Check that the ATM Configuration Is Correct

Purpose

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. Check the Configuration of an ATM1 Interface
2. Check the Configuration of an ATM2 IQ Interface

Check the Configuration of an ATM1 Interface

Purpose

The JUNOS software 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 CLI operational mode command:

Sample Output 1

atm-options {
    vpi 1 {
         maximum-vcs 1024;
    }
}
unit 100 {
    vci 1.100;
    family inet {
        address 25.25.25.2/30;
    }
}

Sample Output 2

atm-options {
pic-type atm1;
vpi 0 maximum-vcs 256;
vpi 1 maximum-vcs 512;
}

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.

See the JUNOS Network Interfaces Configuration Guide, for more information on configuring ATM1 interfaces.

Check 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

atm-options {
    vpi 1;
}
unit 100 {
    vci 1.100;
    family inet {
        address 25.25.25.1/30;
    }
}

Sample Output 2

atm-options {
     pic-type atm2 ;
    vpi 1;
}
unit 100 {
    encapsulation ether-over-atm-llc;
    vci 1.100;
    shaping {
        vbr peak 66k sustained 66k burst 40;
    }
    family inet {
        address 192.168.5.1/24;
    }
}
[...Output truncated...]

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.

See the JUNOS Network Interfaces Configuration Guide, for more information on configuring ATM2 IQ interfaces.