Nortel Networks 5530, 5520, 5510 manual Overview Ethernet Routing Switch 5500 QoS and Filtering

Filters and QoS Configuration for ERS 5500
Technical Configuration Guide	v2.0	NN48500-559

1.Overview: Ethernet Routing Switch 5500 QoS and Filtering

The Ethernet Routing Switch 5500 supports QoS and filter configuration via WEB, CLI, and Device Manager with no support for COPS at this time. As shown in the diagram below, the following functional components provide QoS support on the Ethernet Routing Switch 5500:

•Role Combination on the ingress port

•Classify traffic at either Layer 2 or at a Layer 3/4 level

•Take action by dropping, marking, redirecting, or metering (policing) traffic

•Send traffic to appropriate egress queue

			Classifier
	Port
	Port
	Port	Counters/
				Meter
Role Combinations
	Port
				Marker
(ingress port group)		Statistics		Dropper
				r
				Redirecto
				Actions

Figure 1: QoS System Diagram

Role Combination

Queue

Queue

Queue

Queue

Egress ports

A role combination is a grouping of one or more ports, capabilities, and interface classifications against which a policy is applied. The capabilities presently supported on the Ethernet Routing Switch 5500 include ingress IP and Layer 2 classification. The Ethernet Routing Switch 5500 supports the following interface classes that can be applied to zero, one, or many interfaces:

•Trusted Ports

o Assumes that all traffic coming into the port is originating from a trusted source. Therefore, the DSCP field of any traffic that enters the Ethernet Routing Switch 5500 from a Trusted Port is not remarked by default. However, a policy can still be applied to a trusted port to remark if required. Note that only the 802.1p user priority value associated with ‘well-known’ DSCP values are remapped by the default trusted

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