Service Egress and Ingress QoS Policies
Quality of Service Guide 237
Parameters high — Setting the enqueuing parameter to high for a packet increases the likelihood of
enqueuing the packet when the ingress queue is congested. Ingress enqueuing priority only
affects ingress SAP queuing, once the packet is placed in a buffer on the ingress queue, the
significance of the enqueuing priority is lost.
low — Setting the enqueuing parameter to low for a packet decreases the likelihood of enqueuing
the packet when the ingress queue is congested. Ingress enqueuing priority only affects
ingress SAP queuing, once the packet is placed in a buffer on the ingress queue, the
significance of the enqueuing priority is lost.
fc
Syntax [no] fc fc-name
Context config>qos>sap-ingress
Description The fc command creates a class or sub-class instance of the forwarding class fc-name. Once the fc-
name is created, classification actions can be applied and the sub-class can be used in match
classification criteria. Attempting to use an undefined sub-class in a classification command will result
in an execution error and the command will fail.
The no form of the command removes all the explicit queue mappings for fc-name forwarding types.
The queue mappings revert to the default queues for fc-name. To successfully remove a sub-class, all
associations with the sub-class in the classification commands within the policy must first be removed
or diverted to another forwarding class or sub-class.
Parameters fc-name — The parameter sub-class-name is optional and must be defined using a dot separated
notation with a preceding valid system-wide forwarding class name. Creating a sub-class
follows normal naming conventions. Up to sixteen ASCII characters may be used. If the same
sub-name is used with two or more forwarding class names, each is considered a different
instance of sub-class. A sub-class must always be specified with its preceding forwarding
class name. When a forwarding class is created or specified without the optional sub-class,
the parent forwarding class is assumed.
Within the SAP ingress QoS policy, up to 56 sub classes may be created. Each of the 56 sub-
classes may be created within any of the eight parental forwarding classes. Once the limit of
56 is reached, any further sub-class creations will fail and the sub-class will not exist.
Successfully creating a sub-class places the CLI within the context of the sub-class for further
sub-class parameter definitions. Within the sub-class context, commands may be executed
that define sub-class priority (within the parent forwarding class queue mapping), sub-class
color aware profile settings, sub-class in-profile and out-of-profile precedence or DSCP
markings.
The sub-class-name parameter is optional and used with the fc-name parameter to define a
preexisting sub-class. The fc-name and sub-class-name parameters must be separated by a
period (dot). If sub-class-name does not exist in the context of fc -name, an error will occur.
If sub-class-name is removed using the no fc fc-name.sub-class-name force command, the
default-fc command will automatically drop the sub-class-name and only use fc-name (the
parent forwarding class for the sub-class) as the forwarding class.
Values
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