Service Egress and Ingress QoS Policies
310
Quality of Service Guide
3HE 11014 AAAC TQZZA Edition: 01
dot1p
Syntax dot1p dot1p-priority [fc fc-name] [priority {high | low}]
no dot1p dot1p-priority
Context config>qos>sap-ingress
Description This command explicitly sets the forwarding class and/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 eight Class-of-Service (CoS) values commonly
used to map packets to per-hop Quality-of-Service (QoS) behavior.
For QinQ applications, the dot1p bits used for classification are from either the top or bottom
tag based on the match-qinq-dot1p configuration. For more information, refer to the
command description and the “QinQ Dot1p Match Behavior” section in the
7705 SAR Services Guide.
The no form of this command removes the explicit dot1p classification rule from the service
ingress policy. Removing the rule on the policy immediately removes the rule on all ingress
SAPs using the policy.
Parameters dot1p-priority — 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 0 to 7
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-name
parameter is defined on the rule. If the packet matches and the forwarding class is
not explicitly defined in the rule, the forwarding class is inherited based on previous
rule matches.
Values be, l2, af, l1, h2, ef, h1, nc
Default n/a
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