Queue Group Templates And Port Queue Groups - Alcatel-Lucent 7950 Quality Of Service Manual

Queue Group Templates and Port Queue Groups

Queue Group Templates
Before a queue group with a specific name may be created on a port or an IOM/IMM/XMA
ingress forwarding plane, a queue group template with the same name must first be created. The
template is used to define each queue, scheduling attributes and its default parameters. When a
queue or policer is defined in a queue group template, that queue will exist in every instance of a
port or forwarding plane queue group with that template name. The default queue or policer
parameters (such as rate or mbs values) may be overridden with a specific value in each queue
group. This works in a similar manner to SAP ingress or SAP egress QoS policies.
Queue sharing is also supported if the High Scale MDA (HSMDA) is used. On ingress, HSMDA
queues are bypassed, and the queue group on the IOM forwarding plane is used. On egress, it is
possible to redirect forwarding classes from multiple SAPs to an HSMDA queue group. Note that
the HSMDA also uses the term queue group to describe a group of 8 pre-configured hardware
queues on its egress port. When queue sharing and redirection is configured on egress, a set of 8
HSMDA queues could be configured as a part of the queue group template. These correspond to 8
hardware queues on the HSMDA. When all eight (8) egress fcs are mapped to the queue-group
instantiated in the egress port, the per-sap hsmda queue-group resource is freed.
Port Queue Groups
Once an ingress or egress queue group template is defined, a port based queue group with the same
name may be created. Port queue groups are named objects that act as a container for a group of
queues. The queues are created based on the defined queue IDs within the associated queue group
template. Port queue groups must be created individually on the ingress and egress sides of the
port, but multiple port queue groups of the same template name may be created on egress ports if
they have a different instance identifier. These are termed 'queue group instances'. Each instance
of a named queue group created on a port is an independent set of queues structured as per the
queue group template. Port queue groups are only supported on Ethernet ports and may be created
on ports within a LAG.
Percent-Rate Support
The percent-rate command is supported in a queue group template for pir and cir parameters
only for egress queues. The user has the option of specifying percent-rate for pir and cir
parameters. For pir, the range is 0.01 to 100.00, and for cir, the range is 0.00 to 100.00.
7950 XRS Quality of Service Guide
Ingress and Egress Queue Group Creation and Redirection
Page 313