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Table of Contents

Configuring Frame Relay/ATM
Interworking Port Adapter Interfaces

Configuring Frame Relay/ATM
Interworking Port Adapter Interfaces

This chapter describes Frame Relay/ATM Interworking and the required steps to configure the channelized Frame Relay port adapters. These port adapters facilitate interworking between a Frame Relay network, an ATM network, and network users. Existing Frame Relay users can also migrate to higher bandwidth ATM using channelized Frame Relay port adapters. Additionally, these port adapters extend the ATM network across a wide area over a frame-based serial line or intervening Frame Relay WAN.

Note For a more thorough discussion on how to configure your Frame Relay specific network equipment, refer to the Cisco IOS 11.3 publications on the Documentation CD-ROM.

The following sections describe Frame Relay/ATM Interworking concepts and configuration tasks:

Note For a complete description of the commands mentioned in this chapter, refer to the LightStream 1010 ATM Switch and Catalyst 8510 MSR Command Reference publication.

Frame Relay/ATM Interworking Overview

Frame Relay/ATM Interworking allows you to retain your existing Frame Relay services and, as needs expand, migrate to the higher bandwidth capabilities provided by ATM networks. Frame Relay traffic connects across high-speed ATM trunks and uses two interworking functions, described in the following sections:

Network Interworking

The Network Interworking Function (Network IWF) facilitates the transport of Frame Relay user traffic and Frame Relay PVC signalling traffic over ATM. Tunneling, multiprotocol encapsulation and other higher layer procedures are handled just as they would be over leased lines. A Network IWF application connects two Frame Relay devices over an ATM backbone, as shown in Figure 18-1.


Figure 18-1: Frame Relay/ATM Network Interworking


If a Frame Relay port is connected across an ATM network to an ATM device, network interworking requires that the ATM device recognize that it is connected to an interworking function, such as Frame Relay. The ATM device must then exercise the appropriate service specific convergence sublayer (SSCS), in this case the Frame Relay SSCS (FR-SSCS).

Service Interworking

The Service Interworking Function (Service IWF) provides a transport between two dissimilar devices, such as Frame Relay and ATM. Unlike Network IWF, Service IWF does not transport traffic transparently. Rather, it serves as a protocol converter and allows communication between dissimilar devices, as shown in Figure 18-2.


Figure 18-2: Frame Relay/ATM Service Interworking


Frame Relay traffic is sent on a PVC through the Frame Relay network to the Service IWF, which then maps Frame Relay frames to ATM cells on an ATM PVC. The Service IWF converts Frame Relay PVC address information such as the data link control identifier (DLCI) to the ATM VPI/VCI. Additionally, the forward explicit congestion notification (FECN) bit maps to the payload type (PT) and the discard eligibility (DE) bit maps to the cell loss priority (CLP) bit of the ATM cell.

Configuring the Channelized E1 Frame Relay Port Adapter

The channelized E1 Frame Relay port adapter provides 4 physical ports. Each port supports up to 31 E1 serial interfaces, also referred to as channel groups, totalling 124 serial interfaces per port adapter. The E1 line operates at 2.048 Mbps that is equivalent to 31 time slots (DS0 channels). The E1 time slot provides usable bandwidth of n x 64 kbps, where n is the time slot from 1 to 31.

Figure 18-3 illustrates how an E1 trunk (with 4 ports) provides single or multiple time slots mapped across the ATM network. Each time slot represents a single n x 64 circuit that transmits data at a rate of 64 Kbps. Multiple n x 64 circuits can be connected to a single port, using separate time slots.


Figure 18-3: E1 Time Slot Mapping


Guidelines

If your CE1 needs to be configured, you will need the following information:

Default CE1 Interface Configuration

The following defaults are assigned to all CE1 port adapter interfaces:

Configure the CE1 Interface

To manually change any of your default configuration values, follow these steps beginning in global configuration mode:

Step Command Task
1

controller e1 card/subcard/port

Specify the controller interface port and enter controller configuration mode.

2

clock source {free-running | loop-timed | reference | network-derived}

Configure the type of clocking.

3

framing {crc4 | no-crc4}

Configure the E1 framing type.

Example

The following example shows how to change the clock source to free-running using the clock source command.

Switch(config)# controller e1 1/0/0
Switch(config-controll)# clock source free-running

Configure Channel Group on the CE1

A channel group, also referred to as a serial interface, is configured on an E1 line by associating time slots to it. The channel group can have from 1 to 31 time slots (DS0s). The transmission rate or bandwidth of the channel group is calculated by multiplying the number of time slots times 64 Kbps.

To configure the channel group, follow these steps beginning in global configuration mode:

Step Command Task
1

controller e1 card/subcard/port

Specify the controller interface port and enter controller configuration mode.

2

channel-group number timeslots range

Configure the identifier and range of E1 time slot number(s) that comprise the channel group.

Example

The following example shows how to configure time slots 1 through 5 and 20 through 23 on E1 channel group 5 using the channel-group command.

Switch(config)# controller e1 0/1/0
Switch(config-controll)# channel-group 5 timeslots 1-5, 20-23

Display the CE1 Controller Information

To display your controller configuration, use the following EXEC command:
Command Task

show controller e1 card/subcard/port [brief | tabular]

Display E1 controller configuration.

Example

The configuration for controller E1 is displayed in the following example:

Switch# show controller e1 0/0/0 tabular
E1 0/0/0 is up.
E1 0/0/0 is up.
 PAM state is Up
 4CE1 H/W Version: 3.1
  4CE1 F/W Version: 2.0
  No alarms detected.
  Framing is crc4, Line Code is HDB3, Clock Source is line.
  INTERVAL       LCV  PCV  CS  SELS LES  DM   ES  BES  SES  UAS  SS
  18:38-18:51     0    0   0    0    0    0    2    0   10  704   0

Configuring Frame Relay/ATM Interworking Functions

You must follow required steps to enable Frame Relay/ATM Interworking on your ATM switch. In addition, you can customize Frame Relay/ATM for your particular network needs and monitor Frame Relay/ATM connections. The following sections outline these tasks.

The tasks described in the following sections are required:

For information on how to customize your Frame Relay/ATM connections, see the "Configuring LMI" section and the "Configuring Frame Relay/ATM Resource Management" section in this chapter.

Enable Frame Relay Encapsulation on an Interface

To set Frame Relay encapsulation on the serial interface, perform the following tasks beginning in global configuration mode:

Step Command Task
1

interface serial card/subcard/port:cgn

Select the interface to be configured.

2

encapsulation frame-relay ietf

Configure Frame Relay encapsulation.

Frame Relay supports encapsulation of all supported protocols in conformance with RFC 1490, allowing interoperability between multiple vendors.

Note You must shut down the interface prior to Frame Relay encapsulation.
Example
Switch(config)# interface serial 0/1/0:5
Switch(config-if)# shutdown
Switch(config-if)# encapsulation frame-relay ietf
Switch(config-if)# no shutdown

Display Frame Relay Encapsulation

To display Frame Relay encapsulation, perform the following task in user EXEC mode:
Command Task

show interfaces serial card/subcard/port:cgn

Display Frame Relay encapsulation.

Example:

The following example displays the Frame Relay encapsulation configuration on serial interface 0/1/0:5

Switch# show interface serial 0/1/0:5


 
  Serial0/1/0:5 is up, line protocol is up
  Hardware is FRPAM-SERIAL
  MTU 4096 bytes, BW 320 Kbit, DLY 0 usec, rely 0/255, load 1/255


 
  Encapsulation FRAME-RELAY IETF, loopback not set, keepalive not set
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0 (size/max/drops); Total output drops: 
<information deleted>

Configure Frame Relay Serial Interface Type

To configure an interface as a data communications equipment (DCE) or Network-to-Network Interface (NNI) type, perform the following tasks beginning in global configuration mode:

Step Command Task
1

interface serial card/subcard/port:cgn

Select the interface to be configured.

2

frame-relay intf-type {DCE | NNI}

Select a Frame Relay interface type.

Example

The following example shows how to configure Frame Relay interface type NNI for serial interface 0/1/0:5:

Switch(config)# interface serial 0/1/0:5
Switch(config-if)# frame-relay intf-type nni

Display Frame Relay Interface Configuration

To show the Frame Relay interface configuration, use the following EXEC command:

Command Task

more system:running-config

Display the Frame Relay interface configuration.

Example

The Frame Relay configuration is displayed in the following example:

Switch# more system:running-config
Building configuration...
 
Current configuration:
!
version 11.3
no service pad
no service password-encryption
!
hostname Switch
!
<information deleted>
!
interface Serial0/1/0:5
 no ip address
 no ip directed-broadcast
 encapsulation frame-relay IETF
 no arp frame-relay


 
  frame-relay intf-type nni
<information deleted>

Configuring LMI

To configure the LMI, complete the tasks in the following sections:

Configure the LMI Type

The industry-accepted standards are supported for addressing the Local Management Interface (LMI), including the Cisco specification. By default, the Cisco option is active on your Frame Relay interface.

To manually set an LMI type on your Frame Relay port adapter, follow these steps beginning in global configuration mode:

Step Command Task
1

interface serial card/subcard/port:cgn

Select the interface to be configured.

2

frame-relay lmi-type [cisco | ansi | q933a]

Select Frame Relay LMI type.

3

end

Exit configuration mode.

4

copy system:running-config nvram:startup-config

Write the LMI type to NVRAM.

Configure the LMI Keepalive Interval

A keepalive interval must be set to configure the LMI. By default, this interval is 10 seconds and, per the LMI protocol, must be set as a positive intriguer that is less than the corresponding interval on the neighboring switch. To set the keepalive interval, perform the following task beginning in global configuration mode:

Step Command Task
1

interface serial card/subcard/port:cgn

Select the interface to be configured.

2

keepalive number

Select the keepalive interval.

Configure the LMI Polling and Timer Intervals

You can set various optional counters, intervals, and thresholds to fine-tune the operation of your LMI on your Frame Relay devices. Set these attributes by performing one or more of the following tasks beginning in global configuration mode:

Step Command Task
1

interface serial card/subcard/port:cgn

Select the interface to be configured.

2

frame-relay lmi-n391dte keep-exchanges

Configure an NNI full status polling interval.

3

frame-relay lmi-n392dce threshold

Configure the DCE and the NNI error threshold.

4

frame-relay lmi-n392dte threshold

Configure the NNI error threshold.

5

frame-relay lmi-n393dce events

Configure the DCE and NNI monitored events count.

6

frame-relay lmi-n393dte events

Configure the monitored event count on an NNI interface.

7

frame-relay lmi-t392dce seconds

Configure the polling verification timer on a DCE or NNI interface.

Example

The following example shows how to change the default polling verification timer on a Frame Relay interface to 20 seconds using the frame-relay lmi-t392dce command. 

Switch(config)# interface serial 0/1/0:5
Switch(config-if)# frame-relay lmi-t392dce 20

Display Frame Relay Serial Interface

To display information about a serial interface, perform the following task in user EXEC mode:
Command Task

show interface serial card/subcard/port:cgn

Display Frame Relay serial interface configuration.

Example

The following example displays serial interface configuration information for an interface with Cisco LMI enabled:

Switch> show interface serial 0/1/0:5
Serial 0/1/0:5 is up, line protocol is up
	Hardware is FRPAM-SERIAL
	MTU 4096 bytes, BW 1536 Kbit, DLY 0 usec, rely 229/255, load 14/255
	Encapsulation FRAME-RELAY IETF, loopback not set, keepalive set (10 sec)
	LMI enq sent 0, LMI stat recvd 0, LMI upd recvd 0
	

 
  

 
  LMI DLCI 1023 LMI type is CISCO frame relay DCE
<information deleted>

Display LMI Statistics

To display statistics about the LMI, perform the following task in user EXEC mode:
Command Task

show frame-relay lmi interface serial card/subcard/port:cgn

Display LMI statistics.

Example

The following example displays the LMI statistics of a Frame Relay port adapter with an NNI interface:

Switch> show frame-relay lmi interface serial 0/1/0:5
LMI Statistics for interface serial 0/1/0:5 (Frame Relay NNI) LMI Type = Cisco
Invalid Unnumberred 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. Rcvd 11	Num Status msgs Sent 11
Num Update Status Rcvd 0	Num St Enq Timeouts 0
Num Status Enq. Sent 10	Num Status msgs Rcvd 10
Num Update Status Sent 0	Num Status Timeouts 0

Configuring Frame Relay/ATM Resource Management

This section describes the following resource management tasks specifically for your Frame Relay/ATM Interworking network needs:

For information about how to configure your ATM Connection Traffic Table rows, see the "Configure the Connection Traffic Table" section in the "Configuring Resource Management" chapter.

Configure Frame Relay/ATM Connection Traffic Table Rows

A row in the Frame Relay/ATM Connection Traffic Table (CTT) must be created for each unique combination of Frame Relay traffic parameters. All Frame Relay/ATM Interworking virtual connections then provide traffic parameters for each row in the table per flow (receive and transmit). Multiple virtual connections can refer to the same traffic table row.

The Frame Relay traffic parameters (specified in the command used to create the row) are converted into equivalent ATM traffic parameters. Both parameters are stored internally and used for interworking virtual connections.

The formula used for Frame Relay/ATM traffic conversions are specified in the B-ICI specification, V2.0. Use a frame size (n) of 250 bytes and a header size of 2 bytes.


Table 18-1: Frame Relay/ATM Traffic Conversion

Peak Cell Rate (0+1) (Cells Per Second) =

Peak Information Rate1/8 * (6/260)

Sustainable Cell Rate (0) (Cells Per Second) =

Committed Information Rate2/8 * (6/250)

Maximum Burst Size (0) (cells)

(Committed Burst Size3/8 * (1/(1-Committed
Information Rate/Peak Information Rate)) + 1) * (6/250)

1In bits per second.
2In bits per second.
3In bits.

PVC Connection Traffic Rows

PVC connection traffic rows, or stable rows, are used to specify traffic parameters for PVCs.

Note PVC connection traffic rows cannot be deleted while in use by a connection.

SVC Connection Traffic Rows

SVC connection traffic rows, or transient rows, are used by the signalling software to obtain traffic parameters for soft SVCs.

Note SVC connection traffic rows cannot be deleted from the CLI or SNMP. They are automatically deleted when the connection is removed.

To make the CTT management software more efficient, the CTT row-index space is split into space allocated by the CLI/SNMP and Signalling. See Table 18-2.


Table 18-2: CTT Row-Index Allocation
Allocated By Row-Index Range

CLI/SNMP

1 through 1,073,741,823

Signalling

1,073,741,824 through 2,147,483,647

Predefined Rows

Table 18-3 describes the pre-defined row:


Table 18-3: Default Frame Relay/ATM Connection Traffic Table Row
CTT Row-Index CIR (bits/s) Bc (bits) Be (bits) PIR (bits/s) Service
Category 		ATM Row-Index

100

64000

32768

32768

64000

vbr-nrt

100

Configure the Frame Relay/ATM Connection Traffic Table

To create a Frame Relay/ATM CTT row, perform the following task in global configuration mode:
Command Task

frame-relay connection-traffic-table-row [index row-index] cir_value bc_value pir_value be_value {abr | vbr-nrt | ubr} [atm_row-index]

Configure a Frame Relay/ATM CTT row.

If you do not specify an index row number, the system software determines if one is free. The index row number is then displayed in the allocated index field if the command is successful.

If the atm row index is not specified, system software tries to use the same row index used by Frame Relay. If not possible, a free ATM row index is used.

Example

The following example shows how to configure a Frame Relay/ATM CTT row with non-real-time variable bit rate (NRT-VBR) service category, committed information rate of 64000 bits per second, a peak information rate of 1536000 bits per second, and a committed burst size of 8192 bits per second:

Switch(config)# frame-relay connection-traffic-table-row 64000 8192 1536000 vbr-nrt
Allocated index = 64000
Switch(config)#

Display the Frame Relay/ATM Connection Traffic Table

To display the Frame Relay/ATM CTT configuration, use the following EXEC command:
Command Task

show frame relay connection-traffic-table [from-row | row row]

Display the Frame Relay/ATM CTT configuration.

Example

The following example shows how to display the Frame Relay/ATM CTT configuration table:

Switch> show frame relay connection-traffic-table
Row      cir       bc        be       pir      FR-ATM    Service Category  ATM row
100      64000   32768     32768     64000                   vbr-nrt        100

Configure the Interface Resource Management Tasks

The following resource management tasks configure queue thresholds, committed burst size, and service overflow on Frame Relay interfaces. To change any of these interface parameters, perform the following tasks in interface configuration mode:
Step Command Task
1

frame-relay input-queue {abr | ubr | vbr-nrt} {discard-threshold | marking- threshold} threshold

Configure discard and marking thresholds for the inbound direction.

2

frame-relay output-queue {abr | ubr | vbr-nrt} {discard-threshold | marking- threshold} threshold

Configure discard and marking thresholds for the outbound direction.

3

frame-relay bc-default bc-value

Configure the committed burst size (in bits) used for ABR/UBR soft VCs on the destination interface.

4

frame-relay accept-overflow

Configure to accept or discard overflow traffic (exceeding CIR) for VBR circuits.

Note Steps 1, 2, and 4 affect existing and future connections on the Frame Relay interface, but Step 3 affects only future connections.

Display Frame Relay Interface Resources

To display your Frame Relay interface resource configuration, use the following EXEC command:
Command Task

show frame-relay interface resource serial card/subcard/port:cgn

Display resource allocation on a Frame Relay interface.

Example

The resource information for Frame Relay serial interface 0/1/0:5 is displayed in the following example:

Switch# show frame-relay interface resource serial 0/1/0:5
Encapsulation: FRAME-RELAY
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
	Resource Management state:
          Available bit rates (in bps):
             320000 vbr-nrt RX, 320000 vbr-nrt TX
             320000 abr RX,     320000 abr TX
             320000 ubr RX,     320000 ubr TX
          Allocated bit rates (in bps):
             0 vbr-nrt RX, 0 vbr-nrt TX
             0 abr RX,     0 abr TX
             0 ubr RX,     0 ubr TX

Configuring Frame Relay/ATM Virtual Connections

This section describes how to configure virtual connections (VCs) for Frame Relay/ATM Interworking and Frame Relay to Frame Relay switching.

The tasks to configure virtual connections are described in the following sections:

General Guidelines

The following steps must be performed in a prescribed order before you configure a Frame Relay/ATM Interworking PVC, soft PVC, or a Frame Relay to Frame Relay PVC.

Step 1 Configure the controller on the Frame Relay port adapter

Step 2 Configure the T1 channel and channel group on the Frame Relay port adapter

Step 3 Configure Frame Relay encapsulation and Frame Relay LMI on the serial port corresponding to the channel group configured in Step 2

Step 4 Configure Frame Relay resource management tasks including Frame Relay connection traffic table rows

Step 5 Configure Frame Relay/ATM Interworking VC tasks

Characteristics and Types of Virtual Connections

The characteristics of the Frame Relay/ATM Interworking VC, established when the VC is created, include the following:

These switching features can be turned off with the interface configuration commands.

Note For information about ATM VCCs, refer to the "Configuring Virtual Connections" chapter in this publication.

Table 18-4 lists the types of supported virtual connections.


Table 18-4: Supported Frame Relay/ATM Virtual Connection Types
Connection Point-to-Point Point-to-Multipoint Transit Terminate

Permanent virtual channel (PVC)

3

--

3

3

Soft permanent virtual channel (Soft PVC)

3

--

3

--

Configure Frame Relay/ATM Network Interworking PVCs

This section describes configuring Frame Relay/ATM Network Interworking PVCs. This type of connection establishes a bidirectional facility that transfers Frame Relay traffic between two Frame Relay users via an ATM network.

Figure 18-4 shows an example of a Frame Relay/ATM Network Interworking PVC between Frame Relay User A and ATM User D through an ATM network.


Figure 18-4: Network Interworking PVC Example


To configure a Frame Relay/ATM Network Interworking PVC, perform these steps beginning in global configuration mode:
Step Command Task
1

interface serial card/subcard/port:cgn1

Select the interface to be configured.

2

frame-relay pvc dlci2 [upc upc] [rx-cttr index] [tx-cttr index] network [clp-bit {0 | 1 | map-de}] [de-bit {map-de | map-clp-or-de}] [interface atm card/subcard/port [vpi] [vci] [upc upc] [pd pd] [rx-cttr index] [tx-cttr index]

Configure a Frame Relay/ATM Network Interworking PVC.

1The serial interface is created with the channel-group command and configured using the encapsulation frame-relay ietf command. cgn is the channel group number of a channel group configured using the channel-group command.
2The dlci value appears in the Conn-Id and X-Conn-Id columns of the show vc command.

Note The row index for rx-cttr and tx-cttr must be configured before using this optional parameter. See the section "Configuring Frame Relay/ATM Resource Management" in this chapter.
Note When configuring PVC connections, configure the lowest VPI and VCI numbers first.
Examples

The following example shows how to configure the internal cross-connect Frame Relay/ATM Network Interworking PVC on Switch B between serial interface 0/1/0:5, DLCI = 43 and atm 3/0/2, VPI = 2, VCI = 100 (see Figure 18-4):

Switch-B(config)# interface serial 0/1/0:5
Switch-B(config-if)# frame-relay pvc 43 network interface atm 3/0/2 2 100

The following example shows how to configure the internal cross-connect PVC on Switch C between atm 4/1/0, VPI = 2, VCI = 100 and serial interface 0/0/1:9, DLCI = 255:

Switch-C(config)# interface serial 0/0/1:9
Switch-C(config-if)# frame-relay pvc 255 network interface atm 4/1/0 2 100
Note The Frame Relay/ATM Network Interworking PVC must be configured from the serial interface and cross-connected to the ATM interface.

Display Frame Relay/ATM Network Interworking PVCs

To show the network interworking configuration, use the following EXEC command:
Command Task

show interface [serial card/subcard/port:cgn]

Show the serial interface configuration.

show vc [interface {atm card/subcard/port [vpi vci] | serial card/subcard/port:cgn dlci}]

Show the PVC interface configuration.

Examples

The following example displays the status of serial interface 0/1/0:5 on Switch B:

Switch-B# show interface serial 0/1/0:5
Serial0/1/0:5 is up, line protocol is up 
  Hardware is FRPAM-SERIAL
  MTU 4096 bytes, BW 1536 Kbit, DLY 0 usec, rely 23/255, load 1/255
  Encapsulation FRAME-RELAY, loopback not set, keepalive set (10 sec)
  LMI enq sent  0, LMI stat recvd 0, LMI upd recvd 0
  LMI enq recvd 5, LMI stat sent  5, LMI upd sent  0, DCE LMI up
  LMI DLCI 1023  LMI type is CISCO  frame relay DCE
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0 (size/max/drops); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
     Conversations  0/1/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
  5 minute input rate 40000 bits/sec, 124 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     44191 packets input, 1762094 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     44182 input errors, 7339 CRC, 0 frame, 0 overrun, 0 ignored, 40 abort
     10 packets output, 797 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     11 carrier transitions
   Timeslots(s) Used: 1-24 on T1 5 
   Frames Received with:
    DE set: 0, FECN set :0, BECN set: 0
   Frames Tagged :
    DE: 0, FECN: 4294967290 BECN: 0
   Frames Discarded Due to Alignment Error: 0
   Frames Discarded Due to Illegal Length: 0
   Frames Received with unknown DLCI: 0
   Frames with illegal Header : 0 
   Transmit Frames with FECN set :0,  BECN Set :0 
   Transmit Frames Tagged FECN : 0 BECN : 0 
   Transmit Frames Discarded due to No buffers : 0
   Default Upc Action : tag-drop
   Default Bc (in Bits) : 32768

The following example displays the Switch B PVC configuration for serial interface 0/1/0:5:

Switch-B# show vc interface serial 0/1/0:5
Interface      Conn-Id    Type   X-Interface     X-Conn-Id   Encap  Status
Serial0/1/0:5     43      PVC     ATM3/0/2          2/100             UP

The following example displays the Switch B PVC configuration for serial interface 0/1/0:5,
DLCI = 43:

Switch-B# show vc interface serial 0/1/0:5 43
Interface: Serial0/1/0:5, Type: FRPAM-SERIAL 
DLCI = 43     Status : ACTIVE
Connection-type: PVC 
Cast-type: point-to-point
Usage-Parameter-Control (UPC): tag-drop
pvc-create-time : 00:00:10      Time-since-last-status-change : 00:00:03 
Interworking Function Type : network
de-bit Mapping : map-clp-or-de       clp-bit Mapping : map-de      
ATM-P Interface: ATM-P0/1/0, Type: ATM-PSEUDO 
ATM-P VPI = 82  ATM-P VCI = 11
ATM-P Connection Status: UP
Cross-connect-interface: ATM0/0/0, Type: oc3suni 
Cross-connect-VPI = 2 
Cross-connect-VCI = 100
Cross-connect-UPC: pass
Cross-connect OAM-configuration: disabled
Cross-connect OAM-state:  Not-applicable
tx Frames : 0   Rx Frames : 0
tx Bytes : 0    Rx Bytes : 0
tx Frames Discarded : 0         Rx Frames Discarded : 0
tx Bytes Discarded  : 0         Rx Bytes Discarded  : 0
Rx connection-traffic-table-index: 100
Rx service-category: VBR-NRT (Non-Realtime Variable Bit Rate)
Rx pir: 64000
Rx cir: 64000
Rx Bc : 32768
Rx Be : 32768
Tx connection-traffic-table-index: 100
Tx service-category: VBR-NRT (Non-Realtime Variable Bit Rate)
Tx pir: 64000
Tx cir: 64000
Tx Bc : 32768
Tx Be : 32768

Configure Frame Relay/ATM Service Interworking PVCs

This section describes configuring Frame Relay/ATM Service Interworking PVCs. A Frame Relay/ATM Service Interworking PVC is established as a bidirectional facility to transfer Frame Relay to ATM traffic between a Frame Relay user and an ATM user. The upper user protocol encapsulation (FRF.3, RFC 1483, RFC 1490, RFC 1577) mapping can be enabled with the translation option of the frame-relay pvc command.

Figure 18-5 shows an example of a Frame Relay/ATM Service Interworking PVC between Frame Relay User A and ATM User D through an ATM network.


Figure 18-5: Service Interworking PVC Example


Note VPI and VCI values can change when traffic is relayed through the ATM network.

To configure a Frame Relay/ATM Service Interworking PVC, follow these steps beginning in global configuration mode:
Step Command Task
1

interface serial card/subcard/port:cgn

Select the interface to be configured.

2

frame-relay pvc dlci [upc upc] [rx-cttr index] [tx-cttr index] service {transparent | translation} [clp_bit {0 | 1 | map-de}] [de_bit {0 | 1 | map-clp}] [efci-bit {0 | map-fecn}] [interface atm card/subcard/port vpi vci | any vci1] [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] [encap aal-encap] [inarp minutes]

Configure a Frame Relay/ATM Service Interworking PVC.

1The any-vci option is only available on interface atm0. See note below.

Note With this release of the software, addressing the interface on the processor (CPU) has changed. The ATM interface is now called atm0, and the Ethernet interface is now called ethernet0. Old formats (atm 2/0/0 and ethernet 2/0/0) are still supported.
Note The row index for rx-cttr and tx-cttr must be configured before using this optional parameter. See the section "Configuring Frame Relay/ATM Resource Management" in this chapter.
Examples

The following example shows how to configure the internal cross-connect PVC on Switch B between serial interface 0/1/0:5, DLCI = 43 and interface atm 3/0/2, VPI = 2, VCI = 100 (with the translation option) :

Switch-B(config)# interface serial 0/1/0:5
Switch-B(config-if)# frame-relay pvc 43 service translation interface atm 3/0/2 2 100

The following example shows how to configure the internal cross-connect PVC on Switch C between interface 4/1/0, VPI = 2, VCI = 100 and interface 0/0/1, VPI 50, VCI = 255:

Switch-C(config)# interface atm 4/1/0
Switch-C(config-if)# atm pvc 2 100 interface atm 0/0/1 50 255

Each subsequent VC cross-connection and link must be configured until the VC is terminated to create the entire PVC.

Note The Frame Relay/ATM Service Interworking PVC must be configured from the serial interface and then cross-connected to the ATM interface.

Display Frame Relay/ATM Service Interworking PVCs

To show the service interworking PVC configuration, use the following EXEC commands:
Command Task

show interface [serial card/subcard/port:cgn]

Show the serial interface configuration.

show vc [interface {atm card/subcard/port [vpi vci] | serial card/subcard/port:cgn dlci}]

Show the PVC interface configuration.

Configure Terminating Frame Relay/ATM Service Interworking PVCs

This section describes configuring terminating Frame Relay/ATM Service Interworking PVCs. This type of terminating connection provides the connection from IP over Frame Relay to the ATM switch used for IP over ATM and network management.

Figure 18-6 shows an example of transmit and terminating connections.


Figure 18-6: Frame Relay/ATM Transmit and Terminating Connections


Terminating connections are configured using the frame-relay pvc command; however all switch terminating connections use atm0 to connect to the ATM switch processor.

To configure terminating Frame Relay/ATM Service Interworking PVC connections, follow these steps beginning in global configuration mode:
Step Command Task
1

interface serial card/subcard/port:cgn

Select the interface to be configured.

2

frame-relay pvc dlci [upc upc] [rx-cttr index] [tx-cttr index] service {transparent | translation} [clp_bit {0 | 1 | map-de}] [de_bit {0 | 1 | map-clp}] [efci-bit {0 | map-fecn}] [interface atm card/subcard/port vpi vci | any vci1]] [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] [encap aal-encap] [inarp minutes]

Configure a Frame Relay/ATM Service Interworking PVC.

1The any-vci option is only available on interface atm0.

The following example shows how to configure the internal cross-connect PVC on Switch B between serial interface 0/1/0:5, DLCI = 50 and the terminating connection on atm0, VPI = 0 and an unspecified VCI:

Switch-B(config)# interface serial 0/1/0:5
Switch-B(config-if)# frame-relay pvc 50 service translation interface atm0 0 any-vci encap aal5snap
Note The Frame Relay/ATM Service Interworking PVC must be configured from the serial interface and then cross-connected to the ATM interface.

Display Terminating Frame Relay/ATM Service Interworking PVCs

To show the service interworking PVC configuration, use the following EXEC commands:
Command Task

show interface [serial card/subcard/port:cgn]

Show the serial interface configuration.

show vc [interface {atm card/subcard/port [vpi vci] | serial card/subcard/port:cgn dlci}]

Show the PVC interface configuration.

Note See the section "Display Frame Relay/ATM Network Interworking PVCs" for examples of the show vc command.

Configure Frame Relay Transit PVCs

This section describes configuring internal cross-connect Frame Relay to Frame Relay transit PVCs. This type of PVC is used to establish a bidirectional facility to transfer Frame Relay traffic between two Frame Relay users. Figure 18-7 shows a Frame Relay transit PVC between Frame Relay Users A and D.


Figure 18-7: Transit PVC Example


To configure a Frame Relay transit PVC, follow these steps beginning in global configuration mode:
Step Command Task
1

interface serial card/subcard/port:cgn

Select the interface to be configured.

2

frame-relay pvc dlci [upc upc] [rx-cttr index] [tx-cttr index] interface serial card/subcard/port:cgn dlci dlci [upc upc] [rx-cttr index] [tx-cttr index]

Configure a Frame Relay to Frame Relay transit PVC.

Examples

The following example shows how to configure the internal cross-connect Frame Relay PVC on Switch B between serial interface 0/1/0:5, DLCI = 43 and serial interface 3/0/2:6, DLCI = 100:

Switch-B(config)# interface serial 0/1/0:5
Switch-B(config-if)# frame-relay pvc 43 interface serial 3/0/2:6 100

The following example shows how to configure the internal cross-connect Frame Relay on Switch C between serial interface 4/1/0:2, DLCI = 100 and serial interface 0/0/1:12, DLCI = 255:

Switch-C(config)# interface serial 4/1/0:2
Switch-C(config-if)# frame-relay pvc 100 interface serial 0/0/1:12 255

Each subsequent VC cross-connection and link must be configured until the VC is terminated to create the entire VCC.

To display Frame Relay transit PVCs, use the show interface and show vc commands.

Configure Frame Relay/ATM Soft PVC Connections

This section describes configuring Frame Relay/ATM soft PVC connections which provide connections to another host or switch that does not support signalling.

You can configure the following soft PVC connections:

Guidelines for Creating Frame Relay/ATM Interworking Soft PVCs

These guidelines are appropriate for both Network and Service Interworking soft PVC connections.

Note Frame Relay interworking soft PVCs can only be configured from a Frame Relay interface.

Perform the following steps and refer to Figure 18-8:

Step 1 Determine which two switches you want to define as participants in the soft PVC.

Step 2 Determine the source (active) side of the soft PVC.

Step 3 Determine an available DLCI for value dlci_a on the source end of the soft PVC.

Step 4 Determine the destination (passive) side of the soft PVC.

Step 5 Determine the atm address of the destination side of the soft PVC. Use the show atm address command on the destination switch.

Step 6 If the destination side of the soft PVC is a Frame Relay interface, choose an available DLCI value. Use the show vc interface serial command.

If the destination side of the soft PVC is an ATM interface, choose an available VPI/VCI value.

Step 7 Choose the interworking function type, and the relevant interworking parameters (for example, de-bit/clp-bit mapping options).

Step 8 Configure the Frame Relay interworking soft PVC on the source side. See the following sections for configuration steps and examples.

Configure Frame Relay/ATM Network Interworking Soft PVCs

This section describes configuring a Frame Relay/ATM Network Interworking soft PVC terminating on two types of interfaces: Frame Relay serial interface and an ATM interface. Figure 18-8 shows a Frame Relay/ATM Network Interworking soft PVC between Switch A and Switch B.


Figure 18-8: Network Interworking Soft PVC Example


To configure a Frame Relay/ATM Network interworking soft PVC, perform these steps beginning in EXEC mode:
Step Command Task
1

show interface

Determine source and destination interfaces.

2

show vc interface serial card/subcard/port:cgn [dlci]

Determine the DLCI available for Step 3.

3

show vc interface serial card/subcard/port:cgn [dlci]

OR

show vc interface atm card/subcard/port [vpi vci]

Determine the DLCI available for Step 7.


OR

Determine the VPI/VCI for Step 7.

4

show atm address

Determine soft PVC destination address.

5

configure [terminal]

At the privileged EXEC prompt, enter configuration mode from the terminal.

6

interface serial card/subcard/port:cgn

Select the source Frame Relay port and channel group number.

7

frame-relay soft-vc dlci-a dest-adress address dlci dlci_b [upc upc] [rx-cttr index] [tx-cttr index] [retry-interval [first first-retry-interval] [maximum max-retry-interval]] [network [clp_bit {0 | 1 | map-de}] de_bit {0 | 1 | map-de | map-clp-or-de}]]

OR

frame-relay soft-vc dlci-a dest-adress address vc vpi vci [upc upc] [rx-cttr index] [tx-cttr index] [retry-interval [first first-retry-interval] [maximum max-retry-interval]] [network [clp_bit {0 | 1 | map-de}] de_bit {0 | 1 | map-de | map-clp-or-de}]]

Configure a network interworking soft PVC terminating on a Frame Relay serial interface.







Configure a network interworking soft PVC terminating on an ATM interface.

The previous configuration steps are illustrated in the following section.

Note The row index for rx-cttr and tx-cttr must be configured before using this optional parameter. See the section "Configuring Frame Relay/ATM Resource Management" in this chapter.

Frame Relay/ATM Network Interworking Soft PVC Configuration Example

Step 1 In Figure 18-8, a network interworking soft PVC is configured between Switch A and Switch B.

Step 2 The source (active) side is serial interface 0/1/0:5 on Switch A.

Step 3 DLCI 43 is available on serial interface 0/1/0:5 Switch A:

        Switch-A# show vc interface serial 0/1/0:5
Interface      Conn-Id Type    X-Interface    X-Conn-Id  Encap  Status
Serial0/1/0:5     54  SoftVC   Serial3/0/0:3    54       SoftVC  UP
Serial0/1/0:5     55  SoftVC   Serial3/0/0:2    55       SoftVC  UP
Serial0/1/0:5     56  SoftVC   ATM0/1/3        0/45      SVC     UP
Serial0/1/0:5     66  SoftVC   ATM1/1/0        0/100     SoftVC  UP

Step 4 The destination (passive) side is a Frame Relay serial interface 0/0/1:9 on Switch B.

Step 5 The atm address for the destination serial interface 0/0/1:9 on Switch B is 47.0091.8100.0000.00e0.1e79.8803.4000.0c81.8010.00.

        Switch-B# show atm address
Switch Address(es):
47.00918100000000E01E798803.00E01E808601.00 active
 
Soft VC Address(es) :
47.0091.8100.0000.00e0.1e79.8803.4000.0c80.0000.00 ATM1/0/0
47.0091.8100.0000.00e0.1e79.8803.4000.0c80.0010.00 ATM1/0/1
47.0091.8100.0000.00e0.1e79.8803.4000.0c80.0020.00 ATM1/0/2
47.0091.8100.0000.00e0.1e79.8803.4000.0c80.0030.00 ATM1/0/3
<information deleted>
 
Soft VC Address(es) for Frame Relay Interfaces :


         
          47.0091.8100.0000.00e0.1e79.8803.4000.0c81.8010.00 Serial0/0/1:9
47.0091.8100.0000.00e0.1e79.8803.4000.0c81.8020.00 Serial0/0/1:10
 
ILMI Switch Prefix(es):
47.0091.8100.0000.00e0.1e79.8803
 
ILMI Configured Interface Prefix(es):
 
LECS Address(es):

Step 6 DLCI 255 is available on serial interface 0/0/1:9 Switch B:

        Switch-B# show vc interface serial 0/0/1:9
Interface Conn-Id Type X-Interface X-Conn-Id Encap Status
Serial0/0/1:9 44 SoftVC Serial3/0/0:3 54 SoftVC UP
Serial0/0/1:9 45 SoftVC Serial3/0/0:2 55 SoftVC UP
Serial0/0/1:9 76 SoftVC ATM0/1/3 0/45 SVC UP
Serial0/0/1:9 86 SoftVC ATM1/1/0 0/100 SoftVC UP

Step 7 Configure the network interworking soft PVC from Switch A beginning in global configuration mode:

        Switch-A(config)# interface serial0/1/0:5
Switch-A(config-if)# frame-relay soft-vc 43 dest-address
47.0091.8100.0000.00e0.1e79.8803.4000.0c81.8010.00 dlci 255
Note If the soft PVC originates and terminates on a frame relay interface, the default interworking type is network interworking. You do not need to specify the interworking type explicitly.

Configure Frame Relay/ATM Service Interworking Soft PVCs

This section describes configuring a Frame Relay/ATM Service Interworking soft PVC terminating on an ATM interface. Figure 18-9 shows a Frame Relay/ATM Service Interworking soft PVC between Switch A and Switch B.


Figure 18-9: Service Interworking Soft PVC Example


To configure a Frame Relay/ATM Service Interworking soft PVC, perform these steps beginning in EXEC mode:
Step Command Task
1

show interface

Determine source and destination interfaces.

2

show vc interface serial card/subcard/port:cgn [dlci]

Determine the DLCI available for Step 3.

3

show vc interface serial card/subcard/port:cgn [dlci]

OR

show vc interface atm card/subcard/port [vpi vci]

Determine the DLCI available for Step 7.


OR

Determine the VPI/VCI for Step 7.

4

show atm address

Determine the soft PVC destination address.

5

configure [terminal]

At the privileged EXEC prompt, enter configuration mode from the terminal.

6

interface serial card/subcard/port:cgn

Select the Frame Relay serial port and channel group number.

7

frame-relay soft-vc dlci_a dest-address address vc vpi vci [upc upc] [rx-cttr index] [tx-cttr index] [retry-interval [first first-retry-interval] [maximum max-retry-interval]] [service [transparent | translation]] [clp_bit {0 | 1 | map-de}] [de_bit {0 | 1 | map-clp}] [efci-bit {0 | map-fecn}]

Configure a service interworking soft PVC.

Note The row index for rx-cttr and tx-cttr must be configured before using this optional parameter. See the section "Configuring Frame Relay/ATM Resource Management" in this chapter.
Note If the interworking soft PVC terminates on an ATM interface, the default interworking type is service interworking in translation mode.

Frame/Relay Service Soft PVC Configuration Example

Step 1 In Figure 18-9, a service interworking soft PVC is configured between Switch A and Switch B.

Step 2 The source (active) side is serial interface 0/1/0:5 on Switch A.

Step 3 DLCI 43 is available for use on serial interface 0/1/0:5 Switch A:

        Switch-A# show vc interface serial 0/1/0:5
Interface      Conn-Id Type    X-Interface    X-Conn-Id  Encap  Status
Serial0/1/0:5     54  SoftVC   Serial3/0/0:3    54       SoftVC  UP
Serial0/1/0:5     55  SoftVC   Serial3/0/0:2    55       SoftVC  UP
Serial0/1/0:5     56  SoftVC   ATM0/1/3        0/45      SVC     UP
Serial0/1/0:5     66  SoftVC   ATM1/1/0        0/100     SoftVC  UP

Step 4 The destination (passive) side is atm interface 0/0/1 on Switch B.

Step 5 The destination address for atm interface 0/0/1 is 47.0091.8100.0000.00e0.1e19.9904.4000.0c80.0010.00.

        Switch-B# show atm address
Switch Address(es):
47.00918100000000E01E199904.00E01E808601.00 active
Soft VC Address(es) :
47.0091.8100.0000.00e0.1e19.9904.4000.0c80.0000.00 ATM0/0/0


         
          47.0091.8100.0000.00e0.1e19.9904.4000.0c80.0010.00 ATM0/0/1
47.0091.8100.0000.00e0.1e19.9904.4000.0c80.0020.00 ATM0/0/2
47.0091.8100.0000.00e0.1e19.9904.4000.0c80.0030.00 ATM0/0/3
<information deleted>
 
ILMI Switch Prefix(es):
47.0091.8100.0000.00e0.1e19.9904
 
ILMI Configured Interface Prefix(es):
 
LECS Address(es):

Step 6 VPI/VCI 50/255 is available for use on atm interface 0/0/1 Switch B:

        Switch-B# show vc interface atm 0/0/1
Interface    Conn-Id    Type   X-Interface     X-Conn-Id   Encap  Status
ATM0/0/1      0/5       PVC     ATM2/0/0          0/58     QSAAL    UP
ATM0/0/1      0/16      PVC     ATM2/0/0          0/44     ILMI     UP
ATM0/0/1      0/18      PVC     ATM2/0/0          0/71     PNNI     UP

Step 7 Configure the service interworking soft PVC from Switch A:

Switch-A(config)# interface serial0/1/0:5
Switch-A(config-if)# frame-relay soft-vc 43 dest-address
47.0091.8100.0000.00e0.1e19.9904.4000.0c80.0010.00 vc 50 255


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Posted: Fri Apr 9 10:09:32 PDT 1999
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