Alcatel-Lucent 7950 Quality Of Service Manual page 180

Service Ingress QoS Policy Commands
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
Default
dot1p
Syntax dot1p dot1p-value [fc fc-name] [profile {in |out | use-de}]
no dot1p dot1p-value
Context config>qos>sap-ingress
Description
This command explicitly sets the forwarding class or sub-class or enqueuing priority when a packet is
marked with a dot1p-priority specified. Adding a dot1p rule on the policy forces packets that match the
dot1p-priority specified to override the forwarding class and enqueuing priority based on the parameters
included in the dot1p rule. When the forwarding class is not specified in the rule, a matching packet
preserves (or inherits) the existing forwarding class derived from earlier matches in the classification
hierarchy. When the enqueuing priority is not specified in the rule, a matching packet preserves (or inherits)
the existing enqueuing priority derived from earlier matches in the classification hierarchy.
The dot1p-priority is derived from the most significant three bits in the IEEE 802.1Q or IEEE 802.1P
header. The three dot1p bits define 8 Class-of-Service (CoS) values commonly used to map packets to per-
hop Quality-of-Service (QoS) behavior.
The no form of this command removes the explicit dot1p classification rule from the SAP ingress policy.
Removing the rule on the policy immediately removes the rule on all ingress SAPs using the policy.
Parameters
dot1p-value — This value is a required parameter that specifies the unique IEEE 802.1P value that will
match the dot1p rule. If the command is executed multiple times with the same dot1p-value, the
previous forwarding class and enqueuing priority is completely overridden by the new parameters or
defined to be inherited when a forwarding class or enqueuing priority parameter is missing.
A maximum of eight dot1p rules are allowed on a single policy.
Values
fc fc-name — The value given for the fc-name parameter must be one of the predefined forwarding classes
in the system. Specifying the fc-name is optional. When a packet matches the rule, the forwarding class
is only overridden when the fc fc-name parameter is defined on the rule. If the packet matches and the
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fc: class[.sub-class]
None (Each sub-class-name must be explicitly defined)
0 — 7
class: be, l2, af, l1, h2, ef, h1, nc
sub-class: 29 characters max
7950 XRS Quality of Service Guide