Frame Relay-to-ATM
Service Interworking (FRF.8)

This feature module describes the Frame Relay-to-ATM Service Interworking (FRF.8) feature. It includes information on the benefits, supported platforms, related documents, and so on.

This feature module includes the following sections:

Feature Overview

To communicate over WANs, end-user stations and the network cloud typically must use the same type of transmission protocol. This limitation has prevented differing networks such as Frame Relay and ATM from being linked. However, the Frame Relay-to-ATM Service Interworking (FRF.8) feature allows Frame Relay and ATM networks to exchange data, despite differing network protocols. The functional requirements for linking Frame Relay and ATM networks are provided by the Frame Relay/ATM PVC Service Interworking Implementation Agreement specified in Frame Relay Forum (FRF) document number FRF.8.

FRF.8 provides service interworking functionality that allows a Frame Relay end user to communicate with an ATM end user. Traffic is translated by a protocol converter that provides communication between dissimilar Frame Relay and ATM equipment. Figure 1 illustrates this concept.

Figure 1: Frame Relay-to-ATM Service Interworking (FRF.8)

FRF.8 describes a one-to-one mapping between a Frame Relay and an ATM PVC.

The Frame Relay-to-ATM Service Interworking (FRF.8) feature benefits Internet service providers that need to link Frame Relay and ATM networks, especially those networks with ATM backbones and Frame Relay end users.

Restrictions

Some service interworking functions defined by FRF.8 are not supported or are not implemented in Cisco IOS Release 12.1(2)T. See the "Supported Standards, MIBs, and RFCs" section for a summary of the FRF.8 standards and Cisco support for these standards in Release 12.1(2)T.

Supported Platforms

The Frame Relay-to-ATM Service Interworking (FRF.8) feature is supported on the following platforms and interfaces:

Cisco MC3810: T1/E1 ATM interface
Cisco 3600 series routers: OC-3 and inverse multiplexing over ATM (IMA) network modules
Cisco 2600 series routers: OC-3 and IMA network modules

Supported Standards, MIBs, and RFCs

Standards

This section compares the networking standards defined in Frame Relay Forum Document Number FRF.8, Frame Relay/ATM PVC Service Interworking Implementation Agreement with those defined for the Cisco Frame Relay-to-ATM Service Interworking (FRF.8) feature.

The following sections and subsections in the FRF.8 agreement are supported as follows:

5.1 Traffic Management: There is no direct mapping between the Frame Relay and ATM traffic parameters; these parameters are configured independently.
5.2 Frame Relay PVC Management Procedures: Procedures for the asynchronous status message defined in Q.933 annex A are not supported.
5.3.1.4 Fragmentation and Reassembly: Fragmentation and reassembly are not supported.
5.4 Address Resolution: The IP and IPX protocols are supported.
6.0 Operations for the Common Part of the AAL Type 5: The error counters mentioned in this section are reset at startup, and are counted until they are reset.

MIBs

None

For descriptions of supported MIBs and how to use MIBs, see the Cisco MIB web site on CCO at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.

RFCs

None

Configuration Tasks

See the following sections for configuration tasks for the Frame Relay-to-ATM Service Interworking (FRF.8) feature. Each task in the list is identified as either optional or required.

Configuring an FRF.8 Service Interworking Connection (Required)

Configuring an FRF.8 Service Interworking Connection

To configure FRF.8 one-to-one protocol mapping between a Frame Relay end user and an ATM end user, use the following commands beginning in global configuration command mode:

Command Purpose

Step 1

Router(config)#interface serialnumber
Configures the Frame Relay interface and enters interface configuration mode.

Step2

Router(config-if)#frame-relay interface-dlci dlci switched
Configures a switched Frame Relay DLCI.

Step3

Router(config)#interface atmnumber
Configures the ATM interface and enters interface configuration mode.

Step4

Router(config-if)#pvc [PVC-name] vpi/vci
Creates the ATM PVC and virtual path identifier/virtual channel identifier (VPI/VCI). The VCI is a 16-bit field in the header of the ATM cell.

Step5

Router(config-if)#encapsulation aal5mux fr-atm-srv
Configures the ATM adaption layer (AAL) and encapsulation type for the ATM PVC.

Step6

Router(config)#connect connection-name FR-interface FR-DLCI ATM-interface ATM-vpi/vci service-interworking
Creates a connection to connect the Frame Relay DLCI to the ATM PVC and configures FRF.8 encapsulation.

Step7

Router(config-frf8)#clp-bit {0 | 1 | map-de}
or

Router(config-frf8)#de-bit {0 | 1 | map-clp}
or

Router(config-frf8)#efci-bit {0 | map-fecn}
Sets the ATM cell loss priority (CLP) field in the ATM cell header.

Sets the Frame Relay discard eligible (DE) bit field in the Frame Relay cell header.

Sets the explicit forward congestion indication (EFCI) bit field in the ATM cell header.

Step8

Router(config-frf8)#service translation
Enables upper layer user protocol encapsulation for Frame Relay-to-ATM service interworking.

Step9

Router(config-frf8)#end
Ends configuration mode and enters EXEC mode.

Use the exit command to exit a submode and reenter global configuration command mode.

	Command	Purpose
Step 1	Router(config)#interface serialnumber	Configures the Frame Relay interface and enters interface configuration mode.
Step2	Router(config-if)#frame-relay interface-dlci dlci switched	Configures a switched Frame Relay DLCI.
Step3	Router(config)#interface atmnumber	Configures the ATM interface and enters interface configuration mode.
Step4	Router(config-if)#pvc `[`PVC-name`]` vpi/vci	Creates the ATM PVC and virtual path identifier/virtual channel identifier (VPI/VCI). The VCI is a 16-bit field in the header of the ATM cell.
Step5	Router(config-if)#encapsulation aal5mux fr-atm-srv	Configures the ATM adaption layer (AAL) and encapsulation type for the ATM PVC.
Step6	Router(config)#connect connection-name FR-interface FR-DLCI ATM-interface ATM-vpi/vci service-interworking	Creates a connection to connect the Frame Relay DLCI to the ATM PVC and configures FRF.8 encapsulation.
Step7	Router(config-frf8)#clp-bit {0 \| 1 \| map-de} or `Router(config-frf8)#`de-bit `{`0 `\|` 1 `\|` map-clp`}` or `Router(config-frf8)#`efci-bit `{`0 `\|` map-fecn`}`	Sets the ATM cell loss priority (CLP) field in the ATM cell header. Sets the Frame Relay discard eligible (DE) bit field in the Frame Relay cell header. Sets the explicit forward congestion indication (EFCI) bit field in the ATM cell header.
Step8	Router(`config-frf8`)#service translation	Enables upper layer user protocol encapsulation for Frame Relay-to-ATM service interworking.
Step9	Router(`config-frf8`)#end	Ends configuration mode and enters EXEC mode. Use the exit command to exit a submode and reenter global configuration command mode.

To disconnect the FRF.8 interworking connection, use the shutdown connect subcommand.

Verifying Configuration

To verify correct configuration of the Frame Relay-to-ATM Service Interworking (FRF.8) feature, perform the following tasks:

Step 1 Enter the show connect id EXEC command to view information, including interworking parameters set, about the specified connection identifier:

C3640# show connect id 10
 
FR/ATM Service Interworking Connection: service-1
  Status    - UP
  Segment 1 - Serial1/0 DLCI 16
  Segment 2 - ATM3/0 VPI 1 VCI 32
Interworking Parameters -
    service translation
    efci-bit 0
    de-bit map-clp
    clp-bit map-de

Step 2 Enter the show connect port EXEC command to view information about the connection on a specific interface:

C3640# show connect port atm3/0
 
ID   Name               Segment 1            Segment 2           State
========================================================================
10   service-1         Serial1/0 16         ATM3/0 1/32          UP

Step 3 Enter the show frame-relay pvc EXEC command to view statistics about Frame Relay interfaces:

C3640# show frame-relay pvc
 
PVC Statistics for interface Serial1/0 (Frame Relay DCE)
 
              Active     Inactive      Deleted       Static
  Local          0            0            0            0
  Switched       1            0            0            0
  Unused         0            0            0            0
 
DLCI = 18, DLCI USAGE = FRF.5, PVC STATUS = ACTIVE, INTERFACE =
Serial1/0
 
  input pkts 22            output pkts 21           in bytes 2140
  out bytes 2110           dropped pkts 0           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 0          out bcast bytes 0            Num Pkts
Switched 22
  pvc create time 02:02:49, last time pvc status changed 02:02:42

Step 4 Enter the show atm pvc EXEC command to view ATM PVCs and statistics:

C3640# show atm pvc
 
            VCD /                                      Peak  Avg/Min
Burst
Interface   Name       VPI   VCI  Type   Encaps   SC   Kbps   Kbps  
Cells  Sts
3/0        10           1    32   PVC    FRATMSRV UBR 
155000                UP

Monitoring and Maintaining Frame Relay-to-ATM Interworking

To display status of the virtual circuits and the Frame Relay-to-ATM interworking connections, use any of the following commands in EXEC mode:

Command Purpose

Router#show atm pvc [signalling | interface | vcd]
Displays all ATM PVCs, switched virtual circuits (SVCs), and traffic information. Use the signalling keyword to display ATM interface signalling information for all interfaces. Use the interface keyword to display all PVCs and SVCs on the interface or subinterface. Use the vcd argument to specify the ATM VCD number (1-1023) about which to display information.

Router#show connect [all | element | ID | name | port]
Displays connection statistics. Use the optional all keyword to display statistics about all connections. Use the optional element, ID, name, or port arguments to display particular connection details.

Command	Purpose
Router#show atm pvc [signalling \| interface \| vcd]	Displays all ATM PVCs, switched virtual circuits (SVCs), and traffic information. Use the signalling keyword to display ATM interface signalling information for all interfaces. Use the interface keyword to display all PVCs and SVCs on the interface or subinterface. Use the vcd argument to specify the ATM VCD number (1-1023) about which to display information.
Router#show connect [all \| element \| ID \| name \| port]	Displays connection statistics. Use the optional all keyword to display statistics about all connections. Use the optional element, ID, name, or port arguments to display particular connection details.

Configuration Example

This section provides the following configuration example:

FRF.8 Service Interworking Example

FRF.8 Service Interworking Example

The following example shows how to configure an FRF.8 service interworking connection:

   ;
   ; Configure a switched Frame Relay DLCI
   ;
interface serial 0
    frame-relay interface-dlci 100 switched
 
   ;
   ; Configure ATM PVC with FRF.8 encapsulation
   ;
interface atm1/0
    pvc 0/32
        encapsulation aal5mux fr-atm-srv
   ;
   ; Create a connection that connects Frame Relay DLCI 100 to ATM PVC 1/32
   ;
connect service-1 Serial0 100 ATM3/0 1/32 service-interworking
    efci-bit map-fecn

Command Reference

This section documents the following new and modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.1 command reference publications.

clp-bit
connect (FR-ATM)
de-bit
efci-bit
frame-relay interface-dlci switched (FR-ATM)
service translation
show connect
shutdown

clp-bit

To set the ATM cell loss priority (CLP) field in the ATM cell header, use the clp-bit connect submode command. To disable ATM CLP bit mapping, use the no form of this command.

clp-bit {0 | 1 | map-de}

no clp-bit {0 | 1 | map-de}

Syntax Description

0

The CLP field in the ATM cell header is always set to 0.

1

The CLP field in the ATM cell header is always set to 1.

map-de

The discard eligible (DE) field in the Frame Relay header is mapped to the CLP field in the ATM cell header.

0	The CLP field in the ATM cell header is always set to 0.
1	The CLP field in the ATM cell header is always set to 1.
map-de	The discard eligible (DE) field in the Frame Relay header is mapped to the CLP field in the ATM cell header.

Defaults

The default is set to map-de.

Command Modes

FRF.8 connect submode

Command History

Release Modification

12.1(2)T

This command was introduced.

Release	Modification
12.1(2)T	This command was introduced.

Usage Guidelines

This command maps from Frame Relay to ATM.

Examples

The following example sets the CLP field in the ATM header to 1 for FRF.8:

C3640(config)# connect service-1 Serial1/0 16 ATM3/0 1/32 service-interworking
C3640(config-frf8)# clp-bit 1

Related Commands

Command Description

connect (FR-ATM)

Connects a Frame Relay DLCI to an ATM PVC.

de-bit

Sets the Frame Relay DE bit field in the Frame Relay cell header.

efci-bit

Sets the EFCI bit field in the ATM cell header.

Command	Description
connect (FR-ATM)	Connects a Frame Relay DLCI to an ATM PVC.
de-bit	Sets the Frame Relay DE bit field in the Frame Relay cell header.
efci-bit	Sets the EFCI bit field in the ATM cell header.

connect (FR-ATM)

To configure an FRF.8 one-to-one mapping between a Frame Relay data-link connection identifier (DLCI) and an ATM permanent virtual circuit (PVC), use the connect global configuration command. To remove a connection, use the no form of this command.

connect connection-name {FR-interface FR-DLCI | ATM-interface ATM-VPI/VCI} service-interworking

no connect connection-name {FR-interface FR-DLCI | ATM-interface ATM-VPI/VCI} service-interworking

Syntax Description

connection-name

Specifies a connection name. Enter as a 15-byte maximum character string.

FR-interface

Specifies the Frame Relay interface type and number, for example, serial1/0.

FR-DLCI

Specifies the Frame Relay data-link connection identifier (DLCI) in the range 16 to 991.

ATM-interface

Specifies the ATM interface type and number, for example atm1/0.

ATM-VPI/VCI

Specifies the ATM virtual path identifier/virtual channel identifier (VPI/VCI). If a VPI is not specified, the default VPI is 0.

service-interworking

Specifies FRF.8 service interworking.

connection-name	Specifies a connection name. Enter as a 15-byte maximum character string.
FR-interface	Specifies the Frame Relay interface type and number, for example, serial1/0.
FR-DLCI	Specifies the Frame Relay data-link connection identifier (DLCI) in the range 16 to 991.
ATM-interface	Specifies the ATM interface type and number, for example atm1/0.
ATM-VPI/VCI	Specifies the ATM virtual path identifier/virtual channel identifier (VPI/VCI). If a VPI is not specified, the default VPI is 0.
service-interworking	Specifies FRF.8 service interworking.

Defaults

No default behavior or values.

Command Modes

Global configuration

Command History

Release Modification

12.1(2)T

This command was introduced.

Release	Modification
12.1(2)T	This command was introduced.

Usage Guidelines

Use the connect command to connect a Frame Relay DLCI to an ATM PVC.

To disconnect the FRF.8 interworking connection, use the shutdown connect subcommand.

Examples

The following example shows how to create an FRF.8 connection:

router(config)# interface serial0
router(config-if)# frame-relay interface-dlci 100 switched
router(config-if)# interface atm1/0
router(config-if)# pvc 0/32
router(config-if-atm-vc)# encapsulation aal5mux fr-atm-srv
router(config)# connect service-1 Serial0 100 ATM3/0 1/32 service-interworking
router(config-frf8)# efci-bit map-fecn

Related Commands

Command Description

clp-bit

Sets the ATM CLP field in the ATM cell header.

efci-bit

Sets the EFCI bit field in the ATM cell header.

encapsulation

Configures the AAL and encapsulation type for an ATM PVC, SVC, or VC class.

pvc

Creates an ATM PVC on a main interface or subinterface; enters interface-ATM-VC configuration mode.

Command	Description
clp-bit	Sets the ATM CLP field in the ATM cell header.
efci-bit	Sets the EFCI bit field in the ATM cell header.
encapsulation	Configures the AAL and encapsulation type for an ATM PVC, SVC, or VC class.
pvc	Creates an ATM PVC on a main interface or subinterface; enters interface-ATM-VC configuration mode.

de-bit

To set the Frame Relay discard eligible (DE) bit field in the Frame Relay cell header for FRF.8 service interworking, use the de-bit connect submode command. To disable or reset Frame Relay DE bit mapping, use the no form of this command.

de-bit {0 | 1 | map-clp}

no de-bit {0 | 1 | map-clp}

Syntax Description

0

The DE field in the Frame Relay header is always set to 0.

1

The DE field in the Frame Relay header is always set to 1.

map-clp

The DE field is set to 1 when one or more cells belonging to a frame has its cell loss priority (CLP) field set.

0	The DE field in the Frame Relay header is always set to 0.
1	The DE field in the Frame Relay header is always set to 1.
map-clp	The DE field is set to 1 when one or more cells belonging to a frame has its cell loss priority (CLP) field set.

Defaults

The default is set to map-clp.

Command Modes

FRF.8 connect submode

Command History

Release Modification

12.1(2)T

This command was introduced.

Release	Modification
12.1(2)T	This command was introduced.

Usage Guidelines

This command maps from ATM to Frame Relay.

Examples

The following example sets the DE bit field in the Frame Relay cell header to 1:

C3640(config)# connect service-1 serial1/0 16 atm3/0 1/32 service-interworking
C3640(config-frf8)# de-bit 1

Related Commands

Command Description

clp-bit

Sets the ATM CLP field in the ATM cell header.

connect (FR-ATM)

Connects a Frame Relay DLCI to an ATM PVC.

efci-bit

Sets the EFCI bit field in the ATM cell header.

Command	Description
clp-bit	Sets the ATM CLP field in the ATM cell header.
connect (FR-ATM)	Connects a Frame Relay DLCI to an ATM PVC.
efci-bit	Sets the EFCI bit field in the ATM cell header.

efci-bit

To set the explicit forward congestion indication (EFCI) bit field in the ATM cell header for FRF.8 service interworking, use the efci-bit connect submode command. To disable or reset this bit, use the no form of this command.

efci-bit {0 | map-fecn}

no efci-bit {0 | map-fecn}

Syntax Description

0

The EFCI field in the ATM cell header is set to 0.

map-fecn

The EFCI field in the ATM cell header is set to 1 when the forward explicit congestion notification (FECN) field in the Frame Relay header is set.

0	The EFCI field in the ATM cell header is set to 0.
map-fecn	The EFCI field in the ATM cell header is set to 1 when the forward explicit congestion notification (FECN) field in the Frame Relay header is set.

Defaults

The default is 0.

Command Modes

FRF.8 connect submode

Command History

Release Modification

12.1(2)T

This command was introduced.

Release	Modification
12.1(2)T	This command was introduced.

Usage Guidelines

This command maps from Frame Relay to ATM.

Examples

The following example creates a connection that connects Frame Relay DLCI 100 to ATM PVC 0/32, and sets the EFCI field in the ATM cell header to 1 when the FECN field in the Frame Relay header is set:

router(config)# interface atm1/0
router(config-if)# pvc 0/32
router(config-if)# encapsulation aal5mux fr-atm-srv
router(config)# connect serial0 100 atm1/0 0/32 service-interworking
router(config-frf8)# efci-bit map-fecn

Related Commands

Command Description

clp-bit

Sets the ATM CLP field in the ATM cell header.

connect (FR-ATM)

Connects a Frame Relay DLCI to an ATM PVC.

de-bit

Sets the Frame Relay DE bit field in the Frame Relay cell header.

service translation

Allows mapping between encapsulated ATM PDUs and encapsulated Frame Relay PDUs.

Command	Description
clp-bit	Sets the ATM CLP field in the ATM cell header.
connect (FR-ATM)	Connects a Frame Relay DLCI to an ATM PVC.
de-bit	Sets the Frame Relay DE bit field in the Frame Relay cell header.
service translation	Allows mapping between encapsulated ATM PDUs and encapsulated Frame Relay PDUs.

frame-relay interface-dlci switched (FR-ATM)

To indicate that a Frame Relay data-link connection identifier (DLCI) is switched, use the frame-relay interface-dlci switched interface configuration command. To remove this assignment, use the no form of this command.

frame-relay interface-dlci dlci switched

no frame-relay interface-dlci dlci switched

Syntax Description

dlci

Specifies the Frame Relay DLCI number.

dlci	Specifies the Frame Relay DLCI number.

Defaults

No DLCI is assigned.

Command Modes

Interface configuration

Command History

Release Modification

10.0

This command was introduced.

12.1(2)T

The switched keyword was added for the Frame Relay-to-ATM Service Interworking (FRF.8) feature.

Release	Modification
10.0	This command was introduced.
12.1(2)T	The switched keyword was added for the Frame Relay-to-ATM Service Interworking (FRF.8) feature.

Usage Guidelines

This command creates an FRF.8 Frame Relay DLCI.

Examples

The following example configures serial interface 0 as a switched Frame Relay DLCI:

router(config)# interface serial0
router(config-if)# frame-relay interface-dlci 100 switched
router(config-fr-dlci)#

Related Commands

Command Description

show frame-relay pvc

Displays statistics about Frame Relay interfaces.

show interface

Displays interface information.

Command	Description
show frame-relay pvc	Displays statistics about Frame Relay interfaces.
show interface	Displays interface information.

service translation

To enable upper layer user protocol encapsulation for Frame Relay-to-ATM Service Interworking (FRF.8) feature, which allows mapping between encapsulated ATM protocol data units (PDUs) and encapsulated Frame Relay PDUs, use the service connect submode command. To disable upper layer user protocol encapsulation, use the no form of this command.

service translation

no service translation

Syntax Description

This command has no arguments or keywords.

Defaults

The default state is service translation.

Command Modes

FRF.8 connect submode

Command History

Release Modification

12.1(2)T

This command was introduced.

Release	Modification
12.1(2)T	This command was introduced.

Usage Guidelines

The no service translation command disables mapping between encapsulated ATM PDUs and encapsulated Frame Relay PDUs.

Examples

The following example shows an FRF.8 configuration with service translation disabled:

C3640# show running:configuration

Building configuration...
 
Current configuration:
 
connect service-1 Serial1/0 16 ATM3/0 1/32 service-interworking
 no service translation
 efci-bit map-fecn

The following example shows how to configure service translation on the connection named service-1:

router(config)# connect service-1 serial1/0 16 ATM3/0 1/32 service-interworking
router(config-frf8)# service translation

Related Commands

Command Description

clp-bit

Sets the ATM CLP field in the ATM cell header.

de-bit

Sets the Frame Relay DE bit field in the Frame Relay cell header.

efci-bit

Sets the EFCI bit field in the ATM cell header.

Command	Description
clp-bit	Sets the ATM CLP field in the ATM cell header.
de-bit	Sets the Frame Relay DE bit field in the Frame Relay cell header.
efci-bit	Sets the EFCI bit field in the ATM cell header.

show connect

To display statistics and other information about Frame Relay-to-ATM Service Interworking (FRF.8) connections, use the show connect EXEC command.

show connect [all | element | ID | name | port]

Syntax Description

all

(Optional) Displays information about all Frame Relay-to-ATM Service Interworking (FRF.8) connections.

element

(Optional) Displays information about the specified connection element.

ID

(Optional) Displays information about the specified connection identifier.

name

(Optional) Displays information about the specified connection name.

port

(Optional) Displays information about all connections on an interface.

all	(Optional) Displays information about all Frame Relay-to-ATM Service Interworking (FRF.8) connections.
element	(Optional) Displays information about the specified connection element.
ID	(Optional) Displays information about the specified connection identifier.
name	(Optional) Displays information about the specified connection name.
port	(Optional) Displays information about all connections on an interface.

Defaults

Default state is show connect all.

Command Modes

EXEC

Command History

Release Modification

12.1(2)T

This command was introduced.

Release	Modification
12.1(2)T	This command was introduced.

Examples

The following example displays information about the specified FRF.8 connection identifier:

C3640# show connect id 10
 
FR/ATM Service Interworking Connection: service-1
  Status    - UP
  Segment 1 - Serial1/0 DLCI 16
  Segment 2 - ATM3/0 VPI 1 VCI 32
Interworking Parameters -
    service translation
    efci-bit 0
    de-bit map-clp
    clp-bit map-de

The following example displays information about the FRF.8 connection on an interface:

C3640# show connect port atm3/0
 
ID   Name               Segment 1            Segment 2           State
========================================================================
10   service-1         Serial1/0 16         ATM3/0 1/32          UP

Table 2 describes the fields seen in these displays.

Table2: show connect Field Descriptions

Display Description

ID

Arbitrary connection identifier assigned by the operating system.

Name

Assigned connection name.

Segment 1 or 2

Frame Relay or ATM interworking segments.

State or Status

Status of the connection, UP, DOWN, or ADMIN DOWN.

Display	Description
ID	Arbitrary connection identifier assigned by the operating system.
Name	Assigned connection name.
Segment 1 or 2	Frame Relay or ATM interworking segments.
State or Status	Status of the connection, UP, DOWN, or ADMIN DOWN.

Related Commands

Command Description

connect (FR-ATM)

Connects a Frame Relay DLCI to an ATM PVC.

show atm pvc

Displays all ATM PVCs, SVCs, and traffic information.

show frame-relay pvc

Displays statistics about Frame Relay interfaces.

Command	Description
connect (FR-ATM)	Connects a Frame Relay DLCI to an ATM PVC.
show atm pvc	Displays all ATM PVCs, SVCs, and traffic information.
show frame-relay pvc	Displays statistics about Frame Relay interfaces.

shutdown

To shut down a Frame Relay-to-ATM Service Interworking (FRF.8) connection, use the shutdown connect submode command. To disable disconnection, use the no form of this command.

shutdown

no shutdown

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

FRF.8 connect submode

Command History

Release Modification

12.1(2)T

This command was introduced.

Release	Modification
12.1(2)T	This command was introduced.

Usage Guidelines

The FRF.8 connection must be manually shut down once the interworking connection is created by use of the shutdown connect subcommand.

Examples

The following example shows how to shut down an FRF.8 connection:

C3640(config)# connect serial0 100 atm3/0 1/35 service-interworking
. . .
C3640(config-frf8)# shutdown

Related Commands

Command Description

connect (FR-ATM)

Connects a Frame Relay DLCI to an ATM PVC.

Command	Description
connect (FR-ATM)	Connects a Frame Relay DLCI to an ATM PVC.

Glossary

Asynchronous Transfer Mode---See ATM.

ATM---Asynchronous Transfer Mode. International standard for cell relay in which multiple service types (such as voice, video, or data) are conveyed in fixed-length (53-byte) cells. Fixed-length cells allow cell processing to occur in hardware, thereby reducing transit delays. ATM is designed to take advantage of high-speed transmission media such as E3, SONET, and T3.

data-link connection identifier---See DLCI.

DLCI---data-link connection identifier. Value that specifies a permanent virtual circuit or switched virtual circuit in a Frame Relay network. In the basic Frame Relay specification, DLCIs are locally significant (connected devices might use different values to specify the same connection).

Frame Relay---Industry-standard, switched data link layer protocol that handles multiple virtual circuits using High-Level Data Link Control encapsulation between connected devices.

IMA---inverse multiplexing over ATM. Standard protocol defined by the ATM Forum in 1997.

inverse multiplexing over ATM---See IMA.

OC-3---optical carrier signal level 3. One of a series of physical protocols defined for SONET optical signal transmissions.

optical carrier signal level 3---See OC-3.

permanent virtual circuit---See PVC.

PVC---permanent virtual circuit. Virtual circuit that is permanently established. PVCs save bandwidth associated with circuit establishment and tear down in situations where certain virtual circuits must exist all the time. In ATM terminology, called a permanent virtual connection.

service specific convergence sublayer---See SSCS.

SSCS---service specific convergence sublayer. One of the two sublayers of any ATM adaption layer (AAL). SSCS, which is service dependent, offers assured data transmission.

SVC---switched virtual circuit. Virtual circuit that is dynamically established on demand and is torn down when transmission is complete. SVCs are used in situations where data transmission is sporadic. In ATM terminology, called a switched virtual connection.

switched virtual circuit---See SVC.

Table of Contents

Frame Relay-to-ATMService Interworking (FRF.8)

Frame Relay-to-ATMService Interworking (FRF.8)

Frame Relay-to-ATM
Service Interworking (FRF.8)

Frame Relay-to-ATM
Service Interworking (FRF.8)