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CoS Hierarchy Configuration Examples

To make settings consistent across Juniper Networks routers, you configure many CoS settings used on the adaptive services interface at the [edit class-of-service] hierarchy level. When you commit this configuration along with what you configure at the [edit services cos] hierarchy level, these properties are applied to the AS or MultiServices PIC.

The following configuration examples at the [edit class-of-service] hierarchy level can be applied on the adaptive services interface. For more information, see the JUNOS Class of Service Configuration Guide.

Note: The first two configurations, forwarding-class name to forwarding-class ID mapping and forwarding-class name to queue number mapping, are mutually exclusive.

Forwarding-Class Name to Forwarding-Class ID Mapping

This configuration example illustrates the mapping between the forwarding-class name and the forwarding-class ID:



[edit class-of-service]
forwarding-classes {
forwarding-class fc0 0;
forwarding-class fc1 0;
forwarding-class fc2 1;
forwarding-class fc3 1;
forwarding-class fc4 2;
forwarding-class fc5 2;
forwarding-class fc6 3;
forwarding-class fc7 3;
forwarding-class fc8 4;
forwarding-class fc9 4;
forwarding-class fc10 5;
forwarding-class fc11 5;
forwarding-class fc12 6;
forwarding-class fc13 6;
forwarding-class fc14 7;
forwarding-class fc15 7;
}

Forwarding-Class Name to Queue Number Mapping

This configuration specifies the mapping between the forwarding-class name and a queue number:



[edit class-of-service]
forwarding-classes {
queue queue-number class-name <priority (high | low)>;
}

The following is a configuration example:



forwarding-classes {
queue 0 be;
queue 1 ef;
queue 2 af;
queue 3 nc;
queue 4 ef1;
queue 5 ef2;
queue 6 af1;
queue 7 nc1;
}

Diffserv Code Point Alias to DSCP Bits Mapping

This configuration provides a mapping from an alias name to a DSCP bit value. The alias then can be used instead of the DSCP bits in adaptive services configurations.



[edit class-of-service]
code-point-aliases {


(dscp | dscp-ipv6 | exp | ieee-802.1 | inet-precedence)
{

alias | bits;
}


}

Here is an example:



code-point-aliases {


dscp {
my1 110001;
my2 101110;
be 000001;
cs7 110000;
}


}

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