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FTOS Configuration Guide for the C-Series - Force10 Networks

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Table 51 <strong>FTOS</strong> Support <strong>for</strong> Port-based, Policy-based, and Multicast QoS Features<br />

Feature Plat<strong>for</strong>m Direction<br />

Weighted Random Early Detection e Egress<br />

Create WRED Profiles e<br />

Configure WRED <strong>for</strong> Storm Control e<br />

Weighted Fair Queuing <strong>for</strong> Multicast and Unicast e Egress<br />

Pre-calculating Available QoS CAM Space c e —<br />

Viewing QoS CAM Entries e —<br />

Figure 393 <strong>Force10</strong> <strong>Networks</strong> QoS Architecture<br />

Ingress<br />

Packet<br />

Processing<br />

Rate Limiting<br />

Packet<br />

Classification<br />

(ACL)<br />

Egress<br />

Congestion Management<br />

(WFQ Scheduling)<br />

Marking<br />

(DiffServ,<br />

802.1p, Exp)<br />

Buffers &<br />

Class-based<br />

Queues<br />

Congestion<br />

Avoidance<br />

(WRED)<br />

Implementation In<strong>for</strong>mation<br />

Rate Policing<br />

<strong>Force10</strong> <strong>Networks</strong>’ QoS implementation complies with IEEE 802.1p User Priority Bits <strong>for</strong> QoS<br />

Indication. It also implements <strong>the</strong>se Internet Engineering Task Force (IETF) documents:<br />

• RFC 2474, Definition of <strong>the</strong> Differentiated Services Field (DS Field) in <strong>the</strong> IPv4 and IPv6 Headers<br />

• RFC 2475, An Architecture <strong>for</strong> Differentiated Services<br />

• RFC 2597, Assured Forwarding PHB Group<br />

• RFC 2598, An Expedited Forwarding PHB<br />

Egress<br />

Packet<br />

Processing<br />

Buffers &<br />

Class-based<br />

Queues<br />

Traffic<br />

Shaping<br />

Switching<br />

<strong>FTOS</strong> <strong>Configuration</strong> <strong>Guide</strong>, version 7.7.1.0 561

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