Network Qos Policies For Access-Uplink Mode - Alcatel-Lucent 7210 SAS M OS Quality Of Service Manual

QoS Overview

Network QoS Policies for Access-uplink Mode

Network QoS policies of type 'port' define ingress forwarding class meters and maps traffic to
those meters for access uplink ports. When a network QoS policy is created, it always has two
meters/policers defined that cannot be deleted, one for the all unicast traffic and one for all
multipoint traffic. These meters exist within the definition of the policy. The meters only get
instantiated in hardware when the policy is applied to an access uplink port. It also defines the
forwarding class to priority bit marking, on the egress.
A network QoS policy of type 'port' defines both the ingress and egress handling of QoS on the
access uplink ports. The following functions are defined:
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The required elements to be defined in a network QoS policy of type 'port' are:
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Optional network QoS policy elements include:
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Network policy ID 1 is reserved as the default network QoS policy of type 'port'. The default
policy cannot be deleted or changed. The default network QoS policy is applied to all access
uplink ports which do not have another network QoS policy explicitly assigned. The network QoS
policy applied at network egress (for example, on an access uplink port) determines how or if the
profile state is marked in packets transmitted into the service core network. If the profile state is
marked in the service core packets, out-of-profile packets are preferentially dropped over in-
profile packets at congestion points in the core network. For network egress, traffic remarking in
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Ingress
→ Defines Dot1p value mapping to forwarding classes (DSCP is not available for use)
→ Defines forwarding class to meter mapping.
Egress
→ Defines the forwarding class to Dot1p value markings.
→ Remarking of QoS bits can be enabled or disabled.
A unique network QoS policy ID.
Egress forwarding class to Dot1p value mappings for each forwarding class.
A default ingress forwarding class and in-profile/out-of-profile state.
At least one default unicast forwarding class meter. The parameters that can be configured
for a meter are discussed in
At least one multipoint forwarding class meter.
Additional unicast meters up to a total of 11.
Additional multipoint meters up to 11.
Dot1p value to forwarding class and profile state mappings for all Dot1p values received.
on page 40.
7210 SAS M OS Quality of Service Guide