Queue Sharing and Redirection
414 Quality of Service Guide
b. When a PW packet for that FC is forwarded and an instance of the referenced
queue-group name does not exist on that egress port, the PW packet is fed
directly to the corresponding egress shared queue for that FC defined in the
network-queue policy applied to the egress of this port.
c. If a network QoS policy is applied to the egress context of a PW, any PW FC,
which is not explicitly redirected in the network, QoS policy has the
corresponding packets feed directly the corresponding the egress shared queue
for that FC defined in the network-queue policy applied to the egress of this port.
Egress Marking of PW Packet Header
When the queue-group name the PW is redirected to exists and the redirection succeeds, the
marking of the packet’s DEI/dot1p/DSCP and the tunnel’s DEI/dot1p/DSCP/EXP is
performed according to the relevant mappings of the {FC, profile} in the egress context of
the network QoS policy applied to the PW. This is true if an instance of the queue-group
exists on the egress port the PW packet is forwarded to. If the packet’s profile value changed
due to egress child policer CIR profiling, the new profile value is used to mark the packet’s
DEI/dot1p and the tunnel’s DEI/dot1p/EXP and the DSCP/prec will be remarked if enable-
dscp-prec-marking is enabled under the policer.
When the redirection command succeeds but there is no instance of the queue-group on the
egress port, or when the redirection command fails due to an inexistent queue-group name,
the marking of the packet’s DEI/dot1p/DSCP and the tunnel’s DEI/dot1p/DSCP/EXP fields
is performed according to the relevant commands in the egress context of the network QoS
policy applied to the network IP interface the PW packet is forwarded to.
Egress Packet Re-Classification Based on IPv4/IPv6 Criteria
The user enables IP precedence or DSCP based egress re-classification by applying the
following command in the context of the network QoS policy applied to the egress context of
a spoke-SDP.
config>qos>network>egress>prec ip-prec-value [fc fc-name] [profile {in | out}]
config>qos>network>egress>dscp dscp-name [fc fc-name] [profile {in | out}]
The IP precedence bits used to match against DSCP reclassification rules come from the Type
of Service (ToS) field within the IPv4 header or the Traffic Class field from the IPv6 header.
The IP DSCP bits used to match against DSCP reclassification rules come from the Type of
Service (ToS) field within the IPv4 header or the Traffic Class field from the IPv6 header.
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