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X.25 on ISDN Commands

X.25 on ISDN Commands

This chapter describes the commands specific to configuring X.25 on an ISDN BRI D channel.

For ISDN BRI commands, see the "ISDN Basic Rate Service Setup Commands" chapter in this manual. For the X.25 commands used to complete the configuration, see the "X.25 and LAPB Commands" chapter in the Wide-Area Networking Command Reference.

For information about the configuration tasks, see the "Configuring X.25 on ISDN" chapter of the Dial Solutions Configuration Guide.

interface bri

To configure a Basic Rate Interface (BRI) interface and enter interface configuration mode, use the interface bri global configuration command.

interface bri number
interface bri slot/port (Cisco 7500 series)

To configure a BRI subinterface only, use the following form of the interface bri global configuration command:

interface bri number.subinterface-number [multipoint | point-to-point]
interface bri slot/port.subinterface-number [multipoint | point-to-point] (Cisco 7500 series)

To specify the BRI interface that is created by enabling X.25 on a specified ISDN BRI interface, use the interface bri command with a subinterface 0 specification:

interface bri number:0

interface bri
slot/port:0 (Cisco 7200 series)

Syntax Description

number

Port, connector, or interface card 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.

slot/port

On the Cisco 7200 series, slot location and port number of the interface.

.subinterface-number

Subinterface number in the range 1 to 4294967293. The number that precedes the period (.) must match the number this subinterface belongs to.

multipoint | point-to-point

(Optional) Specifies a multipoint or point-to-point subinterface. The default is multipoint.

:0

The subinterface created by applying the isdn x25 static-tei and the isdn x25 dchannel commands to the specified BRI interface. This interface must be configured for X.25.

Default

The default mode for subinterfaces is multipoint.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3. The capability to carry X.25 traffic on the D channel was added in Cisco IOS Release 11.2 F.

This command was modified in Cisco IOS Release 11.2 P to include slot/port syntax for the PA-8B-ST and PA-4B-U port adapters on Cisco 7200 series routers.

Subinterfaces can be configured to support partially meshed Frame Relay networks. (Refer to the "Configuring Frame Relay" chapter in the Wide-Area Networking Configuration Guide.)

Example

The following example creates a BRI 0:0 interface for X.25 traffic over the D channel and then configures the new interface to carry X.25 traffic:

interface bri0
 isdn x25 dchannel
 isdn x25 static-tei 8
!
interface bri0:0
 ip address 10.1.1.2 255.255.255.0
 x25 address 31107000000100
 x25 htc 1
 x25 suppress-calling-address
 x25 facility windowsize 2 2
 x25 facility packetsize 256 256
 x25 facility throughput 9600 9600
 x25 map ip 10.1.1.3 31107000000200

Related Commands

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

dialer map
dialer-group
encapsulation ppp
isdn spid1
isdn spid2
ppp authentication chap
ppp authentication pap
show interfaces bri

isdn x25 dchannel

To create a configurable interface for X.25 traffic over the ISDN D channel, use the isdn x25 dchannel interface configuration command. To remove the interface, use the no form of this command.

isdn x25 dchannel
no isdn x25 dchannel

Syntax Description

This command has no arguments or keywords.

Default

Disabled

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2 F.

This command creates a new, configurable interface, which can be specified as interface brix:0 in commands, where x is the original BRI interface number.

For example, on a Cisco 4500 router with an MBRI, if the isdn x25 dchannel command is configured on bri5, the new interface is bri5:0 and can be used for configuring the other parameters for X.25 over the D channel. These parameters include the addresses, the map statements, and others.

To display the new interface, use the more system:running-config command.

Example

The following example creates interface bri 1:0 and configures it for X.25 over the ISDN D channel. This example uses dynamic TEIs, not a static TEI.

interface bri1
 isdn x25 dchannel
!
interface bri1:0
 ip address 10.1.1.2 255.255.255.0
 x25 address 31107000000100
 x25 htc 1
 x25 suppress-calling-address
 x25 facility windowsize 2 2
 x25 facility packetsize 256 256
 x25 facility throughput 9600 9600
 x25 map ip 10.1.1.3 31107000000200
 x25 map ip 10.1.1.4 31107000000800

Related Commands

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

interface bri

isdn x25 static-tei

To configure a static ISDN Layer 2 terminal endpoint identifier (TEI) for X.25 over the ISDN D channel, use the isdn x25 static-tei interface configuration command. Use the no form of this command if dynamic TEIs will be used on the interface that is to carry X.25 traffic over the D  channel.

isdn x25 static-tei tei-number

Syntax Description

tei-number

Terminal endpoint identifier, in the range 0 to 63.

Default

Disabled

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 11.2 F.

This command applies to ISDN BRI interfaces only. Only one static TEI is allowed per BRI interface. If a second static TEI is configured, the first static TEI is overwritten.

Some switches require a static TEI be used for X.25 over the ISDN D channel.

When the isdn x25 dchannel command is invoked without the isdn x25 static-tei command, a dynamic TEI is chosen.

Examples

The following example creates static TEI 8 on the X.25-over-ISDN-D channel:

interface bri0
isdn x25 dchannel
isdn x25 static-tei 8

Because the isdn x25 static-tei command is missing, the following example configuration sets dynamic TEIs for the ISDN channel:

interface bri0
isdn x25 dchannel

Related Commands

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

interface bri
isdn x25 dchannel


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