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Determining ATM Interface Type

 

Checklist for Determining ATM Interface Type

Purpose

To determine the type of Asynchronous Transfer Mode (ATM) interface on your router.

Action

Table 1 provides the links and commands for determining the type of ATM interface on your router.

Table 1: Checklist for Determining ATM Interface Type

Tasks

Command or Action

Determining the ATM Interface Type and Configuration 
  1. Determining the ATM Interface Type

show chassis hardware

Note: For ATM1 and ATM2 interfaces.

  1. Identifying the ATM Interface Type

show chassis hardware

Note: For ATM MIC interfaces.

  1. Verifying the ATM Configuration

 

show configuration interfaces at-fpc/pic/port

show configuration interfaces at-fpc/pic/port

show configuration interfaces at-fpc/pic/port

Examples of Incorrect Configurations of ATM Options 
  1. Verifying the Configuration of the VCI on an ATM1 Interface

show configuration interfaces at-fpc/pic/port

show interfaces terse at-fpc/pic/port

edit

edit interfaces interface-name atm-options vpi vpi-identifier maximum-vcs maximum-vcs

show

commit

show configuration interfaces at-fpc/pic/port

run show interfaces terse at-fpc/pic/port

  1. Verifying the Configuration of the VCI on an ATM2 IQ Interface

show configuration interfaces at-fpc/pic/port

show interfaces terse at-fpc/pic/port

edit

edit interfaces interface-name atm-options vpi vpi-identifier delete maximum-vcs

show

commit

show configuration interfaces at-fpc/pic/port

run show interfaces terse at-fpc/pic/port

  1. Verifying the Configuration of Promiscuous Mode on an ATM2 IQ Interface

show configuration interfaces at-fpc/pic/port

show interfaces terse at-fpc/pic/port

edit

set interfaces interface-name atm-options pic-type atm 2

show

commit

show configuration interfaces at-fpc/pic/port

run show interfaces terse at-fpc/pic/port

Determining the ATM Interface Type and Configuration

Purpose

When you know the type of ATM interface on your router, you can configure it with the correct configuration options.

For ATM1, ATM2 intelligent queuing (IQ) interfaces, and ATM MIC interfaces, the Junos OS does not determine from the interface name at-fpc/pic/port whether your routing platform has an ATM1, ATM2 IQ Physical Interface Card (PIC), or ATM Modular Interface Card (MIC) installed.

Action

To determine the type of ATM interface on your router and to check your ATM interface configuration, follow these steps:

  1. Determining the ATM Interface Type

  2. Verifying the ATM Configuration

Determining the ATM Interface Type

Purpose

To determine the type of ATM interface on your router, use the following Junos OS command-line interface (CLI) operational mode command:

Action

Sample Output

user@host> show chassis hardware

Meaning

The sample output shows the hardware inventory. The ATM2 IQ interface is in Flexible PIC Concentrator (FPC) slot 0, and PIC slot 1, which translates to at-fpc/pic/port or at-0/1/0. The ATM1 interface name is at-1/1/0.

Identifying the ATM Interface Type

Purpose

Display information about the type of ATM interface.

Action

To determine the type of ATM interface on your router:

Meaning

On an MX Series router with an ATM MIC with SFP, the ATM interface is in FPC slot 2 and PIC slot 2, which translates to at-fpc/pic/port or at-2/2/0.

Table 2 lists the show chassis hardware command output fields.

Table 2: show chassis hardware Output Fields

Field Name

Field Description

Item

Information about the backplane, routing engine, power entry modules (PEM), and fan trays. Also displays information about the FPCs and associated PICs and MPCs and associated MICs or DPCs.

Version

Revision level of the chassis component.

Part Number

Part number of the chassis component.

Serial Number

Serial number of the chassis component. The serial number of the backplane is also the serial number of the router or switch chassis. Use this serial number when you need to contact Juniper Networks Customer Support about the router or switch chassis.

Description

Brief description of the hardware component.

Verifying the ATM Configuration

The supported set of configuration options varies between the ATM1 and ATM2 IQ interfaces. If you configure an ATM1 interface using ATM2 IQ configuration options, the configuration does not commit. The same occurs if you configure an ATM2 IQ interface with ATM1 options. See the Junos Network Interfaces Configuration Guide for more information on the options supported for ATM1 and ATM2 IQ interfaces.

  1. Verifying the Configuration of an ATM1 Interface

  2. Verifying the Configuration of an ATM2 IQ Interface

  3. Verifying the Configuration of an ATM MIC Interface



Verifying the Configuration of an ATM1 Interface

Purpose

The Junos OS assumes an ATM1 interface configuration if you include the maximum-vcs statement without the pic-type statement at the [edit interfaces at-fpc/pic/port atm-options] hierarchy level,

Action

To check the configuration of an ATM1 interface, use the following Junos OS CLI operational mode command:

Sample Output 1

user@host> show configuration interfaces at-0/1/0

Sample Output 2

user@host> show configuration interfaces at-1/0/0

Meaning

The sample output shows the correct configuration of an ATM1 interface. Sample output 1 shows the maximum-vcs statement configured on an ATM interface. Because the pic-type statement is not included in the configuration, this interface is assumed to be an ATM1 interface. Use the show chassis hardware command to verify that the interface is an ATM1. Otherwise this could be the incorrect configuration of an ATM2 IQ interface. Sample output 2 shows the correct configuration of an ATM1 interface with the pic-type statement and the maximum-vcs statement.



Verifying the Configuration of an ATM2 IQ Interface

Purpose

ATM2 IQ interfaces must not have the maximum-vcs statement included in the configuration.

Action

To check the configuration on an ATM2 IQ interface, use the following CLI operational mode command:

Sample Output 1

user@host> show configuration interfaces at-0/1/0

Sample Output 2

user@host> show configuration interfaces at-2/2/0

Meaning

The sample output shows the correct configuration of an ATM2 IQ interface. The first example shows that the interface at-0/1/0 has ATM options configured and the logical interface at-0/1/0.100. Sample output 2 shows another interface at-2/2/0 with the PIC type configured.

Note

The ATM2 IQ interface does not have the maximum-vcs statement included in the configuration.

Verifying the Configuration of an ATM MIC Interface

Purpose

Verify that the ATM MIC interface is configured correctly. ATM MIC interfaces do not have the maximum-cvs and pic-type statements included in the configuration.

Action

To check the configuration of the ATM MIC interface:

Meaning

The sample output shows the correct configuration of an ATM MIC interface. The sample output shows that the interface at-2/2/0 has ATM options configured.

Note

The ATM MIC interface does not have the maximum-cvs statement or the pic-type statement included in the configuration.

Examples of Incorrect Configurations of ATM Options

Even though ATM1 and ATM2 IQ interfaces may be configured with the incorrect options, the configuration may commit but the logical interface may not come up. Here are some examples of incorrectly configured options:

  1. Verifying the Configuration of the VCI on an ATM1 Interface

  2. Verifying the Configuration of the VCI on an ATM2 IQ Interface

  3. Verifying the Configuration of Promiscuous Mode on an ATM2 IQ Interface



Verifying the Configuration of the VCI on an ATM1 Interface

Purpose

If your configuration of the virtual channel identifier (VCI) is incorrect, the logical interface is not created.

Action

To verify that VCI is configured correctly on your ATM1 interface, follow these steps:

  1. Verify the configuration with the following Junos OS CLI operational mode command:

    For example, the following output shows an incorrectly configured ATM1 interface:

    user@host> show configuration interfaces at-1/2/0
  2. Check if the logical interface unit 100 is created with the following command:

    For example, the following output shows that the link is not created:

    user@host> show interfaces terse at-1/2/0
  3. Include the maximum-vcs statement in the configuration:

For example, the following output shows a correctly configured ATM1 interface:

user@host> show configuration interfaces at-0/1/0
  1. Check that the logical interface is created with the following command:

    For example, the following output shows that the link is created:

    user@host# run show interfaces terse at-1/2/0

Meaning

The steps above show that initially the logical interface at-1/2/0.100 is not created because the maximum-vcs statement is not included in the ATM1 configuration. When that statement is included, the logical interface is created.



Verifying the Configuration of the VCI on an ATM2 IQ Interface

Purpose

If your configuration of the VCI is incorrect, the logical interface is not created.

Action

To check that VCI is configured correctly on your ATM2 IQ interface, follow these steps:

  1. Check the configuration with the following Junos OS CLI operational mode command:

    For example, the following output shows an incorrectly configured ATM2 IQ interface:

    user@host> show configuration interfaces at-0/1/0
  2. Check if the logical interface unit 100 is created with the following command:

    For example, the following output shows that the link is not created:

    user@host> show interfaces terse at-0/1/0
  3. Delete the incorrect maximum-vcs statement from the configuration:

    For example, the following output shows a correctly configured ATM2 IQ interface:

    user@host> show configuration interfaces at-0/1/0
  4. Check that the logical interface is created with the following command:

    For example, the following output shows that the link is created:

    user@host> show interfaces terse at-0/1/0

Meaning

The steps above show that initially the logical interface at-0/1/0.100 is not created because the maximum-vcs statement is included in the ATM2 IQ configuration. When that statement is deleted, the logical interface is created.



Verifying the Configuration of Promiscuous Mode on an ATM2 IQ Interface

Purpose

If your configuration of promiscuous mode is incorrect, the logical interface is not created. ATM2 IQ interfaces must have the pic-type atm2 statement included if you are including the promiscuous-mode statement in the configuration.

Action

To check that promiscuous mode is configured correctly on your ATM2 IQ interface, follow these steps:

  1. Check the configuration with the following Junos OS CLI operational mode command:

    For example, the following output shows promiscuous mode incorrectly configured on an ATM2 IQ interface:

    user@host> show configuration interfaces at-1/2/0
  2. Check if the logical interface unit 1 is created with the following command:

    For example, the following output shows that the link is not created:

    user@host# run show interfaces terse at-0/1/0
  3. Include the pic-type statement in the configuration:

    For example, the following output shows promiscuous mode correctly configured on an ATM2 IQ interface:

    user@host> show configuration interfaces at-0/1/0
  4. Check that the logical interface is created with the following command:

    For example, the following output shows that the link is created:

    user@host# run show interfaces terse at-0/1/0

Meaning

The steps above show that initially the logical interface at-0/1/0.1 is not created because the pic-type statement is not included with the promiscuous-mode statement in the ATM2 IQ configuration. When that statement is included, the logical interface is created.