Table of Contents

C Commands

The commands shown in this chapter apply to the Catalyst 8540 MSR, Catalyst 8510 MSR, and LightStream 1010 ATM switch routers. Where an entire command or certain attributes of a command have values specific to a particular switch or switch router, an exception is indicated by the following callouts:

Refer to Appendix D of this command reference for a detailed list of commands that have been removed, changed or replaced.

cablelength

To configure the cable length for a channelized DS-3 (CDS3) Frame Relay port adapter, use the cablelength controller configuration command. To restore the default cable length, use the no form of this command.

cablelength value

no cablelength value

Syntax Description

Defaults

224 feet

Command Modes

Controller configuration

Command History

Usage Guidelines

Although you can specify a cable length from 0 to 450 feet, the hardware only recognizes two ranges: 0 to 224, and 225 to 450.

For example, if you enter 150 feet, the 0 to 224 range is used. If you later change the cable length to 200 feet, there is no change because 200 is within the 0 to 224 range. However, if you change the cable length to 250, the 225 to 450 range is used. The actual number you enter is stored in the configuration file.

Examples

The following example configures the cable length on controller t3 to 450 feet.

called-address-mask

To configure the address mask for identifying valid bits of the called NSAP address field, use the called-address-mask ATM signalling diagnostics configuration command. To return the address mask to the default, use the no form of this command.

called-address-mask atm-address-mask

no called-address-mask

Syntax Description

Defaults

NULL

Command Modes

ATM signalling diagnostics configuration

Command History

Usage Guidelines

To match this selection criteria, a failed connect setup must have a called party address value equal to the configured called party address for all bits that are 1 in the value of the mask specified with the command. When the default value is retained, the rejected call matches the filter criteria for any called address in the rejected call.

Examples

The following example shows configuring a called address mask string.

called-nsap-address

To configure the NSAP-format ATM address for the signalling diagnostics filter entry, use
the called-nsap-address ATM signalling diagnostics configuration command. To remove any configured address, use the no form of this command.

called-nsap-address nsap-address

no called-nsap-address

Syntax Description

Defaults

NULL

Command Modes

ATM signalling diagnostics configuration

Command History

Usage Guidelines

NSAP-format ATM end-system addresses have a fixed length of 40 hexadecimal digits. You should configure the address using the following dotted format:

Note   The dots can be omitted.

Examples

The following example shows setting a called NSAP address.

calling-address-mask

To configure the address mask for identifying valid bits of the calling-nsap-address field in the signalling diagnostics filter table entry, use the calling-address-mask ATM signalling diagnostics configuration command. To set to the default value, use the no form of this command.

calling-address-mask atm-address-mask

no calling-nsap-address

Syntax Description

Defaults

NULL

Command Modes

ATM signalling diagnostics configuration

Command History

Usage Guidelines

To match this selection criteria, a failed connect setup must have a calling party address value equal to the configured calling party address for all bits that are 1 in the value of the mask specified through the command. When the default value is retained, the rejected call matches the filter criteria for any calling address in the rejected call.

Examples

The following example shows a calling address mask.

calling-nsap-address

To configure the NSAP-format ATM address for the signalling diagnostics filter entry, use the calling-nsap-address ATM signalling diagnostics configuration command. To remove any configured address, use the no form of this command.

calling-nsap-address nsap-address

no calling-nsap-address

Syntax Description

Defaults

NULL

Command Modes

ATM signalling diagnostics configuration

Command History

Usage Guidelines

NSAP-format ATM end-system addresses have a fixed length of 40 hexadecimal digits. You should configure the address using the following dotted format:

Note   The dots can be omitted.

Examples

The following example shows setting a calling NSAP address.

cast-type

To filter ATM signalling call failures by connection type (point-to-point or point-to-multipoint), use the cast-type ATM signalling diagnostics configuration command. To disable this feature, use the no form of this command.

cast-type {all | p2p | p2mp}

no cast-type

Syntax Description

Defaults

all

Command Modes

ATM signalling diagnostics configuration

Command History

Examples

The following example shows call failures filtered by point-to-point connection.

ces aal1 clock

To configure the AAL1 timing recovery clock for T1/E1 interfaces, use the ces aal1 clock interface configuration command. To revert to the default setting, use the no form of this command.

ces aal1 clock {adaptive | srts | synchronous}

no ces aal1 clock {adaptive | srts | synchronous}

Syntax Description

Defaults

synchronous

Command Modes

Interface configuration

Command History

Usage Guidelines

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.

Examples

The following command shows setting the AAL1 timing recovery clock to adaptive mode.

ces aal1 service

To configure the type of ces service, use the ces aal1 service interface configuration command.
To revert to the default setting, use the no form of this command.

ces aal1 service {structured | unstructured}

no ces aal1 service {structured | unstructured}

Syntax Description

Defaults

unstructured

Command Modes

Interface configuration

Command History

Usage Guidelines

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.

Examples

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

ces circuit

To configure the CES connection attributes, use the ces circuit interface configuration command.
To revert to the default setting, use the no form of this command.

ces circuit circuit-id [cas] [cdv max-req] [circuit-name name] [partial-fill num] [shutdown |
imeslots num] [on-hook-detect pattern]

no ces circuit circuit-id [cas] [cdv] [circuit-name name] [partial-fill num] [shutdown]
[timeslots num] [on-hook-detect pattern]

Syntax Description

Defaults

See "Syntax Description."

Command Modes

Interface configuration

Command History

Usage Guidelines

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

Examples

The following example shows setting the structured service CDV range to 5000 milliseconds.

ces dsx1 clock source

To configure a transmit clock source to the T1/E1 CES port adapter, use the ces dsx1 clock source interface configuration command. To revert to the default value, use the no form of this command.

ces dsx1 clock source {loop-timed | network-derived}

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

Syntax Description

Defaults

network-derived

Command Modes

Interface configuration mode

Command History

Examples

The following example shows setting the clock source to loop-timed.

Related Commands

ces dsx1 framing

To select the frame type for the E1 or T1 data line, use the ces dsx1 framing interface configuration command. To restore the default setting, use the no form of this command.

(For E1) ces dsx1 framing {e1_crc_mfCASlt | e1_crc_mflt | e1_lt | e1_mfCAS_lt}

(For T1) ces dsx1 framing {sf | esf}

To restore the default setting, use the no form of these commands.

(For E1) no ces dsx1 framing {e1_crc_mfCASlt | e1_crc_mflt | e1_lt | e1_mfCAS_lt}

(For T1) no ces dsx1 framing {sf | esf}

Syntax Description

Defaults

For E1: el_lt

For T1: esf

Command Modes

Interface configuration

Command History

Usage Guidelines

Use this command in configurations where the switch router communicates with either the T1 or the E1 data line to configure the frame type for your circuit.

Examples

The following example shows setting the E1 data line frame type to e1_mfCAS_lt.

Related Commands

ces dsx1 lbo

To configure T1 port parameters, use the ces dsx1 lbo interface configuration command. To revert to the default setting, use the no form of this command.

ces dsx1 lbo length

no ces dsx1 lbo length

Syntax Description

Defaults

0-110

Command Modes

Interface configuration

Command History

Usage Guidelines

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

Examples

The following example shows setting the cable length to 440 feet using the ces dsx1 lbo interface configuration command.

ces dsx1 linecode

To select the linecode type for the T1 or E1 line, use the ces dsx1 linecode interface configuration command. To restore the default setting, use the no form of this command.

(For E1) ces dsx1 linecode {ami | hdb3}

(For T1) ces dsx1 linecode {ami | b8zs}

To restore the default setting, use the no form of these commands.

(For E1) no ces dsx1 linecode {ami | hdb3}

(For T1) no ces dsx1 linecode {ami | b8zs}

Syntax Description

Defaults

For T1: b8zs

For E1: hdb3

Command Modes

Interface configuration

Command History

Usage Guidelines

The T1 service provider determines which linecode type (ami or b8zs) is required for your circuit.
The E1 service provider determines which linecode type (ami or hdb3) is required for your circuit.

Examples

The following example specifies b8zs as the linecode type for the T1 interface.

ces dsx1 loopback

To configure loopback for the T1 or E1 circuit emulation port adapter module, use the
ces dsx1 loopback interface configuration command. To revert to the default setting, use
the no form of this command.

ces dsx1 loopback {line | noloop | payload}

no ces dsx1 loopback {line | noloop | payload}

Syntax Description

Defaults

noloop

Command Modes

Interface configuration

Command History

Usage Guidelines

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

Examples

The following example shows setting the loopback to payload.

ces dsx1 signalmode robbedbit

To configure the signalmode to robbedbit, use the ces dsx1 signalmode robbedbit interface configuration command. To restore the default setting, 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.

Defaults

Disabled

Command Modes

Interface configuration

Command History

Usage Guidelines

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

In structured mode, you can send the T1 signalling information across the BISDN network. This means that after you set the port in robbedbit signalling mode, 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 BISDN network and reinserts them at the passive side on the CES-IWF connection.

Examples

Related Commands

ces pvc (Hard PVC)

To configure the destination port for the circuit, use the ces pvc (hard PVC) interface configuration command. To disable this feature, use the no form of this command.

ces pvc circuit-id interface atm card/subcard/port [vpi vpi-number] vci vci-number

no ces pvc circuit-id interface atm card/subcard/port [vpi vpi-number] vci vci-number

Syntax Description

Defaults

None.

Command Modes

Interface configuration

Command History

Usage Guidelines

You must configure both sides of the CES circuits because the source (the active side in CES-IWF) 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. See the show ces address command.

Examples

The following example shows how to set a hard PVC on interface ATM 1/0/0.

The following example shows how to set an unstructured CES soft PVC.

The following example shows how to set a structured hard PVC.

Related Commands

ces pvc (Soft PVC)

To configure the destination port for the circuit, use the ces pvc (soft PVC) interface configuration command. To disable this feature, use the no form of this command.

ces pvc circuit-id dest-address atm-address [[vpi vpi-number] vci vci-number] [follow-ifstate] [retry-interval [first retry-interval] [maximum retry-interval]]

no ces pvc circuit-id dest-address atm-address [[vpi vpi-number] vci vci-number] [follow-ifstate] [retry-interval [first retry-interval] [maximum retry-interval]]

Syntax Description

Defaults

None.

Command Modes

Interface configuration

Command History

Usage Guidelines

You must configure both sides of the CES circuits because the source (the active side in CES-IWF) 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. See the show ces address command.

Examples

The following example shows how to set a soft PVC with the follow-ifstate option enabled.