available for the duration of the active connection.
                        • Unspecified Bit Rate (UBR)—This is a service class where the network management makes no Quality of Service (QoS) commitment. It models the best-effort service that the Internet normally provides and is suitable for applications tolerant to delay and does not require real-time responses.
                        • Unspecified Bit Rate Plus—UBR+ supports a zero committed information rate (CIR) with infinite burst capabilities up to an entire T1. It allows any available network bandwidth to be continuously usable by any data application.
                        • Variable Bit Rate Non-Real Time VBR-nrt service class is used in order to transmit non-real-time applications that are bursty in nature.
                        • Variable Bit Rate Real Time—VBR-rt service class is used in order to transmit real-time data that is sensitive to time delays.


                      DETAILED STEPS
                         Command or ActionPurpose
                        Step 1 Router# configure terminal  

                        Enters global configuration mode from the terminal.

                         
                        Step 2Router(config)# controller t1 slot/subslot/port

                        Example: 
                        Router(config)# controller t1 0/1/0
                         

                        Enters the controller configuration mode.

                         
                        Step 3Router(config-controller)# atm  

                        Configures the T1 interface for ATM.

                         
                        Step 4Router(config)# interface atm slot/subslot/port point-to-point

                        Example: 
                        Router(config)# interface atm 0/1/0.10 point-to-point
                         

                        Configures a subinterface and point-to-point as the interface type.

                         
                        Step 5Router(config-subif)# pvc vpi/vci l2transport

                        Example: 
                        Router(config-subif)# pvc 10/100 l2transport
                         

                        Creates an ATM permanent virtual circuit (PVC) and enters Layer 2 transport ATM virtual circuit configuration submode.

                         
                        Step 6Router(cfg-if-atm-l2trans-pvc)# {cbr | ubr | ubr+ | vbr-nrt | vbr-rt}
                        • Constant Bit Rate (CBR)—The CBR service class is designed for ATM virtual circuits (VCs) that need a static amount of bandwidth that is continuously available for the duration of the active connection.
                        • Unspecified Bit Rate (UBR)—This is a service class where the network management makes no Quality of Service (QoS) commitment. It models the best-effort service that the Internet normally provides and is suitable for applications tolerant to delay and does not require real-time responses.
                        • Unspecified Bit Rate Plus—UBR+ supports a zero committed information rate (CIR) with infinite burst capabilities up to an entire T1. It allows any available network bandwidth to be continuously usable by any data application.
                        • Variable Bit Rate Non-Real Time VBR-nrt service class is used in order to transmit non-real-time applications that are bursty in nature.
                        • Variable Bit Rate Real Time—VBR-rt service class is used in order to transmit real-time data that is sensitive to time delays.


                        Example: 
                        Router(cfg-if-atm-l2trans-pvc)# cbr
                         

                        Configures a service class on a PVC. These are the available options:

                         

                        Configuring ATM AAL5 L3 Termination on a SONET Controller

                        This section describes how to configure the ATM AAL5 layer 3 termination on a SONET controller. This allows the use of multiple protocols over the same VC.

                        To configure the ATM AAL5 layer 3 termination on a SONET controller, use the following commands beginning privileged EXEC mode:

                        SUMMARY STEPS

                          1.    Router# configure terminal

                          2.    Router(config)# controller sonet slot/subslot/port

                          3.    Router(config-controller)# framing sdh

                          4.    Router(config-controller)# aug mapping au-4

                          5.    Router(config-controller)# au-4 au-4-number tug-3 tug-3-number

                          6.    Router(config-ctrlr-tug3)# tug-2 tug-2-number e1 e1-line-number atm

                          7.    exit

                          8.    Do one of the following:

                          • Router(config)# interface atm interface-path-id point-to-point
                          • Router(config)# interface atm port.port-adapter.subinterface-numberinterface-path-id.subinterface point-to-point

                          9.    Router(config-subif)# ip address ip-address subnet-mask

                          10.    Router(config-subif)# pvc vpi/vci

                          11.    Router(cfg-if-atm-vc)# encapsulation aal5snap


                        DETAILED STEPS
                           Command or ActionPurpose
                          Step 1 Router# configure terminal  

                          Enters global configuration mode from the terminal.

                           
                          Step 2Router(config)# controller sonet slot/subslot/port

                          Example: 
                          Router(config)# controller sonet 0/1/0
                           

                          Enters controller configuration mode to configure the SONET controller.

                           
                          Step 3Router(config-controller)# framing sdh  

                          Specifies the framing type as Synchronous Digital Hierarchy (SDH).

                           
                          Step 4Router(config-controller)# aug mapping au-4  

                          Configures the AUG to be derived from AU-4.

                           
                          Step 5Router(config-controller)# au-4 au-4-number tug-3 tug-3-number

                          Example: 
                          Router(config-controller)# au-4 1 tug-3 1
                           

                          Specifies the Administrative Unit type 4 (AU-4) and Tributary Unit group type 3 (TUG-3) numbers.

                           
                          Step 6Router(config-ctrlr-tug3)# tug-2 tug-2-number e1 e1-line-number atm

                          Example: 
                          Router(config-ctrlr-tug3)# tug-2 1 e1 1 atm
                           

                          Creates an ATM group for the AU-4

                           
                          Step 7exit
                           

                          Exits to global configuration mode.

                           
                          Step 8Do one of the following:
                          • Router(config)# interface atm interface-path-id point-to-point
                          • Router(config)# interface atm port.port-adapter.subinterface-numberinterface-path-id.subinterface point-to-point


                          Example: 
                          Router(config)# interface atm 0/0/0.1/1/1/1 point-to-point
                          Router(config)# interface atm 0/0/0.1/1/1/1.2 point-to-point
                           

                          Specifies the ATM interface using the appropriate format of the interface atm command. You can configure a port or a subport.

                           
                          Step 9Router(config-subif)# ip address ip-address subnet-mask

                          Example: 
                          Router(config-subif)# ip address 203.0.113.2 255.255.255.0
                           

                          Configures an IP address to the ATM interface.

                           
                          Step 10Router(config-subif)# pvc vpi/vci

                          Example: 
                          pvc 10/100
                           

                          Creates an ATM permanent virtual circuit (PVC).

                           
                          Step 11Router(cfg-if-atm-vc)# encapsulation aal5snap  

                          Specifies ATM AAL5 encapsulation for the PVC.

                           

                          Configuring ATM AAL5 Layer 3 Termination on a T1 Controller

                          This section describes how to configure the ATM AAL5 layer 3 termination on a T1 controller. This feature enables the Cisco ASR 903 router to process the ATM packets so that the ATM packets can terminate at the router.

                          To configure the ATM AAL5 layer 3 termination on a T1 controller, use the following commands beginning privileged EXEC mode:

                          SUMMARY STEPS

                            1.    Router# configure terminal

                            2.    Router(config)# controller t1 slot/subslot/port

                            3.    Router(config-controller)# atm

                            4.    exit

                            5.    Do one of the following:

                            • Router(config)# interface atm slot/subslot/port.subinterface point-to-point
                            • Router(config)# interface atm slot/subslot/port

                            6.    Router(config-subif)# ip address ip-address subnet-mask

                            7.    Router(config-subif)# pvc vpi/vci

                            8.    Router(cfg-if-atm-vc)# encapsulation aal5snap


                          DETAILED STEPS
                             Command or ActionPurpose
                            Step 1 Router# configure terminal  

                            Enters global configuration mode from the terminal.

                             
                            Step 2Router(config)# controller t1 slot/subslot/port

                            Example: 
                            Router(config)# controller t1 0/1/0
                             

                            Enters the controller configuration mode and configures the t1 controller.

                             
                            Step 3Router(config-controller)# atm  

                            Configures the T1 interface for ATM.

                             
                            Step 4exit  

                            Exits to global configuration mode.

                             

                            Step 5Do one of the following:
                            • Router(config)# interface atm slot/subslot/port.subinterface point-to-point
                            • Router(config)# interface atm slot/subslot/port


                            Example: 
                            Router(config)# interface atm 0/1/0.10 point-to-point
                            Router(config)# interface atm 0/1/1 point-to-point
                             

                            Specifies the ATM interface using the appropriate format of the interface atm command. You can configure a port or a subport.

                             
                            Step 6Router(config-subif)# ip address ip-address subnet-mask

                            Example: 
                            ip address 203.0.113.1 255.255.255.0
                             

                            Configures an IP address to the ATM interface.

                             
                            Step 7Router(config-subif)# pvc vpi/vci

                            Example: 
                            Router(config-subif)# pvc 10/100
                             

                            Creates an ATM permanent virtual circuit (PVC).

                             
                            Step 8Router(cfg-if-atm-vc)# encapsulation aal5snap  

                            Specifies ATM AAL5 encapsulation for the PVC.

                             

                            Example QoS Exp Marking on ATM Layer 2 Interfaces

                            This section provides examples for configuring QoS Exp Marking on ATM Layer 2 Interfaces.

                            Example Configuring QoS Exp Marking on PVC Pseudowire

                            The following example shows how to configure QoS Exp Marking on PVC Pseudowire. 

                            Policy-map mark_exp_5
class class-default
set mpls exp imposition 5
interface atm 0/1/1.1 point-to-point
pvc 10/100 l2transport
xconnect 1.1.1.1 200 encapsulation mpls
service-policy input mark_exp_5
pvc 20/111 l2transport
xconnect 1.1.1.1 200 encapsulation mpls
service-policy input mark_exp_5

                            Example Configuring QoS Exp Marking on PVP Pseudowire

                            The following example shows how to configure QoS Exp Marking on PVP Pseudowire. 

                            Policy-map mark_exp_5
class class-default
set mpls exp imposition 5
interface ATM0/1/2
atm pvp 10
xonnect 1.1.1.1 400 encapsulation mpls
service-policy input mark_exp_5

                            Example Configuring QoS Exp Marking on N:1 Pseudowire

                            The following example shows how to configure QoS Exp Marking on N:1 Pseudowire. 

                            Policy-map mark_exp_5
class class-default
set mpls exp imposition 5
interface atm 0/3/2.1 multipoint 
xconnect 11.1.1.1 400 encapsulation mpls
service-policy input mark_exp_5
pvc 10/122
pvc 120/122

                            PE Configuration Example Configuring Cell Packing

                            The following example shows how to configure Cell Packing. 

                            interface ATM0/4/11
no ip address
atm mcpt-timers 51150 51150 51150 
no atm enable-ilmi-trap
end
interface ATM0/4/11.1 multipoint
no atm enable-ilmi-trap
cell-packing 28 mcpt-timer 1
xconnect 11.11.11.11 30 encapsulation mpls
pvc 20/10 l2transport
!
pvc 21/11 l2transport
!
pvc 22/12 l2transport
!
pvc 23/13 l2transport
!
pvc 24/14 l2transport
!
pvc 25/15 l2transport
!
pvc 26/16 l2transport
!
pvc 27/17 l2transport