ATM to Frame Relay Interworking

Introduction

The Frame Relay to ATM network interworking function allows Frame Relay traffic to be transported through an ATM network. Based on the Frame Relay Forum (FRF.5) implementation agreement, it enables two Frame Relay end stations to communicate with each other through an ATM network.

This document presents a sample configuration of Frame Relay to ATM network interworking using FRF.5 on the LightStream 1010. This configuration also works on the Catalyst 8510 MSR or 8540 MSR.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on Cisco IOS^® Software Release 12.0(3c)W5(9).

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

For more information on document conventions, refer to Cisco Technical Tips Conventions.

Configure

In this section, you are presented with the information to configure the features described in this document.

Note: To find additional information on the commands used in this document, use the Command Lookup Tool (registered customers only) .

Network Diagram

This document uses this network setup:

The Frame Relay traffic shaping parameters used in this sample configuration are:

• Committed information rate (CIR) = 64 kbps

• Committed burst (Bc) = 8000

• Excess burst (Be) = 8000

Configurations

This document uses these configurations:

• Router 1

• ATM Switch 1

• ATM Switch 2

• Router 2

Note: The following configurations contain only relevant information.

controller E1 5/0 
 channel-group 1 timeslots 1-15 
! 
interface Serial5/0:1 
 ip address 13.13.13.2 255.255.255.0 
 no ip directed-broadcast 
 encapsulation frame-relay 
 no fair-queue 
 frame-relay traffic-shaping 
 frame-relay class test-iwf 
 frame-relay map ip 13.13.13.1 124 
! 
map-class frame-relay test-iwf 
 no frame-relay adaptive-shaping 
 frame-relay cir 64000 
 frame-relay bc 8000 
 frame-relay be 8000

! 
controller E1 4/0/0 
 clock source free-running 
 channel-group 1 timeslots 1-15 
! 
interface Serial4/0/0:1 
 no ip address 
 no ip directed-broadcast 
 encapsulation frame-relay IETF 
 no arp frame-relay 
 frame-relay intf-type dce 
 frame-relay pvc 124 rx-cttr 124 tx-cttr 124 network interface ATM0/1/1 0 124

frame-relay connection-traffic-table-row index 124 64000 8000 128000 8000 abr 124 
! 
controller E1 4/1/0 
 channel-group 1  timeslots 1-15 
! 
interface Serial4/1/0:1 
 no ip address 
 no ip directed-broadcast 
 encapsulation frame-relay IETF 
 no arp frame-relay 
 frame-relay intf-type dce 
 frame-relay pvc 124 rx-cttr 124 tx-cttr 124 network interface ATM0/1/1 0 124

controller E1 4/0 
 channel-group 1 timeslots 1-15 
! 
interface Serial4/0:1 
 ip address 13.13.13.1 255.255.255.0 
 no ip directed-broadcast 
 encapsulation frame-relay IETF 
 ip mroute-cache 
 frame-relay traffic-shaping 
 frame-relay class test-iwf 
 frame-relay map ip 13.13.13.2 124 
! 
map-class frame-relay test-iwf 
 frame-relay cir 64000 
 frame-relay bc 8000 
 frame-relay be 8000 
 no frame-relay adaptive-shaping

Verify

This section provides information you can use to confirm your configuration is working properly.

Certain show commands are supported by the Output Interpreter Tool (registered customers only) , which allows you to view an analysis of show command output.

• show frame connection-traffic-table-row

• show atm connection-traffic-table

• show atm vc interface atm 0/1/1

• show frame-relay interface resource serial 4/0/0:1 all-information

The output shown below is a result of issuing these commands on the devices shown in the network diagram. This output shows that the network is operating properly.

Note: The term ATM-PX/Y/Z means pseudo interface.

ATMswitch1# show frame-relay connection-traffic-table-row 
Row           cir       bc      be      pir      fr-atm Service-category      ATM Row  
124          64000     8000    8000    128000               abr                124       
 
ATMswitch1# show atm connection-traffic-table 
Row      Service-category    pcr        scr/mcr       mbs        cdvt
124          abr             173          90                     none

ATMswitch1# show atm vc interface atm 0/1/1
Interface         VPI  VCI   Type   X-Interface      X-VPI X-VCI Encap  Status 
ATM0/1/1          0    5     PVC    ATM2/0/0          0    48    QSAAL  UP
ATM0/1/1          0    16    PVC    ATM2/0/0          0    40    ILMI   UP
ATM0/1/1          0    18    PVC    ATM2/0/0          0    74    PNNI   UP
ATM0/1/1          0    34    PVC    ATM2/0/0          0    73    NCDP   UP
ATM0/1/1          0    124   PVC    ATM-P4/0/0        1    156          UP

ATMswitch1# show frame-relay interface resource serial 4/0/0:1 all-information 
Encapsulation: FRAME-RELAY
Resource Management configuration:
    Input queues (PAM to switch fabric):
       Discard threshold: 87% vbr-nrt, 87% abr, 87% ubr
       Marking threshold: 75% vbr-nrt, 75% abr, 75% ubr
    Output queues (PAM to line):
       Discard threshold: 87% vbr-nrt, 87% abr, 87% ubr
       Marking threshold: 75% vbr-nrt, 75% abr, 75% ubr
    Overflow servicing for VBR: enabled
    Overbooking: disabled
Resource Management state:
  Available bit rates (in bps):
     896000 vbr-nrt RX, 896000 vbr-nrt TX
     896000 abr RX, 896000 abr TX
     896000 ubr RX, 896000 ubr TX
  Allocated bit rates (in bps):
     0 vbr-nrt RX, 0 vbr-nrt TX
     64000 abr RX, 64000 abr TX
     0 ubr RX, 0 ubr TX
  Actual allocated bit rates (in bps):
     0 vbr-nrt RX, 0 vbr-nrt TX
     64000 abr RX, 64000 abr TX
     0 ubr RX, 0 ubr TX

Troubleshoot

There is currently no specific troubleshooting information available for this configuration.

Related Information

• Frame Relay Forum (FRF.5)
• ATM to Frame Relay Interworking Technology Support
• ATM Technology Support
• Technical Support & Documentation - Cisco Systems