The Frame Relay (FR) to ATM service interworking function allows communication between an FR end user and an ATM end user. It is based on the Frame Relay Forum (FRF.8) implementation agreement, which specifies that an FR end station may communicate with an ATM end station provided that there is a router performing the specifications given in FRF.8 in the software between the two end stations.
This document presents a sample configuration of FR to ATM service interworking using FRF.8 (translation mode) on the LightStream 1010. This configuration also works on the Catalyst 8510 MSR or 8540 MSR.
There are no specific requirements for this document.
The information in this document is based on Cisco IOS® 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.
For more information on document conventions, refer to Cisco Technical Tips Conventions.
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) .
This document uses this network setup:
The FR traffic shaping parameters used in this sample configuration in Router 1 are:
Committed information rate (CIR) = 64 kbps
Committed burst (Bc) = 8000
Excess burst (Be) = 8000
Note: For a detailed explanation on how to troubleshoot Frame Relay Traffic shaping connections, refer to show Commands for Frame Relay Traffic Shaping.
This document uses these configurations:
Note: These configurations contain information relevant only for Frame Relay to ATM Service Interworking.
Router 1 |
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controller E1 5/0 channel-group 30 timeslots 1-31 ! interface Serial5/0:30 ip address 12.12.12.2 255.255.255.0 no ip directed-broadcast encapsulation frame-relay IETF !--- The FR encapsulation used is IETF. It should match the switch. no fair-queue frame-relay traffic-shaping !--- Enabling FR traffic shaping on this interface. frame-relay class test-iwf frame-relay map ip 12.12.12.1 123 broadcast ! map-class frame-relay test-iwf no frame-relay adaptive-shaping !--- Traffic shaping parameters configured. frame-relay cir 64000 frame-relay bc 8000 frame-relay be 8000 |
ATM Switch |
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frame-relay connection-traffic-table-row index 123 64000 8000 128000 8000 vbr-nrt 123 ! controller E1 4/0/0 clock source free-running channel-group 30 timeslots 1-31 ! interface Serial4/0/0:30 no ip address no ip directed-broadcast encapsulation frame-relay IETF !--- The FR encapsulation used is IETF. no arp frame-relay frame-relay intf-type dce !--- Interface type is dce, because it is providing clocking. frame-relay pvc 123 rx-cttr 123 tx-cttr 123 service translation interface ATM0/0/0 0 123 !--- This command makes the translation from !--- Frame Relay to ATM PVC 123. |
Router 2 |
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interface ATM2/0.123 point-to-point ip address 12.12.12.1 255.255.255.0 no ip directed-broadcast pvc 0/123 !--- Configured ATM PVC 0/123 with traffic shaping and !--- oam-pvc management enabled. vbr-nrt 163 81 49 broadcast oam-pvc manage encapsulation aal5snap |
The traffic shaping parameters on Router 2 can be obtained from the Frame Relay connection traffic table on the ATM Switch (see the section).
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-relay lmi
show frame-relay map
show frame-relay pvc
show atm vc interface atm 0/0/0
show frame-relay connection-traffic-table-row
show atm connection-traffic-table
show frame-relay interface resource serial 4/0/0:30 all-information
The output shown below is a result of entering the above commands on the devices shown in the network diagram. This output shows that the network is operating properly.
Note: When connecting a Cisco router to a third-party connection, it is preferable to use Internet Engineering Task Force (IETF) Local Management Interface (LMI). Notice that the LMI is Cisco and the Frame Relay is DTE as it is receiving clocking from the switch.
Router1# show frame-relay lmi LMI Statistics for interface Serial5/0:30 (Frame Relay DTE) LMI TYPE = CISCO Invalid Unnumbered info 0 Invalid Prot Disc 0 Invalid dummy Call Ref 0 Invalid Msg Type 0 Invalid Status Message 0 Invalid Lock Shift 0 Invalid Information ID 0 Invalid Report IE Len 0 Invalid Report Request 0 Invalid Keep IE Len 0 Num Status Enq. Sent 1222 Num Status msgs Rcvd 1222 Num Update Status Rcvd 0 Num Status Timeouts 2
To verify that the dlci is up and mapped to the correspondent IP address, use the show frame-relay map command.
Router1# show frame-relay map Serial5/0:30 (up): ip 12.12.12.1 dlci 123(0x7B,0x1CB0), static, broadcast, IETF, status defined, active
To check the status of the Frame Relay pvc, use the show frame-relay pvc command. In the output below we can see that It is active.
Router1# show frame-relay pvc PVC Statistics for interface Serial5/0:30 (Frame Relay DTE) Active Inactive Deleted Static Local 1 0 0 0 Switched 0 0 0 0 Unused 0 0 0 0 DLCI = 123, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial5/0:30 input pkts 786 output pkts 549 in bytes 742312 out bytes 684503 dropped pkts 6 in FECN pkts 0 in BECN pkts 0 out FECN pkts 0 out BECN pkts 0 in DE pkts 0 out DE pkts 0 out bcast pkts 1 out bcast bytes 608 pvc create time 03:25:16, last time pvc status changed 03:09:30
Note: The term ATM-PX/Y/Z refers to pseudo interface.
ATMswitch# show atm vc interface atm 0/0/0 Interface VPI VCI Type X-Interface X-VPI X-VCI Encap Status ATM0/0/0 0 5 PVC ATM2/0/0 0 43 QSAAL UP ATM0/0/0 0 16 PVC ATM2/0/0 0 35 ILMI UP ATM0/0/0 0 101 PVC ATM0/1/0 0 101 UP ATM0/0/0 0 102 PVC ATM0/1/0 0 102 UP ATM0/0/0 0 123 PVC ATM-P4/0/0 30 155 UP
To display the Frame Relay to ATM connections in the switch, use the show frame-relay connection-traffic-table-row command, as shown below:
ATMswitch# show frame-relay connection-traffic-table-row Row cir bc be pir fr-atm Service-category ATM Row 100 64000 32768 32768 64000 vbr-nrt 100 123 64000 8000 8000 128000 vbr-nrt 123 ATMswitch# show atm connection-traffic-table Row Service-category pcr scr/mcr mbs cdvt 1 ubr 7113539 none none 2 cbr 424 none 3 vbr-rt 424 424 50 none 4 vbr-nrt 424 424 50 none 5 abr 424 0 none 6 ubr 424 none none 10 cbr 50000 none 11 cbr 1000 none 12 cbr 11700 none 100 vbr-nrt 81 81-0 50 none 123 vbr-nrt 163 81-0 49 none <-- (*) 2147483645* ubr 0 none none 2147483646* ubr 1 none none 2147483647* ubr 7113539 none none
(*) When you create the frame-relay connection-traffic-table-row, you associate an ATM table row index where the ATM traffic shaping parameters are automatically calculated using the Broadband Inter-Carrier Interface (B-ICI) specification, V2.0 (See formulas).
ATMswitch# show frame-relay interface resource serial 4/0/0:30 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 Available bit rates (in bps): 1920000 vbr-nrt RX, 1920000 vbr-nrt TX 1920000 abr RX, 1920000 abr TX 1920000 ubr RX, 1920000 ubr TX Overbooking: disabled Resource Management state: Allocated bit rates (in bps): 64000 vbr-nrt RX, 64000 vbr-nrt TX 0 abr RX, 0 abr TX 0 ubr RX, 0 ubr TX Actual allocated bit rates (in bps): 64000 vbr-nrt RX, 64000 vbr-nrt TX 0 abr RX, 0 abr TX 0 ubr RX, 0 ubr TX
There is currently no specific troubleshooting information available for this configuration.
Revision | Publish Date | Comments |
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1.0 |
29-Aug-2018 |
Initial Release |