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Table of Contents

Airline Product Set Configuration Commands

Airline Product Set Configuration Commands

Use the commands in this chapter to configure and monitor the Airline Product Set. For Airline Product Set configuration information and examples, refer to the "Configuring the Airline Product Set" chapter in the Bridging and IBM Networking Configuration Guide.

alps a1-map a2-map

Use the alps a1-map a2-map ALPS ASCU submode command to specify the A1 and A2 logical ASCU identification information.

alps a1-map a1-value a2-map a2-value

Syntax Description

a1-value

A1 logical ASCU identification. A hexadecimal number in the range 0x00 to 0x7F, except 0x10, 0x16, and 0x17.

a2-value

A2 logical ASCU identification. A hexadecimal number in the range 0x00, 0x10, 0x16, 0x17, 0x40, 0x50, 0x51, 0x52, and 0x53.

Default

No values are predefined.

Command Mode

ALPS ASCU submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies the A1 identification as 40 and the A2 identification as 20:

alps a1-map 40 a2-map 20

Related Commands

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

show alps ascu

alps ascu

Use the alps ascu interface configuration command to specify a physical ASCU identity. Use the no form of this command to remove the ASCU from the interface and delete any messages queued for transmission to the ASCU or the network.

alps ascu id
no alps ascu id

Syntax Description

id

ASCU interchange address. Valid range is between 41 and 7E, except 43, 44, 47, 50 to 57, 60, 64, and 7B.

Default

No values are predefined.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

If an ASCU already exists on the interface, the alps ascu command initiates the ALPS ASCU submode for that ASCU. If the ASCU does not exist, an ASCU is created and the ALPS ASCU submode is initiated.

Example

The following example specifies the interchange address as 4B:

alps ascu 4B

Related Commands

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

show alps ascu

alps circuit

Use the alps circuit global configuration command to specify an ALPS circuit at the remote CPE across a TCP/IP connection. Use the no form of this command to remove the circuit definition from the configuration, send a close message on the ALPS circuit, and delete any queued messages for the circuit.

alps circuit name
no alps circuit name

Syntax Description

name

Name given to identify an ALPS circuit.

Default

No values are predefined.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Entering this command causes a circuit control block to be created. the command also initiates the ALPS circuit submode. If the circuit already exists, the only action is the initiation of the ALPS circuit submode.

Note that this command is used to statically create an ALPS circuit at the remote CPE. ALPS X.25 circuits (at the central CPE) are always dynamically created and are never created using this command.

Example

The following example specifies the name of the ALPS circuit at the remote CPE as CKT1:

alps circuit CKT1

Related Commands

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

show alps circuits

alps connection-type permanent

Use the alps connection-type permanent ALPS circuit submode command to specify that this circuit should be established when the circuit is enabled.

alps connection-type permanent retry-timer
no alps connection-type permanent retry-timer

Syntax Description

retry-timer

Specifies the maximum interval between consecutive attempts to establish a circuit in the event of a failure. The default for retry-timer is 30  seconds and the range is 1 to 180 seconds.

Default

The default is 30 seconds.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies that the circuit is established when enabled and that the CPE will retry the connection every 30 seconds in the event of a failure:

alps connection-type permanent 30

Related Commands

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

show alps circuits

alps default-ckt

Use the alps default-ckt ALPS ASCU submode command to specify the ALPS circuit that this ASCU uses.

alps default-ckt name

Syntax Description

name

Name given to identify an ALPS circuit on the remote CPE.

Default

No values are predefined.

Command Mode

ALPS ASCU submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies that ALPS circuit to be used is CKT1:

alps default-ckt CKT1

Related Commands

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

show alps circuits

alps enable-alarms ascu

Use the alps enable-alarms ascu global configuration command at the remote CPE to enable alarms for the ALPS ASCUs. Use the no form of this command to disable alarms for the ALPS ASCUs.

alps enable-alarms ascu [interface id]
no alps enable-alarms ascu

Syntax Description

interface id

(Optional) ASCU identifier. Enable alarms for the specified ASCU.

Default

If no interface and interchange address combination is specified, then alarms (SYSLOG messages and SNMP traps) are enabled for all ALPS ASCUs.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

If an interface and interchange address combination is specified, then the alarms are enabled only for the ASCU matching that combination. Up to eight alps enable-alarms ascu commands can be entered to allow a set of ALPS ASCUs to be monitored. ALPS ASCU alarms are only generated at the remote CPE.

Example

The following example enables alarms for ALPS ASCU 42 on serial interface 1:

alps enable-alarms ascu Serial1 42

Related Commands

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

show alps ascu

alps enable-alarms circuit

Use the alps enable-alarms circuit global configuration command to enable alarms for the ALPS circuits. Use the no form of this command to remove the circuit definition from the configuration.

alps enable-alarms circuit name
no alps enable-alarms circuit name

Syntax Description

name

Name given to identify an ALPS circuit on the remote CPE.

Default

No values are predefined.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

If a valid circuit name is specified, then the alarms are enabled only for the circuit matching the name. Up to eight alps enable-alarms circuit commands can be entered to allow a subset of ALPS circuits to be monitored. ALPS circuit alarms are generated at both the remote (ALC) CPE and the central (X.25) CPE.

Example

The following example enables alarms for the ALPS circuit named CKT1:

alps enable alarms circuit CKT1

Related Commands

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

show alps circuits

alps enable-alarms peer

Use the alps enable-alarms peer global configuration command to enable alarms for the ALPS peers. Use the no form of this command to remove the circuit definition from the configuration, send a close message on the ALPS circuit, and delete any queued messages for the circuit.

alps enable-alarms peer ip-address
no alps enable-alarms peer ip-address

Syntax Description

ip-address

IP address of the remote peer for which alarms are enabled.

Default

No values are predefined.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

If an IP address is specified, then the alarms are enabled only for the remote peer matching the IP address. Up to eight alps enable-alarms peer commands can be entered to allow a set of ALPS peers to be monitored. ALPS peer alarms are generated at both the remote and the central CPE.

Example

The following example enables alarms for the ALPS peer at IP address 172.22.0.91:

alps enable alarms peer 172.22.0.91

Related Commands

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

show alps peers

alps enable-ascu

Use the alps enable-ascu ALPS ASCU submode command to move the previously defined ASCU from the inactive poll list to the active poll list. This move results in the protocol handler polling the ASCU and rendering it ready for handling terminal traffic. Use the no form of this command to remove the ASCU from the active poll list to the inactive poll list. This action prevents the ASCU from being polled, rendering it not ready for handling terminal traffic.

alps enable-ascu
no alps enable-ascu

Syntax Description

This command has no arguments or keywords.

Default

No values are predefined.

Command Mode

ALPS ASCU submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example moves the ASCU to the active poll list:

alps enable-ascu

Related Commands

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

show alps ascu

alps enable-circuit

Use the alps enable-circuit ALPS circuit submode command to enable the circuit to be activated when data is received from an ASCU. Use the no form of this command to disable the circuit.

alps enable-circuit
no alps enable-circuit

Syntax Description

This command has no arguments or keywords.

Default

The circuit is disabled by default.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies the circuit to be activated when data is received from an ASCU:

alps enable-circuit

Related Commands

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

show alps circuits

alps error-display

Use the alps error-display ALPS ASCU submode command to specify where error messages about service availability or network problems are displayed. Use the no form of this command to return to the default values.

alps error-display number1 number2
no alps error-display number1 number2

Syntax Description

number1

For ALC, specifies the terminal address where these service messages are to be sent. Valid numbers are hexadecimal numbers in the range 0x40 to 0x7F. The default address is 0x72.

number2

For ALC, specifies the screen line number where service messages are to be displayed. Valid numbers are hexadecimal numbers in the range 0x40 to 0x7F. The default screen line number is 0x66.

Defaults

The default terminal address for ALC is 0x72.

The default screen line for ALC is 0x20.

Command Mode

ALPS ASCU submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies that error messages are displayed at terminal address 6d, on screen line number 78:

alps error-display 6d 78

Related Commands

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

show alps ascu

alps host-hld host-link

Use the alps host-hld host-link interface configuration command to enable ALPS on the X.25 interface. Use the no form of this command to disable ALPS on the X.25 interface.

alps host-hld hld host-link num {{ax25 [damp-tmr value]} | {emtox x.121}} [life-tmr value]
no alps host-hld hld host-link num {{ax25 [damp-tmr value]} | {emtox x.121}} [life-tmr  value]

Syntax Description

hld

Host high-level designator. A hexadecimal number in the range
101 to 7f7f.

num

Host-link identifier. A number in the range 1 to 255.

ax25

Specifies airline X.25 implementation of X.25.

damp-tmr value

(Optional) Specifies the AX.25 PVC damping timer. The value argument is the length of time that a PVC can be inactive before it is destroyed and the corresponding ALPS circuits are closed. The default is 10 seconds.

emtox

Specifies EMTOX implementation of X.25.

x.121

X.121 address of the EMTOX host (called address on calls to the EMTOX host).

life-tmr value

Specifies the maximum amount of time (in seconds) that a message may be queued for transmission to the host X.25 system before it is discarded. The value argument is time (in seconds).

Default

The default damping timer value is 10 seconds.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example enables ALPS on an X.25 interface, using the airline X.25 implementation:

alps host-hld 4B10 host-link 3 ax25

Related Commands

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

encapsulation x25

alps hostlink

Use the alps hostlink ALPS circuit submode command to specify information required to establish an X.25 virtual circuit at the central CPE. Use the no form of this command to remove the circuit definition from the configuration, send a close message on the ALPS circuit, and delete any queued messages for the circuit.

alps hostlink number {ax25 lcn | emtox x121-addr} [winout val1] [winin val2] [ops val3]
[ips val4]
no alps hostlink number {ax25 lcn | emtox x121-addr} [winout val1] [winin val2] [ops val3]
[ips val4]

Syntax Description

number

Interface at the host CPE. Decimal number in the range 1 to 255.

ax25

Specifies airline X.25 implementation of X.25.

lcn

Local channel number for AX.25 connections.

emtox

Specifies EMTOX implementation of X.25.

x121-addr

X.121 address for EMTOX connections.This is the X.121 calling address for X.25 call packets sent from the central CPE to the EMTOX host.

winout val1

(Optional) Specifies the X.25 transmit window The val1 argument is a decimal number in the range 1 to 7.

winin val2

(Optional) Specifies the X.25 receive window. The val2 argument is a decimal number in the range 1 to 7.

ops val3

(Optional) Specifies the maximum output packet size. The val3 argument is one of the following numbers: 128, 240, 256, 512, 1024, 2048, or 4096.

ips val4

(Optional) Specifies the maximum input packet size. The val4 argument is one of the following numbers: 128, 240, 256, 512, 1024, 2048, or 4096.

Default

If no values are specified, the default values at the X.25-attached central CPE are used.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example establishes an X.25 virtual circuit at the central CPE. The configuration specifies airline X.25 implementation. The host CPE interface is 3, the local channel number for airline X.25 connections is 120, and the X.25 transmit window is 3.

alps hostlink 3 ax25 120 winout 3 winin 3

Related Commands

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

alps circuit
show alps circuits

alps idle-timer

Use the alps idle-timer ALPS circuit submode command to specify (for dynamic circuits) the length of time that can elapse before an idle circuit is disabled. Use the no form of this command to return to the default idle-timer value.

alps idle-timer timer
no alps idle-timer timer

Syntax Description

timer

Length of time that can elapse before an idle circuit is brought down. The range is 10 to 600 seconds. The default is 60 seconds.

Default

The default length of time that can elapse before an idle circuit is brought down is 60 seconds.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies that an idle circuit is maintained for 90 seconds before it is disabled:

alps idle-timer 90

Related Commands

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

alps circuit
show alps circuits

alps keepalive

Use the alps keepalive global configuration command to enable TCP keepalives for ALPS TCP peer connections. A TCP keepalive request will be sent to the remote peer if the TCP connection to the remote peer is silent for a time period larger than the interval specified. The TCP connection to the ALPS host will be closed when a count equal to the retry count specified is missed consecutively. Use the no form of this command to disable keepalives for ALPS.

alps keepalive [interval time] [retry count]
no alps keepalive [interval time] [retry count]

Syntax Description

interval time

(Optional) Interval for keepalive requests. The time argument is the keepalive interval, in the range of 10 to 300 seconds. The default is 30  seconds.

retry count

(Optional) Indicates how many times keepalive requests will be sent before the connection is closed. The count argument is the retry count, in the range 1 to 10. The default is 3 retries.

Default

The default keepalive interval is 30 seconds.

The default retry count is 3.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies that a TCP keepalive request will be sent to the remote peer if the TCP peer connection is idle for 60 seconds. The connection will be closed after 3 consecutive keepalive requests are sent.

alps keepalive interval 60 retry 8

Related Commands

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

alps local-peer

alps lifetime-timer

Use the alps lifetime-timer ALPS circuit submode command to specify the maximum amount of time messages can be queued in the ALPS circuit queue awaiting transmission to the central CPE. Use the no form of this command to return to the default lifetime-timer value.

alps lifetime-timer timer
no alps lifetime-timer timer

Syntax Description

timer

Length of time, in seconds, that a message can be queued. The range is 1 to 20 seconds. The default is 4 seconds.

Default

The default length of time that a message can be queued in the ALPS circuit queue is 4 seconds.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Messages that exceed the timer limit are discarded.

Example

The following example specifies that a message remains in the ALPS circuit queue for no longer than 3 seconds:

alps lifetime-timer 3

Related Commands

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

alps circuit
show alps circuits

alps local-hld remote-hld

Use the alps local-hld remote-hld ALPS circuit submode command to specify the local and remote HLDs (in hexadecimal) to use for this ALPS circuit. Use the no form of this command to remove the definition from the configuration.

alps local-hld loc-hld remote-hld rem-hld
no alps local-hld loc-hld remote-hld rem-hld

Syntax Description

loc-hld

Local HLD to use for ALPS circuit. Hexadecimal number in the range 0x0101 to 0x7F7F.

rem-hld

Remote HLD to use for ALPS circuit. Hexadecimal number in the range 0x0101 to 0x7F7F.

Default

No values are predefined.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies the local HLD as 4b10 and the remote HLD as 5c00:

alps local-hld 4B10 remote-hld 5c00

Related Commands

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

alps circuit
show alps circuits

alps local-peer

Use the alps local-peer global configuration command to specify the IP address of the local peer. Use the no form of this command to remove all subsequent ALPS configuration commands from the router.

alps local-peer ip-address [promiscuous]
no alps local-peer ip-address [promiscuous]

Syntax Description

ip-address

IP address of the local peer.

promiscuous

(Optional) Keyword specified at the central CPE to accept incoming TCP connections from any remote CPE.

Default

No values are predefined.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies the local peer IP address as 172.22.0.91 and specifies that the CPE accepts incoming TCP connections from any CPE:

alps local-peer 172.22.0.91 promiscuous

Related Commands

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

show alps peers

alps max-msg-length

Use the alps max-msg-length ALPS ASCU submode command to specify maximum input message length. Use the no form of this command to return to the default maximum input message length.

alps max-msg-length value
no alps max-msg-length value

Syntax Description

value

Maximum input message length. The range is 1 to 3840. The default is  962 characters.

Default

The default maximum input message length is 962 characters.

Command Mode

ALPS ASCU submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies that the maximum length of a message is 1000 characters:

alps max-msg-length 1000

alps mpx

Use the alps mpx ALPS circuit submode command to specify the multiplexing and the ASCU identification header for this circuit. Use the no form of this command to remove the definition from the configuration.

alps mpx {group | single} hdr {a1a2 | none}
no alps mpx {group | single} hdr {a1a2 | none}

Syntax Description

group

Specifies that multiple ASCUs will be multiplexed on the ALPS circuit.

single

Specifies that only one ASCU will use this circuit.

hdr

Specifies the ASCU identification header for the circuit.

a1a2

ASCU identification via A1, A2.

none

No ASCU identification.

Default

The default for multiplexing is group.

The default header is a1a2.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

If alps mpx group is specified, multiple ASCUs will be multiplexed on this ALPS circuit. If alps  mpx single is specified, then only one ASCU uses this ALPS circuit. If alps mpx single hdr none is specified, the A1 and A2 ASCU identification information is not added to the front of data frames sent across this circuit, and it is assumed that it does not exist in frames received on this circuit. The exclusion of ASCU identification should only be specified when the EMTOX protocol is used.


alps n1

Use the alps n1 interface configuration command to specify the threshold of consecutive errors logged before an ASCU is declared down. Use the no form of this command to reassert the default number of consecutive errors before declaring an ASCU down.

alps n1 errors
no alps n1 errors

Syntax Description

errors

Error count limit. The valid range is 1 to 30 errors. The default is 30  errors.

Default

The default error count is 30 errors.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

The error count limit is a threshold value. If the ASCU state is UP and the error count threshold is exceeded, the ASCU state changes to DOWN and it is moved to the inactive poll. If alarms are enabled for the ASCU, a SYSLOG message is displayed and an SNMP notification is sent to the SNMP network management station.

Example

The following example specifies that an ASCU is declared down when the error count exceeds 1:

alps n1 1

Related Commands

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

alps ascu
show alps ascu

alps n2

Use the alps n2 interface configuration command to specify the number of polls that must be correctly replied to before an ASCU is declared up. Use the no form of this command to reassert the default number of polls that must be correctly replied before an ASCU is declared up.

alps n2 polls
no alps n2 polls

Syntax Description

polls

Number of polls that must be correctly replied to. The valid range is 1  to  30 polls. The default is 30 polls.

Default

The default number of polls that must be correctly replied to is 30.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

If the ASCU state is DOWN and the reply threshold is exceeded, the ASCU state changes to UP and the ASCU is moved to the active poll list. If alarms are enabled for the ASCU, a SYSLOG message is displayed and an SNMP notification is sent to the SNMP management station.

Example

The following example specifies that 2 polls must be correctly replied to before the ASCU is declared up:

alps n2 2

Related Commands

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

alps ascu
show alps ascu

alps poll-pause

Use the alps poll-pause interface configuration command to specify the minimum interval, in milliseconds, between initiations of the polling cycle. Use the no form of this command to revert to the default interval.

alps poll-pause msec
no alps poll-pause

Syntax Description

msec

Minimum interval between polls, in microseconds.The valid range is 10  to  1000 microseconds. The default interval is 50 microseconds.

Default

The default minimum interval is 50 microseconds.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example sets a 200-microsecond minimum interval between polls.

alps poll-pause 200

Related Commands

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

alps ascu

alps primary-peer

Use the alps primary-peer ALPS circuit submode command to specify the primary TCP peer and, optionally, a backup TCP peer for this ALPS circuit. Use the no form of this command to remove the definition from the configuration.

alps primary-peer ip-addr [backup-peer ip-addr]
no alps primary-peer ip-addr [backup-peer ip-addr]

Syntax Description

ip-addr

IP address specified in the alps remote-peer command.

backup-peer

(Optional) Backup TCP peer for the ALPS circuit.

ip-addr

IP address specified in the alps remote-peer command.

Default

No values are predefined.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies a primary peer at IP address 172.22.0.91 and a backup peer at IP address 172.22.0.92:

alps primary-peer 172.22.0.91 backup-peer 172.22.0.92

Related Commands

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

alps circuit
show alps peers

alps remote-peer

Use the alps remote-peer global configuration command to specify the IP address of a peer connection to the partner CPE. Use the no form of this command to remove the definition from the configuration.

alps remote-peer ip-addr [dynamic [inact-timer]] [tcp-qlen [num]]
no alps remote-peer ip-addr [dynamic [inact-timer]] [tcp-qlen [num]]

Syntax Description

ip-addr

IP address of the peer.

dynamic

(Optional) Allows the TCP connection to the host peer to be opened only when there is data to be transferred to the host reservation system.

inact-timer

(Optional) Length of inactivity, in seconds, after which the connection is closed. The range is 10 to 300 seconds. The default is 60 seconds.

tcp-qlen

(Optional) Specifies a default number of packets in the queue.

num

(Optional) Number of packets allowed in the queue. The range is 26  to  100  packets. The default is 50 packets.

Default

The default is length of inactivity is 60 seconds.

The default number of packets is 50.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Issuing the no alps remote-peer command causes the following to occur:

Example

The following example specifies a peer connection at IP address 172.22.0.92 and allows the TCP connection to be opened only when there is data to be transferred:

alps remote-peer 172.22.0.92 dynamic 60

Related Commands

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

alps local-peer
show alps peers

alps retry-option

Use the alps retry-option ALPS ASCU submode command to configure the CPE to transmit a message to the ASCU when a message with a bad cycle check character (CCC) is received from an ASCU. Use the no form of this command to reassert the default action of no retry.

alps retry-option {resend | reenter}
no alps retry-option

Syntax Description

resend

Specify the retry option as resend. This option causes an indicator LED to signal the operator at the ASCU to resend data.

reenter

Specify the retry option as reenter. This option causes a service message to signal the operator at the ASCU to reenter data.

Default

The default retry option is no retry.

Command Mode

ALPS ASCU submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies that an indicator LED signals the ASCU to resend data:

alps retry-option resend

Related Commands

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

alps ascu
show alps ascu

alps service-msg-interval

Use the alps service-msg-interval ALPS circuit submode command to specify the interval between transmission of a service message to an ASCU and transmission of a "PLEASE RETRY" message. Use the no form of this command to remove the definition from the configuration.

alps service-msg-interval seconds
no alps service-msg-interval seconds

Syntax Description

seconds

Interval, in seconds, between consecutive transmissions of service messages from the remote CPE to the ASCU. The range is 1  to  20  seconds. The default interval is 4 seconds.

Default

The default interval between consecutive transmissions of service messages from the remote CPE to the ASCU is 4 seconds.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

The "PLEASE RETRY" message is transmitted only to ASCUs that use circuits with a dynamic connection type.

Example

The following example specifies an interval of 3 seconds between transmission of service messages from the CPE to the ASCU:

alps service-msg-interval 3

Related Commands

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

alps circuit
alps service-msg-list

alps service-msg-list

Use the alps service-msg-list ALPS circuit submode command to define the service message list to be used for this circuit. Use the no form of this command to remove the list from the circuit configuration, thus issuing no service messages until another list is configured.

alps service-msg-list list
no alps service-msg-list list

Syntax Description

list

The service message list to be used for this circuit. The valid numbers are 1 to 8.

Default

No values are predefined.

Command Mode

ALPS circuit submode

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies that message list 1 is used for this circuit:

alps service-msg-list 1

Related Commands

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

alps circuit
alps service-msg-interval

alps service-msg-list number

Use the alps service-msg-list number global configuration command to define the service message identity and its contents for a service message list. Use the no form of this command to remove a service message number from the service message list configuration.

alps service-msg-list list number number msg
no alps service-msg-list list number number msg

Syntax Description

list

The service message list to be used for this circuit. The valid numbers are 1 to 8

number

Specify a list number.

number

List number. Valid numbers are 1 to 8.

msg

Contents of a service message.

Default

The default service message is used if no service message list number is specified.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies the text of message list 1, message number 2:

alps service-msg-list 1 number 2 "Turn off the terminal NOW."

alps servlim

Use the alps servlim interface configuration command to specify the number of cycles of the active poll list to execute before polling the next ASCU on the inactive poll list. Use the no form of this command to reassert the default number of cycles through the normal (active) poll list allowed before the slow poll list is processed.

alps servlim polls
no alps servlim polls

Syntax Description

polls

Number of polls of the ASCU UP list. The valid range is 1  to  30 polls. The default is 30 polls.

Default

The default number of polls of the ASCU UP list allowed between two successive polls of the ASCU DOWN list is 30 polls.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies that 5 polls of the ASCU UP list are allowed between 2 successive polls of the ASCU DOWN list.

alps servlim 5

Related Commands

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

alps n1
alps n2
alps t1
alps t2

alps t1

Use the alps t1 interface configuration command to specify the timeout delay between polling and response. Use the no form of this command to reassert the default poll timeout value of 0.5 seconds.

alps t1 delay
no alps t1 delay

Syntax Description

delay

Timeout delay, in seconds, between polling and response. The valid range is 1 to 10 tenths of a second (.1 to 1 second). The default is 5  tenths of a second (.5 second).

Default

The default timeout delay between polling and response is 5 tenths of a second (.5 second).

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies a .5-second time-out delay between polling and response:

alps t1 5

Related Commands

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

alps n1
alps n2
alps servlim
alps t2

alps t2

Use the alps t2 interface configuration command to specify the timeout delay between receipt of the first character of an I/P sequence solicited by a poll and receipt of a Go Ahead (GA) sequence. Use the no form of this command to reassert the default timeout value of 6 seconds.

alps t2 delay
no alps t2 delay

Syntax Description

delay

Timeout delay, in seconds, between receipt of first character of an I/P sequence solicited by a poll and receipt of Go Ahead (GA) sequence. The valid range is 1 to 10 seconds. The default is 6 seconds.

Default

The default timeout delay between receipt of first character of an I/P sequence solicited by a poll and receipt of Go Ahead (GA) sequence is 6 seconds.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example specifies a timeout delay of 8 seconds between receipt of the first character of an I/P sequence solicited by a poll and receipt of a Go Ahead sequence:

alps t2 8

Related Commands

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

alps n1
alps n2
alps servlim
alps t1

alps translate

Use the alps translate interface configuration command to map an X.121 address to an IP address of a remote peer. Use the no form of this command to remove mapping from the configuration.

alps translate x.121-addr ip-addr
no alps translate x.121-addr ip-addr

Syntax Description

x.121-addr

X.121 address to be mapped to an IP address of a remote peer.

ip-addr

IP address of the remote peer.

Default

No values are predefined.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

The X.121 address is compared to the Called Address on inbound X.25 call packets to determine if the call should be accepted. The X.121 address may have an asterisk (*) at the end to indicate "all X.121 addresses prefixed with the address before the *".

Example

The following example maps all X.121 addresses prefixed with the address 88845 to the remote peer IP address 172.22.0.90:

alps translate 88845* 172.22.0.90

Related Commands

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

encapsulation x25

clear alps circuits

Use the clear alps circuits EXEC command to remove configured ALPS circuits.

clear alps circuits [ipaddr address | name string]

Syntax Description

ipaddr address

(Optional) Clear ALPS circuits for peer with specified IP address.

name string

(Optional) Clear ALPS circuits for peer with specified name.

Default

If no IP address or name is specified, the command clears all ALPS circuits.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example clears the ALPS circuit named CKT1:

clear alps circuits name CKT1

Related Commands

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

alps circuit
show alps circuits

clear alps counters

Use the clear alps counters EXEC command to clear all counters relevant to the ALPS feature.

clear alps counters

Syntax Description

This command has no arguments or keywords.

Default

No values are predefined.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Example

The following example clears all counters for the ALPS feature:

clear alps counters

Related Commands

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

show alps ascu
show alps circuits
show alps peers

encapsulation alc

Use the encapsulation alc interface configuration command to specify that the ALC protocol will be used on the serial interface. Use the no form of this command to remove ALC protocol handling from the serial interface, and return the default encapsulation (HDLC) to the interface.

encapsulation alc
no encapsulation alc

Syntax Description

This command has no arguments or keywords.

Default

No values are predefined.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

The encapsulation alc command causes any ASCU configuration to be removed from the interface. As each ASCU defined on the interface is removed it is also unlinked from the ASCU circuit it belongs to. All data frames queued for transmission to the ASCU are destroyed.

This encapsulation command must be entered prior to any ASCU configuration. Note that all timer and counter values are applicable to all ASCUs on the interface.

Example

The following example specifies that the ALC protocol is used:

encapsulation alc

Related Commands

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

show interfaces

show alps ascu

Use the show alps ascu EXEC command to display the status of the ALPS ASCU.

show alps ascu [interface id] [detail]

Syntax Description

interface id

(Optional) Combined interface and interchange address. If specified, only the status of that ASCU is displayed.

detail

(Optional) Long display of output.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Sample Displays

The following is sample output from the show alps ascu command:

Router# show alps ascu 
interface        dlc          ia        a1          a2          circuit            pkt_tx          pkt_rx        state
--------------------------------------------------------------------------------------
Serial6            ALC          42        24          49          AX_CKT              105                105              UP
Serial6            ALC          46        46          52          EM_CKT              0                        0              UP

The following is sample output from the show alps ascu detail command:

Router# show alps ascu detail 
ascu 42 on i/f Serial6, dlc = ALC, state = UP
          default-circuit = AX_CKT, a1 = 24, a2 = 49
          retry_option = resend, max_msg_len = 962
          err_disp_terminal = 0, err_disp_line = 0
          pkt_tx = 105, byte_tx = 1050, pkt_rx = 105, byte_rx = 1050
ascu 46 on i/f Serial6, dlc = ALC, state = UP
          default-circuit = EM_CKT, a1 = 46, a2 = 52
          retry_option = reenter, max_msg_len = 962
          err_disp_terminal = 0, err_disp_line = 0
          pkt_tx = 0, byte_tx = 0, pkt_rx = 0, byte_rx = 0

Related Commands

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

alps ascu

show alps circuits

Use the show alps circuits EXEC command to display the status of the ALPS circuits. If a circuit name is specified, than only the status of that circuit will be displayed; otherwise, the status of all circuits will be displayed.

show alps circuits [name name] [detail]

Syntax Description

name name

(Optional) If specified, only the status of that circuit is displayed.

detail

(Optional) Long display of output.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Sample Displays

The following is sample output from the show alps circuits command:

Router# show alps circuits
name                pri_peer                curr_peer           dlc              state      pkt_tx      pkt_rx
---------------------------------------------------------------------------------
AX_CKT        172.18.3.141        172.18.3.141        AX25              OPEN          57                57
EM_CKT        172.18.3.141        172.18.3.141        EMTOX            OPEN            0                  0

The following is sample output from the show alps circuits detail command:

Router# show alps circuits detail 
AX_CKT: dlc = AX25, peer = 172.18.3.141, state = OPEN, uptime = 00:00:00
          i/f = Serial2, host_link = 1, host_hld = 700, remote_hld = 145
          lcn = 33, nonstd_240 = TRUE
          damping_tmr = 10, lifetime_tmr = 4
          pkt_tx = 57, byte_tx = 1311, pkt_rx = 57, byte_rx = 1311
          src_corr = 5063224, dst_corr = 88D990
          drops_q_overflow = 0, drops_lifetime_exceeded = 0, drops_vc_reset = 0
          ascus: (24,49),
 
EM_CKT: dlc = EMTOX, peer = 172.18.3.141, state = OPEN, uptime = 00:00:00
          i/f = Serial3, host_link = 3, host_hld = 1200, remote_hld = 145
          lcn = 1, host_x121 = 22233, remote_x121 = 44005
          damping_tmr = 0, lifetime_tmr = 4
          pkt_tx = 0, byte_tx = 0, pkt_rx = 0, byte_rx = 0
          src_corr = 502F220, dst_corr = 88DBF8
          drops_q_overflow = 0, drops_lifetime_exceeded = 0, drops_vc_reset = 0
          ascus: (46,52),

The following is sample output from the show alps circuits command:

Router# show alps circuits
name                pri_peer                curr_peer           dlc              state      pkt_tx      pkt_rx
---------------------------------------------------------------------------------
AX_CKT      172.18.3.27            172.18.3.27            ALC              OPEN          105              105
EM_CKT      172.18.3.27            172.18.3.27            ALC              OPEN              0                  0

The following is sample output from the show alps circuits detail command:

Router# show alps circuits detail
AX_CKT: dlc = ALC, conn_type = DYN, state = OPEN, uptime = 00:00:00
          pri_peer = 172.18.3.27, sec_peer = 0.0.0.0, curr_peer = 172.18.3.27
          local_hld = 145, remote_hld = 700
          ax25:  hostlink = 1, lcn = 33 
          lifetime_tmr = 4, idle_tmr = 60, retry_tmr = 0
          pkt_tx = 105, byte_tx = 2415, pkt_rx = 105, byte_rx = 2415
          src_corr = 9A1760, dst_corr = 50333C8
          drops_q_overflow = 0, drops_ckt_disabled = 0
          drops_lifetime_tmr = 0, drops_invalid_ascu = 0
          ascus:  (24,49),
 
EM_CKT: dlc = ALC, conn_type = PERM, state = OPEN, uptime = 00:00:00
          pri_peer = 172.18.3.27, sec_peer = 0.0.0.0, curr_peer = 172.18.3.27
          local_hld = 145, remote_hld = 1200
          emtox: hostlink = 3, x121 = 44005 
          lifetime_tmr = 4, idle_tmr = 60, retry_tmr = 10
          pkt_tx = 0, byte_tx = 0, pkt_rx = 0, byte_rx = 0
          src_corr = 9A18D4, dst_corr = 8FB520
          drops_q_overflow = 0, drops_ckt_disabled = 0
          drops_lifetime_tmr = 0, drops_invalid_ascu = 0
          ascus:  (46,52),

Related Commands

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

alps circuit

show alps peers

Use the show alps peers EXEC command to display the status of the ALPS remote peers. If an IP address is specified, than only the status of that peer will be displayed; otherwise, the status of all peers will be displayed.

show alps peers [ipaddress addr] [detail]

Syntax Description

ipaddress addr

If specified, only the status of that circuit is displayed.

detail

(Optional) Long display of output.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3T.

Sample Displays

The following is sample output from the show alps peers command:

Router# show alps peers 
local_peer : ip_address = 172.18.3.141
ip_address          type          create            state            pkt_tx          pkt_rx        
--------------------------------------------------------------------------------------
172.18.3.27        PERM            LEARN            OPENED                1                    1            

The following is sample output from the show alps peers detail command:

Router # show alps peers detail 
local_peer : ip_address = 172.18.3.141
TCP: 172.18.3.27, type = PERM, create = ADMIN, state = OPENED, uptime = 00:08:21
        pkt_tx = 0, byte_tx = 0, pkt_rx = 0, byte_rx = 0
        drops_giants = 0, drops_q_overflow = 0, drops_peer_down = 0, drops_ver_mismatch = 0
        active_ckts: CKT1, CKT2

Related Commands

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

alps primary-peer
alps remote-peer

show interfaces

Use the show interfaces EXEC command to display ALC information.

show interface type number

Syntax Description

type

Interface type.

number

Port number.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

Sample Display

The following output shows ALC information for the serial 2 interface.

Router# show interface s2
Serial2 is up, line protocol is up
Hardware is CD2430
MTU 1500 bytes, BW 115 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation ALC, loopback not set
Full-duplex enabled.
          ascus in UP state: 42, 46
          ascus in DOWN state: 
          ascus DISABLED: 
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 output buffer failures, 0 output buffers swapped out
DCD=down  DSR=down  DTR=down  RTS=down  CTS=down


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