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atm txbuff
atm uni-version
atm vc-per-vp
atm vp-filter
broadcast
ces aal1 clock
ces aal1 service
ces circuit
ces dsx1 clock source
ces dsx1 framing
ces dsx1 lbo
ces dsx1 linecode
ces dsx1 loopback
ces dsx1 signalmode robbedbit
ces pvc
class
dxi map
dxi pvc
encapsulation
encapsulation atm-dxi
idle-timeout
ilmi manage
inarp
interface atm
interface cbr
loopback
mid
network-clock-select

atm txbuff

To set the maximum number of transmit buffers for simultaneous packet fragmentation, use the atm  txbuff interface configuration command. The no form of this command restores the default value.

atm txbuff number
no atm txbuff

Syntax Description

number

Maximum number of packet fragmentations that the AIP can perform simultaneously, in the range 0 through 512. Default is 256.

Default

256 packet fragmentations

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command is supported on AIP for Cisco  7500 series routers. This command is not supported on the ATM port adapter for Cisco 7200 and 7500 series routers, nor is it supported on Cisco  4500 and Cisco  4700 routers.

Example

The following example configures the AIP to perform up to 300 packet fragmentations simultaneously:

atm txbuff 300

atm uni-version

To specify the User-Network Interface (UNI) version (3.0 or 3.1) the router should use when ILMI link autodetermination is unsuccessful or ILMI is disabled, use the atm uni-version interface configuration command. To restore the default value to 3.0, use the no form of this command.

atm uni-version version-number
no atm uni-version version-number

Syntax Description

version-number

UNI version selected on an interface. Valid values are 3.0 and  3.1.

Default

Version 3.0

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2.

Normally, when the ILMI link autodetermination is enabled on the interface and is successful, the router accepts the UNI version returned by ILMI. If the ILMI link autodetermination is unsuccessful or ILMI is disabled, the UNI version defaults to 3.0. You can override the default UNI version by using this command to enable UNI 3.1 signaling support. The no form of the command sets the UNI version to one returned by ILMI if ILMI is enabled and the link autodetermination process is successful. Otherwise, the UNI version reverts to 3.0.

Example

The following example specifies UNI version 3.1 signaling port on the ATM interface 2/0:

interface atm 2/0
  atm uni-version 3.1

atm vc-per-vp

To set the maximum number of VCIs to support per VPI, use the atm vc-per-vp interface configuration command. The no form of this command restores the default value.

atm vc-per-vp number
no atm vc-per-vp

Syntax Description

number

Maximum number of VCIs to support per VPI. On the AIP for Cisco  7500 series routers, valid values are: 16, 32, 64, 128, 256, 512, or 1024.

On the ATM port adapter for Cisco 7200 series and Cisco 7500 series routers, valid values are: 16, 32, 64, 128, 256, 512, 1024, or 2048.

On the NPM for Cisco  4500 and Cisco  4700 routers, valid values are: 32, 64, 128, 256, 512, 1024, 2048, 4096, or 8192. Default is  1024.

Default

1024

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command controls the memory allocation in the AIP, ATM port adapter, or NPM to deal with the VCI table. It defines the maximum number of VCIs to support per VPI; it does not bound the VCI numbers.

An invalid VCI causes a warning message to be displayed.

Example

The following example sets the maximum number of VCIs per VPI to 512:

atm vc-per-vp 512

Related Commands

You can use the master indexes or search online to find documentation of related commands.

pvc

atm vp-filter

To set the AIP filter register, use the atm vp-filter interface configuration command. The no form of this command restores the default value.

atm vp-filter hexvalue
no atm vp-filter

Syntax Description

hexvalue

Value in hexadecimal format. Default is 0x7B.

Default

0x7B

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command is supported on Cisco  7500 series routers, but not on Cisco  4500 and Cisco  4700 routers. This command is not supported on ATM port adapters.

This command allows you to specify a VPI or range of VPIs to be used for AAL3/4 processing. All other VPIs map to AAL5 processing. If only AAL5 processing is required, you can either let the virtual path filter default or set it to an arbitrary VPI so that AAL5 processing is performed on all VPIs.

This command configures the hexadecimal value used in the virtual path filter register in the reassembly operation. The virtual path filter comprises 16 bits. The virtual path filter register uses the most significant bits (bits 15 through 8, the left half of the filter) as mask bits, and uses bits 7 through 0 (the right half of the filter) as compare bits.

When a cell is received, the right half of the filter is exclusively NORed with the binary value of the incoming VPI. The result is then ORed with the left half of the filter (the mask). If the result is all 1s, then reassembly is done using the VCI/MID table (AAL3/4 processing). Otherwise, reassembly is done using the VPI-VCI pair table (AAL5 processing).

Examples

In the following example, all incoming cells are reassembled using AAL3/4 processing:

atm vp-filter ff00

In the following example, all incoming cells with the virtual path equal to 0 are reassembled using AAL3/4 processing; all other cells are reassembled using AAL5 processing:

atm vp-filter 0

In the following example, all incoming cells with the most significant bit of the virtual path set are reassembled using AAL3/4 processing; all other cells are reassembled using AAL5 processing:

atm vp-filter 7f80

broadcast

To configure broadcast packet duplication and transmission for an ATM PVC, SVC, or VC class, use the broadcast command in the appropriate command mode. Use the no form of this command to disable transmission of broadcast packets for your ATM PVC, SVC, or VC class. Use the default form of this command to restore the default behavior according to the description in the "Usage Guidelines" section below.

broadcast
no broadcast
default broadcast

Syntax Description

This command has no arguments or keywords.

Default

Disabled. For classical IP SVCs, broadcast is enabled.

Command Mode

Interface-ATM-VC configuration (for ATM PVCs and SVCs)

VC-class configuration (for a VC class)

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 T.

If broadcasting and multipoint signaling is enabled on an SVC, a multipoint SVC will be created to handle the SVC.


Note If you use the protocol command to configure broadcasting for an ATM PVC, SVC, or VC class, this configuration takes precedence over any previous configuration using the broadcast command.

If the broadcast command is not explicitly configured on an ATM PVC or SVC, the VC inherits the following default configuration (listed in order of next highest precedence):

Example

The following command enables the transmission of broadcast packets on an ATM PVC named router5:

pvc router5 1/32
 broadcast

Related Commands

You can use the master indexes or search online to find documentation of related commands.

protocol

ces aal1 clock

To configure the AAL1 timing recovery clock for the CBR interface, use the ces aal1 clock interface configuration command. To return the clock to the default, use the no form of this command.

ces aal1 clock {adaptive | srts | synchronous}
no ces aal1 clock

Syntax Description

adaptive

Adjusts output clock on a received AAL1 on first-in, first-out basis. Use in unstructured mode.

srts

Sets the clocking mode to synchronous residual time stamp.

synchronous

Configures the timing recovery to synchronous for structured mode.

Default

synchronous

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

The clock mode must be synchronous for structured mode. In unstructured mode, use adaptive when a network-derived clock is not available.

Use srts when a network-derived clock is available but devices attached to the CES port use a different clock reference. The srts keyword samples the incoming clock, subtracts from the network clock, and sends the remainder in an AAL1 header. The clock is reconstructed during output by adding the residual to the network reference.

Use synchronous for all other modes.

Example

The following command sets the AAL1 timing recovery clock to adaptive mode:

interface cbr 4/0
  ces aal1 clock adaptive

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 service
ces dsx1 clock source
network-clock-select

ces aal1 service

To configure the type of circuit emulation service used on the CBR interface, use the ces aal1 service interface configuration command. To return the type of service to unstructured, use the no form of the command.

ces aal1 service {structured | unstructured}
no ces aal1 service

Syntax Description

structured

Sets the type of service to structured (cross-connect).

unstructured

Sets the type of service to unstructured (clear-channel).

Default

unstructured

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

The structured keyword means that each time slot is an independent entity grouped into circuits, where each circuit has an independent PVC.

The unstructured keyword reduces the incoming serial data on the receiving end of the ATM network. The keyword also sets the service to single circuit, single PVC, where all time slots are carried.

Example

The following example changes the mode for the ces aal1 service command to structured.

interface cbr 4/0
  ces aal1 service structured

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 clock
ces circuit
ces dsx1 clock source
ces dsx1 framing
ces dsx1 lbo
ces dsx1 linecode
ces dsx1 loopback
ces dsx1 signalmode robbedbit
ces pvc
show ces circuit
show ces interface cbr
show ces status
show interface cbr

ces circuit

To configure the connection attributes for the CBR interface, use the ces circuit interface configuration command. To return the connection attributes to the default or to enable the circuit, use the no form of this command.

ces circuit circuit-number [cas] [cdv range] [circuit-name name] [on-hook-detection
hex-number] [partial-fill range] [shutdown] [timeslots range]
no ces circuit circuit-number [cas] [cdv range] [circuit-name name] [on-hook-detection
hex-number] [partial-fill range] [shutdown] [timeslots range]

Syntax Description

circuit-number

Selects the circuit identification. For unstructured service, use 0. For T1 structured service, the range is 1  through 24. For E1 structure service, the range is 1  through 31.

cas

(Optional) Enables channel associated signaling for structured service only. The default is no cas.

cdv range

(Optional) Enables the peak-to-peak cell delay variation requirement. The range for CDV is 1  through 65535 milliseconds. The default is 2000 milliseconds.

circuit-name name

(Optional) Sets the ASCII name for the CES-IWF circuit. The string for the circuit name is 0  through 255. The default is CBRx/x:0.

on-hook-detection hex-number

(Optional) Enables detection of whether the circuit is on-hook. Hex values are 0 through F to indicate a 2- or 4-bit AB[CD] pattern to detect on-hook. The AB[CD] bits are determined by the manufacturer of the voice/video telephony device that is generating the CBR traffic.

partial-fill range

(Optional) Enables the partial AAL1 cell fill service for structured service only. The range is 0  through 47. The default is 47.

shutdown

(Optional) Marks the CES-IWF circuit administratively down. The default is no shutdown.

timeslots range

(Optional) Configures the time slots for the CES-IWF circuit for structured service only. The range is 1 through 24 for T1. The range is 1 through 31 for E1.

Default

No circuit is configured.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

For unstructured service, the circuit number is 0. For T1 structured service, the circuit number is 1 through 24. For E1 structured service, the time slots are 1 through 31.

Channel-associated signaling (CAS) provides information about the time slot (on or off the hook) and is updated once per multiframe.

With both the CAS and on-hook detection features enabled, these features work together to enable an ingress node in an ATM network to monitor on-hook and off-hook conditions for a specified 1  x  64 structured CES circuit. As implied by the notation "1 x 64," the on-hook detection (or bandwidth-release) feature is supported only in a structured CES circuit that involves a single time slot at each end of the connection.

The time slot configured for the structured CES circuit at the ingress node (time slot 2) can be different from the DS0 time slot configured at the egress node (time slot 4). Only one such time slot can be configured at each end of the circuit when the on-hook detection feature is used.

When you invoke the on-hook feature, the ingress ATM-CES port adapter monitors the ABCD bits in the incoming CBR bit stream to detect on-hook and off-hook conditions in the circuit. In an "off-hook" condition, all the bandwidth provisioned for the specified CES circuit is used for transporting ATM AAL1 cells across the network from the ingress node to the egress node.

In an on-hook condition, the network periodically sends dummy ATM cells from the ingress node to the egress node to maintain the connection. However, these dummy cells consume only a fraction of the circuit's reserved bandwidth, leaving the rest of the bandwidth available for use by other network traffic. This bandwidth-release feature enables the network to make more efficient use of its resources.

When the CAS feature is enabled for a CES circuit, the bandwidth of the DS0 channel is limited to 56 kbps for user data, because CAS functions consume 8 kbps of channel bandwidth for transporting the ABCD signaling bits. These signaling bits are passed transparently from the ingress node to the egress node as part of the ATM AAL1 cell stream.

In summary, when the optional CAS and on-hook detection features are enabled, the following conditions apply:

Example

The following example sets the structured service CDV range to 5000 milliseconds and enables the interface.

interface cbr 4/0
  ces circuit 3 cdv 5000
  ces circuit 3 no shutdown

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 service
show ces circuit
show ces interface cbr
show ces status
show interface cbr

ces dsx1 clock source

To configure a transmit clock source for the CBR interface, use the ces dsx1 clock source interface configuration command. To return the clock source to the default, use the no form of this command.

ces dsx1 clock source {loop-timed | network-derived}
no ces dsx1 clock source

Syntax Description

loop-timed

Configures the transmit clock to loop (RX-clock to TX-clock).

network-derived

Configures the transmit clock to be derived from the network.

Default

network-derived

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

Use the command to configure the transmit clock source to the ATM-CES port adapter.

Example

The following example sets the clock source to loop-timed.

interface cbr 4/0
  ces dsx1 clock source loop-timed

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 clock
ces aal1 service
network-clock-select
show ces circuit
show ces interface cbr
show interface cbr

ces dsx1 framing

To select the frame type for the data line on the CBR interface, use the ces dsx1 framing interface configuration command. To return the frame type to the default, use the no form of this command.

ces dsx1 framing {esf | sf} (for T1)
ces dsx1 framing {e1_crc_mfCASlt | e1_crc_mf_lt | e1_lt | e1_mfCAS_lt} (for  E1)
no ces dsx1 framing

Syntax Description

esf

Configures the line type to extended super frame for T1. This is the default for T1.

sf

Configures the line type to super frame for T1.

e1_crc_mfCASlt

Configures the line type to E1 CRC with channel-associated signaling (CAS) enabled.

e1_crc_mf_lt

Configures the line type to E1 CRC with CAS disabled.

e1_lt

Configures the line type to E1 with CAS disabled. This is the default for E1.

e1_mfCAS_lt

Configures the line type to E1 with CAS enabled.

Default

esf (for T1)

e1_lt (for E1)

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

Use this command in configurations where the router communicates with the data line. The service provider determines which framing type is required for your circuit.

Example

The following example sets the data line type to super frame.

interface cbr 4/0
  ces dsx1 framing sf

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 service
show ces circuit
show ces interface cbr
show ces status
show interface cbr

ces dsx1 lbo

To configure cable length for the CBR interface, use the ces dsx1 lbo interface configuration command. To return the cable length to the default, use the no form of this command.

ces dsx1 lbo length
no ces dsx1 lbo

Syntax Description

length

Sets the cable length. Values are (in feet): 0_110, 110_200, 220_330, 330_440, 440_550, 550_660, 660_above, and square_pulse. The default is 0_110 feet.

Default

0_110 feet

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

Set the cable length to the desired number of feet on your system.

Example

The following example sets the cable length to 440 feet:

interface cbr 4/0
  ces dsx1 lbo 440_550

Related Commands

You can use the master indexes or search online to find documentation of related commands.

atm lbo
ces aal1 service
show ces circuit
show ces interface cbr
show ces status
show interface cbr

ces dsx1 linecode

To select the linecode type for the CBR interface, use the ces dsx1 linecode interface configuration command. To return the linecode to the default, use the no form of this command.

ces dsx1 linecode {ami | b8zs} (for T1)
ces dsx1 linecode {ami | hdb3} (for E1)
no ces dsx1 linecode

Syntax Description

ami

Specifies the alternate mark inversion (AMI) as the linecode type. Valid for T1 and E1 interfaces.

b8zs

Specifies B8ZS as the linecode type. Valid for T1 interfaces. This is the default for T1.

hdb3

Specifies HDB3 as the linecode type. Valid for E1 interfaces. This is the default for E1.

Default

b8zs (for T1)
hdb3 (for E1)

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

Use this command in configurations where the switch communicates with the data line. The service provider determines which linecode type is required for your circuit.

Example

The following example specifies B8ZS as the linecode type:

interface cbr 4/0
  ces dsx1 linecode b8zs

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 service
show ces circuit
show ces interface cbr
show ces status
show interface cbr

ces dsx1 loopback

To enable a loopback for the CBR interface, use the ces dsx1 loopback interface configuration command. To disable the loopback, use the no form of this command.

ces dsx1 loopback {line | noloop | payload}
no ces dsx1 loopback {line | noloop | payload}

Syntax Description

line

Sets the received signal to be looped at the line (does not penetrate the  line).

noloop

Sets the interface to no loop.

payload

Sets the received signal to be looped through the device and returned.

Default

No loopback is set.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

This command is useful when testing the circuit emulation port adapter module.

Example

The following example sets a payload loopback:

interface cbr 4/0
  ces dsx1 loopback payload

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 service
loopback
show ces circuit
show ces interface cbr
show ces status
show interface cbr

ces dsx1 signalmode robbedbit

To enable the signal mode as robbed bit on a CBR interface, use the ces dsx1 signalmode robbedbit interface configuration command. To return the signal mode to the default, use the no form of this command.

ces dsx1 signalmode robbedbit
no ces dsx1 signalmode robbedbit

Syntax Description

This command has no keywords or arguments.

Default

No signal mode is enabled.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

A T1 frame consists of 24 time slots (DS0) that send at a rate of 64 kbps. T1 defines the ability to send signaling in-band on individual time slots by removing the low bit of each byte for signaling in robbedbit mode. This procedure allows 8 kbps for signaling and leaves 56 kbps for data.

In structured mode, you can send the T1 signaling information across the network. This means that after you enable robbedbit signaling mode on the port, and enable CAS on individual circuits that need this type of service, you are robbing bits from the DS0. The system then puts the bits in the specified format to be sent across the network and reinserts them at the passive side on the CES-IWF connection.

Example

The following example enables channel associated signaling and robbed bit signaling:

interface cbr 4/0
  ces circuit 1 cas
  ces dsx1 signalmode robbedbit

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 service
ces circuit
show ces circuit
show ces interface cbr
show ces status
show interface cbr

ces pvc

To configure the destination port for the circuit on the CBR interface, use the ces pvc interface configuration command. To remove the destination port on the circuit, use the no form of this command.

ces pvc circuit-number interface atm slot/port vpi number vci number
no ces pvc circuit-number interface atm slot/port vpi number vci number

Syntax Description

circuit-number

Selects the circuit identification. The range is 0 to 24. For unstructured service, use 0. For T1 structure service, the range is 1  through 24. For E1 structure service, the range is 1 through 31.

interface atm slot/port

Slot and port number of the ATM interface. Used to create a hard PVC. Only a hard PVC can be configured for the CBR interfaces on the ATM-CES port adapter.

vpi number

Virtual path identifier of the destination PVC. Range is 0  through  255.

vci number

Virtual channel identifier of the destination PVC. Range is 1  through  16383.

Default

No destination port is configured.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

Use the interface option to create a hard PVC. Use the dest-atm-addr option to create a soft PVC. Soft PVCs are not supported on Cisco 7200 series routers.

You must configure both sides of the CES circuits because at the source (the active side in CES-IWF), the time slots are not recognized at the destination (the passive side).

Each CES circuit has an ATM address. When configuring the source PVC, you need the destination ATM address.

Example

The following example shows setting a hard PVC. In this example, the destination of ATM port 0 in slot 1 is assigned to circuit 31 on CBR port 0 in slot 4.

interface cbr 4/0
  ces pvc 31 interface atm 1/0 vpi 0 vci 512

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 service
show ces circuit
show ces interface cbr
show ces status
show interface cbr

class

To assign a VC class to an ATM main interface, subinterface, PVC, or SVC, use the class command in the appropriate command mode. Use the no form of this command to remove a VC class.

class vc-class-name
no class vc-class-name

Syntax Description

vc-class-name

Name of the VC class you are assigning to your ATM main interface, subinterface, PVC, or SVC.

Default

No VC class is assigned.

Command Mode

Interface configuration (for ATM main and subinterfaces)

Interface-ATM-VC configuration (for ATM PVCs and SVCs)

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 T.

Use this command to assign a previously defined set of parameters to an ATM main interface, subinterface, PVC, or SVC. This set of parameters is defined in a VC class.

Examples

The following example assigns a VC class named atm-ubr to a PVC named router5. This VC class may contain UBR settings that were configured using the ubr command.

pvc router5 1/32
  class atm-ubr

The following example assigns a VC class named atm-svc-parameters to an SVC named lion. This VC class may contain ATM SVC default parameters.

svc lion 47.0091.81.000000.0040.0B0A.2501.ABC1.3333.3333.05
  class atm-svc-parameters

dxi map

To map a protocol address to a given VPI and VCI, use the dxi map interface configuration command. Use the no form of this command to remove the mapping for that protocol and protocol address.

dxi map protocol protocol-address vpi vci [broadcast]
no dxi map
protocol protocol-address

Syntax Description

protocol

One of the following bridging or protocol keywords: apollo, appletalk, bridge, clns, decnet, ip, novell, vines, or xns.

protocol-address

Protocol-specific address.

vpi

Virtual path identifier in the range 0 to 15.

vci

Virtual circuit identifier in the range 0 to 63.

broadcast

(Optional) Broadcasts should be forwarded to this address.

Default

No map definition is established.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

This command is used in configurations where the router is intended to communicate with an ATM network through an ATM data service unit (ADSU). Given the circuit identifier parameters (VPI and VCI) for the ATM permanent virtual circuit (PVC), the router computes and uses the DXI frame address (DFA) that is used for communication between the router and the ADSU.

The dxi map command can be used only on a serial interface or HSSI configured for ATM-DXI encapsulation.

Example

The following example converts all IP packets intended for the host with IP address 172.21.170.49 into ATM cells identified with a VPI of 2 (binary 0000 0010) and a VCI of 46 (binary 0000 0000 0010 1110) by the ADSU:

interface serial 0
dxi map ip 172.21.170.49 2 46 broadcast

Using the mapping defined in Annex A of the ATM DXI Specification, the router uses the VPI and VCI information in this example to compute a DFA of 558 (binary 1000101110). The ADSU will use the DFA of the incoming frame to extract the VPI and VCI information when formulating ATM cells.

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dxi pvc
encapsulation atm-dxi

dxi pvc

To configure multiprotocol or single protocol ATM-DXI encapsulation, use the dxi pvc interface configuration command. The no form of this command disables multiprotocol ATM-DXI encapsulation.

dxi pvc vpi vci [snap | nlpid | mux]
no dxi pvc vpi vci [snap | nlpid | mux]

Syntax Description

vpi

ATM network virtual path identifier (VPI) of this PVC, in the range from 0 through 255. The VPI is an 8-bit field in the header of the ATM cell. The VPI value is unique only on a single interface, not throughout the ATM network, because it has local significance only.

Both vpi and vci cannot be specified as 0; if one is 0, the other cannot be 0.

vci

ATM network virtual channel identifier (VCI) of this PVC, in the range of 0 through 65535. The VCI is a 16-bit field in the header of the ATM cell. The VCI value is unique only on a single interface, not throughout the ATM network, because it has local significance only.

Both vpi and vci cannot be specified as 0; if one is 0, the other cannot be 0.

snap

(Optional) LLC/SNAP encapsulation based on the protocol used in the packet. This keyword defines a PVC that can carry multiple network protocols. This is the default.

nlpid

(Optional) RFC 1294/1490 encapsulation. This option is provided for backward compatibility with the default encapsulation in earlier versions of the Cisco  IOS software.

mux

(Optional) MUX encapsulation; the carried protocol is defined by the dxi map command when the PVC is set up. This keyword defines a PVC that carries only one network protocol.

Default

LLC/SNAP encapsulation.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

This command can be used only on a serial interface or HSSI that is configured with ATM-DXI encapsulation.

Select the nlpid option if software earlier than Cisco  IOS Release 10.3 was loaded on this router, and the router was configured for the default encapsulation, which was nlpid before Release  10.3.

Examples

The following example configures ATM-DXI MUX encapsulation on serial interface 1. The PVC identified by a VPI of 10 and a VCI of 10 can carry a single protocol. Then the protocol to be carried on this PVC is defined by the dxi map command.

interface serial 1
 dxi pvc 10 10 mux  dxi map ip 172.21.176.45 10 10 broadcast

The following example configures ATM-DXI NLPID encapsulation on serial interface 1. The PVC identified by a VPI of 11 and a VCI of 12 can carry multiprotocol traffic that is encapsulated with a header described in RFC 1294/1490.

interface serial 1
  dxi pvc 11 12 nlpid

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dxi map
encapsulation atm-dxi
show dxi pvc

encapsulation

To configure the ATM adaptation layer (AAL) and encapsulation type for an ATM PVC, SVC, or VC class, use the encapsulation command in the appropriate command mode. Use the no form of this command to remove an encapsulation from a PVC, SVC, or VC class.

encapsulation aal-encap [virtual-template number]
no encapsulation aal-encap [virtual-template number]

Note To configure ILMI, QSAAL, or SMDS encapsulations for an ATM PVC, use the pvc command.

Syntax Description

aal-encap

ATM adaptation layer (AAL) and encapsulation type. When aal5mux is specified, a protocol is required. Possible values for aal-encap are as follows:

aal5ciscoppp---For Cisco PPP over ATM. Supported on ATM PVCs only.

aal5mux apollo---For a multiplex (MUX)-type virtual circuit using the Apollo protocol.

aal5mux appletalk---For a MUX-type virtual circuit using the AppleTalk protocol.

aal5mux decnet---For a MUX-type virtual circuit using the DECnet protocol.

aal5mux frame---For a MUX-type virtual circuit for Frame Relay-ATM Internetworking on the Cisco  MC3810.

aal5mux ip---For a MUX-type virtual circuit using the IP protocol.

aal5mux ipx---For a MUX-type virtual circuit using the IPX protocol.

aal5mux vines---For a MUX-type virtual circuit using the VINES protocol.

aal5mux voice---For a MUX-type virtual circuit for voice over ATM on the Cisco  MC3810.

aal5mux xns---For a MUX-type virtual circuit using the XNS protocol.

aal5nlpid---Allows ATM interfaces to interoperate with High-Speed Serial Interfaces (HSSIs) that are using an ATM data service unit (ADSU) and running ATM-Data Exchange Interface (DXI). Supported on ATM PVCs only.

aal5snap---The only encapsulation supported for Inverse ARP. Logical Link Control/Subnetwork Access Protocol (LLC/SNAP) precedes the protocol datagram.

virtual-template number

(This argument is required for aal5ciscoppp encapsulation only). Specifies the number used to identify the virtual template.

Default

The global default encapsulation is aal5snap. See the "Usage Guidelines" section for other default characteristics.

Command Mode

Interface-ATM-VC configuration (for an ATM PVC or SVC)

VC-class configuration (for a VC class)

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 T.

Use of one of the aal5mux encapsulation options to dedicate the specified PVC to a single protocol; use the aal5snap encapsulation option to multiplex two or more protocols over the same PVC. Whether you select aal5mux or aal5snap encapsulation might depend on practical considerations, such as the type of network and the pricing offered by the network. If the network's pricing depends on the number of PVCs set up, aal5snap might be the appropriate choice. If pricing depends on the number of bytes transmitted, aal5mux might be the appropriate choice because it has slightly less overhead.

When configuring Cisco PPP over ATM, specify the aal5ciscoppp encapsulation for the aal-encap argument and specify the virtual template number.

It is possible to implicitly create a virtual template when configuring Cisco PPP over ATM. In other words, if the parameters of the virtual template are not explicitly defined before configuring the ATM PVC, the PPP interface will be brought up using default values from the virtual template identified. However, some parameters (such as an IP address) take effect only if they are specified before the PPP interface comes up. Therefore, we recommend that you explicitly create and configure the virtual template before configuring the ATM PVC to ensure such parameters take effect.

If you specify virtual template parameters after the ATM PVC is configured, you should issue a shutdown command followed by a no shutdown command on the ATM subinterface to restart the interface, causing the newly configured parameters (such as an IP address) to take effect.

If the encapsulation command is not explicitly configured on an ATM PVC or SVC, the VC inherits the following default configuration (listed in order of next highest precedence):

Example

The following example configures an ATM PVC with VPI 0 and VCI 33 for a MUX-type encapsulation using IP:

pvc 0/33
encapsulation aal5mux ip

encapsulation atm-dxi

Use the encapsulation atm-dxi interface configuration command to enable ATM-DXI encapsulation. The no form of this command disables ATM-DXI.

encapsulation atm-dxi
no encapsulation atm-dxi

Syntax Description

This command has no arguments or keywords.

Default

HDLC

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

Example

The following example configures ATM-DXI encapsulation on serial interface 1:

interface serial 1
encapsulation atm-dxi

Related Commands

You can use the master indexes or search online to find documentation of related commands.

dxi map

idle-timeout

To configure the idle timeout parameter for tearing down an ATM SVC connection, use the idle-timeout command in the appropriate command mode. Use the no form of this command to disable the timeout parameter.

idle-timeout seconds [minimum-rate]
no idle-timeout seconds [minimum-rate]

Syntax Description

seconds

Number of seconds that the SVC is idle (no traffic flows), after which the ATM SVC connection torn down.

minimum-rate

(Optional) Minimum traffic rate in kilobits per second (Kbps) required on an ATM SVC to maintain the SVC connection.

Default

seconds = The value set using the interface configuration atm idle-timeout command. If the atm idle-timeout is not configured, the default is 300 seconds; minimum-rate  =  0 Kbps.

Command Mode

Interface-ATM-VC configuration (for an ATM PVC or SVC)

VC-class configuration (for a VC class)

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 T.


Note If within the idle timeout period, both the input and output traffic rates are below the minimum-rate, the SVC connection is torn down. The input and output traffic rates are set using the ubr, ubr+, or vbr-nrt command.

If the idle-timeout command is not explicitly configured on an ATM SVC, the SVC inherits the following default configuration (listed in order of next highest precedence):

Example

The following example configures an ATM SVC connection to be inactive if no traffic flows for an idle period of 300  seconds. The SVC connection is also configured so that it is considered inactive if the traffic rate is less than 5  Kbps:

idle-timeout 300 5

Related Commands

You can use the master indexes or search online to find documentation of related commands.

atm idle-timeout
ubr
ubr+
vbr-nrt

ilmi manage

To enable ILMI management on an ATM PVC, use the ilmi manage command in the appropriate command mode. Use the no form of this command to disable ILMI management.

ilmi manage
no ilmi manage

Syntax Description

This command has no arguments or keywords.

Default

ILMI management is disabled.

Command Mode

Interface-ATM-VC configuration (for an ATM PVC)

VC-class configuration (for a VC class)

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 T.

If the ilmi manage command is not explicitly configured on an ATM PVC, the PVC inherits the following default configuration (listed in order of next highest precedence):

Example

The following example enables ILMI management on the ATM PVC with VPI 0 and VCI 60. The ILMI PVC is assigned the name routerA and the VPI and VCI are 0 and 16, respectively.

interface atm 0/0
  pvc routerA 0/16 ilmi
  exit
interface atm 0/0.1 multipoint
  pvc 0/60
  ilmi manage

inarp

To configure the Inverse ARP time period for an ATM PVC or VC class, use the inarp command in the appropriate command mode. Use the no form of this command to store the default Inverse  ARP time period behavior.

inarp minutes
no inarp minutes

Syntax Description

minutes

Number of minutes for the Inverse ARP time period. Default is 15  minutes.

Default

When Inverse ARP is enabled, minutes = 15 minutes.

Command Mode

Interface-ATM-VC configuration (for an ATM PVC)

VC-class configuration (for a VC class)

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 T.

This command is only supported for aal5snap encapsulation when Inverse ARP is enabled. Refer to the encapsulation command for configuring aal5snap encapsulation and the protocol command for enabling Inverse ARP.

If the inarp command is not explicitly configured on an ATM PVC, the PVC inherits the following default configuration (listed in order of next highest precedence):

Example

The following example sets the Inverse ARP time period for 10 minutes:

inarp 10

Related Commands

You can use the master indexes or search online to find documentation of related commands.

encapsulation
protocol

interface atm

To configure an ATM interface type and enter interface configuration mode, use the interface atm global configuration command.

interface atm slot/0 (for the AIP on Cisco  7500 series routers; for the ATM port adapter,
ATM-CES port adapter, and enhanced ATM port adapter on Cisco  7200 series routers;
for the 1-port ATM-25 network module on Cisco  2600 and 3600 series routers)
interface atm slot/port-adapter/0 (for the ATM port adapter and enhanced ATM port adapter on
Cisco 7500 series routers)
interface atm number (for the NPM on Cisco 4500 and 4700 routers)

To configure a subinterface, use the interface atm global configuration command.

interface atm slot/0.subinterface-number {multipoint | point-to-point} (for the AIP on
Cisco  7500 series routers; for the ATM port adapter, ATM-CES port adapter, and enhanced
ATM port adapter on Cisco  7200 series routers; for the 1-port ATM-25 network module on
Cisco  2600 and 3600 series routers)
interface atm slot/port-adapter/0.subinterface-number {multipoint | point-to-point} (for the
ATM port adapter and enhanced ATM port adapter on Cisco 7500 series routers)
interface atm number.subinterface-number {multipoint | point-to-point} (for the NPM on
Cisco  4500 and  4700 routers)

Syntax Description

slot

On the Cisco 7000 series routers with RSP7000 and Cisco 7200 series, specifies the backplane slot number. On the 7000, value can be 0, 1, 2, 3, or 4. On the Cisco 7010, value can be 0, 1, or 2. The slots are numbered from left to right. On the Cisco 7505, the slot number can be 0, 1, 2, or 3 from bottom to top. On the Cisco 7507, the slot number can be 0 and 1 (CyBus0) and 4 through 6 (Cybus1), from left to right. On the Cisco 7513, the slot numbers are 0 through 5 (CyBus 0) and 8 through 12 (CyBus 1), from left to right.

/0

ATM port number. Because the AIP and all ATM port adapters have a single ATM interface, the port number is always 0.

port-adapter

ATM port adapter number for the ATM port adapter or enhanced ATM port adapter on Cisco  7500 series routers. The value can be 0 or 1.

number

On Cisco 4500 and Cisco 4700 routers, specifies the NPM number. The numbers are assigned at the factory at the time of installation or when added to a system, and can be displayed with the show interfaces command.

.subinterface-number

Subinterface number in the range 1 to 4294967293.

multipoint | point-to-point

Specifies a multipoint or point-to-point subinterface. There is no default.

Default

None

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

Example

The following example assigns an IP network address and network mask to the ATM interface in slot  1 on port  0 of a Cisco 7500 series router:

interface atm 1/0
 ip address 1.1.1.1.255.255.255.0

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show interfaces atm

interface cbr

To specify the T1 or E1 constant bit rate interface on an ATM-CES port adapter, and enter interface configuration mode, use the interface cbr global configuration command.

interface cbr slot/port

Syntax Description

slot

Backplane slot number.

port

Interface port number.

Default

None

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco  IOS Release 11.1 CA for the ATM-CES port adapter.

The ATM-CES port adapter has four T1 (1.544 Mbps) or four E1 (2.048 Mbps) ports (75- or 120-ohm) that can support both structured (N x 64 kbps) and unstructured ATM Forum-compliant circuit emulation services (CES), and one port that supports an OC-3 (155 Mbps) single-mode intermediate reach interface or a T3 (45 Mbps) or E3 (34 Mbps) standards-based ATM interface.

Example

The following example specifies the first T1 or E1 port on the ATM-CES port adapter in slot 1:

interface cbr 1/0

Related Commands

You can use the master indexes or search online to find documentation of related commands.

show ces interface cbr
show interface cbr

loopback

To place the ATM interface into loopback mode, use the following form of the loopback interface configuration command. To remove the loopback, use the no form of this command.

loopback [cell | line | payload]
no loopback [cell | line | payload]

Syntax Description

cell

(Optional) Places the interface into external loopback at cell level.

line

(Optional) Places the interface into external loopback at the line. This is the default.

payload

(Optional) Places the interface into external loopback at the payload level.

Default

line; packets loop from the ATM interface back to the ATM network.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.0.

This command was modified in Cisco IOS Release 11.1 CC to remove the diagnostic and test options for the PA-A3 enhanced ATM port adapter.

This command is useful for testing because it loops all packets from the ATM interface back to the interface as well as directing the packets to the network.

Use the loopback line command to check that the PA-A3 port adapter is working by looping the receive data back to the transmit data.

Example

The following example loops all packets back to the ATM interface:

interface atm 4/0
  loopback

Related Command

You can use the master indexes or search online to find documentation of related commands.

ces dsx1 loopback

mid

To set the range of message identifier (MID) values on a PVC, use the mid interface-ATM-VC configuration command. To remove MID value range settings, use the no form of this command.

mid midlow midhigh
no mid midlow midhigh

Syntax Description

midlow

Starting MID number for this PVC. This value can be anywhere in the range of 0 to 1023.

midhigh

Ending MID number for this PVC. This value can be anywhere in the range of the midlow value to 1023.

Default

The default for both the midlow and midhigh values is 0.

Command Mode

Interface-ATM-VC configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3(2)T.

This command is only available when SMDS encapsulation is configured on a PVC.

Use this command to assign different ranges of message identifiers to different PVCs.

Example

In the following example, the atm mid-per-vc command limits the maximum number of message identifiers to 32 for each VC on the ATM interface. Using the mid command, the selected range of numbers that are available for the message identifiers on PVC 1/40 is 0 to 31. For PVC 2/50, the range is 32 to 63:

interface atm 2/0
  atm mid-per-vc 32
  pvc 1/40 smds
  mid 0 31
  pvc 2/50 smds
  mid 32 63

network-clock-select

To establish the sources and priorities of the requisite clocking signals for an ATM-CES port adapter, use the network-clock-select global configuration command. To remove the clock source, use the no form of this command.

network-clock-select priority {cbr | atm} slot/port
no network-clock-select priority {cbr | atm} slot/port

Syntax Description

priority

Specifies the priority of the clock source. Values are 1 (highest priority) to 4 (lowest priority).

cbr

Specifies a CBR interface to supply the clock source.

atm

Specifies an ATM interface to supply the clock source.

slot

Backplane slot number.

port

Interface port number.

Default

No priority clock source is established.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.1 CA.

To support synchronous or synchronous residual time stamp (SRTS) clocking modes on the CBR interface, you must specify a primary reference source to synchronize the flow of CBR data from its source to its destination.

You can specify up to four clock priorities. The highest priority active interface in the router supplies primary reference source to all other interfaces that require network clock synchronization services. The fifth priority is the local oscillator on the ATM-CES port adapter.

Use the show network-clocks command to display the currently configured clock priorities on the router.

Example

The following example defines two clock priorities on the router:

network-clock-select 1 cbr 2/0
network-clock-select 2 atm 2/0

Related Commands

You can use the master indexes or search online to find documentation of related commands.

ces aal1 clock
ces dsx1 clock source
show network-clocks


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