Network QoS Policies
Quality of Service Guide 115
dot1p
Syntax dot1p dot1p-priority fc fc-name profile {in | out | use-de}
no dot1p dot1p-priority
Context config>qos>network>ingress
Description This command explicitly sets the forwarding class or enqueuing priorityand profile of the packet 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 be assigned to the forwarding class and enqueuing
priority and profile of the packet 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 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 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 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
profile {in | out | use-de} — All packets that are assigned to this forwarding class will be
considered in or out of profile based on this command or to use the DE1 bit to determine the
profile of the packets. In case of congestion, the in-profile packets are preferentially queued
over the out-of-profile packets.
Default none, the profile name must be specified.
dscp
Syntax dscp dscp-name fc fc-name profile {in | out}
no dscp dscp-name
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