Alcatel-Lucent 1850 User Provisioning Manual page 89

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Quality of service
The Quality of Service contains the following sub-options:
PHB Profile
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OAM PHB Profile
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Traffic Descriptor
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Queue Management
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PHB profile
A PHB Profile is the externally observable forwarding behavior applied at a DS-compliant
(Diff-Serv) node belonging to a DS domain. A set of "data treatments" (defined as PSCs)
are requested to be applied to packets on each NE inside DiffServ domain, where this
treatment includes both:
Selection of the queue and schedule discipline to apply at NE egress interface
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Congestion thresholds to be applied over NE egress queues
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The user can profile the NE forwarding behavior for TU Segment and PW Segment,
combining PHB. The user can use the following PSCs:
EF MPLS Expedited Forwarding - Used to give preferential queuing treatment in a
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Strict Priority queue. Useful to provide low loss, low jitter and low delay handling
within an MPLS node.
HIGH2 - Used for delay/jitter sensitive traffic and sharping both the same relationship
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with MPLS PSC bandwidth-based parameter and the same queuing type as in MPLS
EF PSC.
AF Assured Forwarding - This defines 4 independent forwarding classes (denoted as
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AF1, AF2, AF3, and AF4). These PSCs are used when, in case of congestion, is
necessary to define the drop precedence of a packet according to An class. Both Green
and Yellow packets belonging to the same AF class are not requested to be re-ordered
from the system and are requested to be sent to the same egress WFQ forwarding
queue. This PSC is composed by 8 PHB [AF11, AF12, AF21, AF22, AF31, AF32,
AF41, AF42].
DE Default Behavior - Identifies the existing "best effort" traffic
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LOW2 - The same queuing type and the same relationship with MPLS PSC
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bandwidth-based parameters as in MPLS DE PSC
Figure 3-11
system with the following:
Corresponding Ethernet Forwarding Classes
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Queue types (either Strict Priority queue or Weighted Fair Queue)
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8DG08763KAAA
Issue 1 February 2009
is a table reports MPLS Diff-Serv Forwarding Plane as supported in the
(T)-MPLS menu
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