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Configuring Per-Unit Schedulers for Channelized Interfaces

You can configure per-unit scheduling on T1 and DS0 physical interfaces configured on channelized DS3 and STM1 IQ PICs. To enable per-unit scheduling, configure the per-unit-scheduler statements at the [edit interfaces interface-name] hierarchy level.

When per-unit scheduling is enabled on the channelized PICs, you can associate a scheduler map with the physical interface. For more information about configuring scheduler maps, see Configuring the Scheduler Map.

The following example configures per-unit scheduling on a channelized DS3 PIC and an STM1 IQ PIC.



[edit interfaces]
ct3-5/3/1 {
partition 1 interface-type t1;
}
t1-5/3/1:1 {
per-unit-scheduler; # This enables per-unit scheduling
encapsulation frame-relay;


unit 0 {
dlci 1;


family inet {
address 10.0.0.2/32;
}


}


}
ct3-5/3/0 {
partition 1 interface-type ct1;
}
ct1-5/3/0:1 {
partition 1 timeslots 1 interface-type ds;
}
ds-5/3/0:1:1 {
per-unit-scheduler; # This enables per-unit scheduling
encapsulation frame-relay;


unit 0 {
dlci 1;


family inet {
address 10.0.0.1/32;
}


}


}
cau4-3/0/0 {
partition 1 interface-type ce1;
}
cstm1-3/0/0 {
no-partition 1 interface-type cau4;
}
ce1-3/0/0:1 {
partition 1 timeslots 1 interface-type ds;
}
ds-3/0/0:1:1 {
per-unit-scheduler; # This enables per-unit scheduling
encapsulation frame-relay;


unit 0 {
dlci 1;


family inet {
address 10.1.1.1/32;
}


}


}

[edit class-of-service]
classifiers 


dscp all-traffic-dscp {


forwarding-class assured-forwarding {
loss-priority low code-points 001010;
}




forwarding-class expedited-forwarding {
loss-priority low code-points 101110;
}




forwarding-class best-effort {
loss-priority low code-points 101010;
}




forwarding-class network-control {
loss-priority low code-points 000110;
}


}


}
forwarding-classes {
queue 0 best-effort;
queue 1 assured-forwarding;
queue 2 expedited-forwarding;
queue 3 network–control;
}
interfaces {


ds-3/0/0:1:1 {


unit 0 {
scheduler-map schedule-mlppp;
}


}




ds-5/3/0:1:1 {


unit 0 {
scheduler-map schedule-mlppp;
}


}




t1-5/3/1:1 {


unit 0 {
scheduler-map schedule-mlppp;
}


}


}
scheduler-maps {


schedule-mlppp {
forwarding-class expedited-forwarding scheduler expedited-forwarding;
forwarding-class assured-forwarding scheduler assured-forwarding;
forwarding-class best-effort scheduler best-effort;
forwarding-class network-control scheduler network-control;
}


}
schedulers {


best-effort {
transmit-rate percent 2;
buffer-size percent 5;
priority low;
}




assured-forwarding {
transmit-rate percent 7;
buffer-size percent 30;
priority low;
}




expedited-forwarding {
transmit-rate percent 90 exact;
buffer-size percent 60;
priority high;
}




network-control {
transmit-rate percent 1;
buffer-size percent 5;
priority strict-high;
}


}

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