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Examples: Oversubscribing Interface Bandwidth

This section provides the following examples:

Two logical interface units, 0 and 1, are shaped to rates 2 Mbps and 3 Mbps, respectively. The delay-buffer rates are 750 Kbps and 500 Kbps, respectively. The actual delay buffers allocated to each logical interface are 1 second of 750 Kbps and 2 seconds of 500 Kbps, respectively. The 1-second and 2-second values are based on the following calculations:

delay-buffer-rate < [16 x 64 Kbps]): 1 second of delay-buffer-rate
delay-buffer-rate < [8 x 64 Kbps]): 2 seconds of delay-buffer-rate

For more information about these calculations, see Maximum Delay Buffer for NxDS0 Interfaces.

Oversubscribing a Channelized Interface

chassis {
fpc 3 {
pic 0 {
q-pic-large-buffer;
}
}
}
interfaces {
t1-3/0/0 {
per-unit-scheduler;
}
}
class-of-service {
traffic-control-profiles {
tc-profile1 {
shaping-rate 2m;
delay-buffer-rate 750k; # 750 Kbps is less than 16 x 64 Kbps
scheduler-map sched-map1;
}
tc-profile2 {
shaping-rate 3m;
delay-buffer-rate 500k; # 500 Kbps is less than 8 x 64 Kbps
scheduler-map sched-map2;
}
}
interfaces {
t1-3/0/0 {
unit 0 {
output-traffic-control-profile tc-profile1;
}
unit 1 {
output-traffic-control-profile tc-profile2;
}
}
}
}

Apply a traffic-control profile to a logical interface representing a DLCI on an FRF.16 bundle:

Oversubscribing an LSQ Interface

interfaces {
lsq-1/3/0:0 {
per-unit-scheduler;
unit 0 {
dlci 100;
}
unit 1 {
dlci 200;
}
}
}
 
class-of-service {
traffic-control-profiles {
tc_0 {
shaping-rate percent 100;
guaranteed-rate percent 60;
delay-buffer-rate percent 80;
}
tc_1 {
shaping-rate percent 80;
guaranteed-rate percent 40;
}
}
interfaces {
lsq-1/3/0 {
unit 0 {
output-traffic-control-profile tc_0;
}
unit 1 {
output-traffic-control-profile tc_1;
}
}
}
}
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