Supported Platforms; Queue Group Applications; Access Sap Queue Group Applications - Alcatel-Lucent 7450 Quality Of Service Manual

Queue Sharing and Redirection

Supported Platforms

Queue sharing and redirection is supported on the SR and ESS platforms with the following
IOM types:
Queue sharing and redirection are also supported in conjunction with the use of existing
Ethernet MDA, Ethernet CMA, HS-MDA and the VSM MDA.

Queue Group Applications

Access SAP Queue Group Applications

Normally, each SAP (Service Access Point) has dedicated ingress and egress queues that are
only used by that particular SAP. The SAP queues are created based on the queue definitions
within the SAP ingress and SAP egress QoS policy applied to the SAP. Each packet that
enters or egresses the SAP has an associated forwarding class. The QoS policy is used to map
the forwarding class to one of the SAP's local queue IDs. This per-SAP queuing has
advantages over a shared queuing model in that it allows each SAP to have a unique
scheduling context per queue. During congestion, SAPs operating within their conforming
bandwidth will experience little impact since they do not need to compete for queue buffer
space with misbehaving or heavily loaded SAPs.
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• Network ingress supports the creation of multiple queue groups at the ingress
forwarding plane level of the IOM/IMM/XMA. These queue groups may only
contain policers.
• Network egress supports the creation of multiple queue groups per egress port. These
queue groups may contain queues only, or queues and policers.
• Access SAP port queue group supported on IOM-1 of types the iom-10g, iom-20g,
and iom- 20g-b. Network queue groups are not supported.
• Access SAP port and network port queue group are supported on IOM-2s.
• Access SAP port and network port queue groups are supported on FP2 and higher
based hardware
• Ingress access and network forwarding plane queue groups are supported on FP2 and
higher based hardware except on the 7750 SR-a4/a8..
Quality of Service Guide