Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual page 36

JunosE 11.3.x Quality of Service Configuration Guide
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Table 3: QoS Terminology (continued)
Term
Effective weight
Group node
HAR
HRR
Latency
Proprietary QoS
Management Information
Base (MIB)
Queue
QoS port-type profile
QoS profile attachment
Rate shaping
RED
Scheduler hierarchy
Scheduler node
Shaping rate
Description
The result of a weight or an assured rate. Users configure the
scheduler node by specifying either an assured rate or a weight within
a scheduler profile. An assured rate, in bits per second, is translated
into a weight. The resultant weight is referred to as an effective
weight.
A scheduler node associated with a {port interface, traffic-class
group} pair. Because the logical interface is the port, only one such
scheduler node can exist for each traffic-class group above the port.
This node aggregates all traffic for traffic classes in the group.
Hierarchical assured rate. Dynamically adjusts bandwidth for
scheduler nodes.
Hierarchical round-robin. Allocates bandwidth to queues in proportion
to their weights.
Delay in the transmission of a packet through a network from
beginning to end.
Supported on the E Series router.
First-in-first-out (FIFO) set of buffers that control packets on the
data path.
Supplies the QoS information for forwarding interfaces stacked above
ports of the associated interface type.
Applies the rules in the QoS profile to a specific interface.
Allows you to throttle a queue to a specified rate.
Random early detection congestion avoidance technique.
A hierarchical, tree-like arrangement of scheduler nodes and queues.
The router supports up to three levels of scheduler nodes stacked
above a port. The port scheduler is at level 0, with two levels of
scheduler nodes at levels 1 and 2. A final level of queues is stacked
above the nodes.
An element within the hierarchical scheduler that implements
bandwidth controls for a group of queues. Queues are stacked above
scheduler nodes in a hierarchy. The root node is associated with a
channel or physical port.
Bandwidth in a queue or node can be throttled to a specified rate.
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