Qos And Cos Features - Cisco 3020 - Catalyst Blade Switch Configuration Manual
Cisco catalyst blade switch 3020 for hp software configuration guide, rel. 12.2(25)sef1
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Also See for 3020 - Cisco Catalyst Blade Switch:
- Command reference manual (744 pages) ,
- Release note (54 pages) ,
- Getting started manual (37 pages)
Table of Contents
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Chapter 1
Overview
QoS and CoS Features
These are the QoS and CoS features:
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OL-8915-01
Automatic QoS (auto-QoS) to simplify the deployment of existing QoS features by classifying
traffic and configuring egress queues
Classification
IP type-of-service/Differentiated Services Code Point (IP ToS/DSCP) and IEEE 802.1p CoS
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marking priorities on a per-port basis for protecting the performance of mission-critical
applications
IP ToS/DSCP and IEEE 802.1p CoS marking based on flow-based packet classification
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(classification based on information in the MAC, IP, and TCP/UDP headers) for
high-performance quality of service at the network edge, allowing for differentiated service
levels for different types of network traffic and for prioritizing mission-critical traffic in the
network
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Trusted port states (CoS, DSCP, and IP precedence) within a QoS domain and with a port
bordering another QoS domain
Trusted boundary for detecting the presence of a Cisco IP Phone, trusting the CoS value
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received, and ensuring port security
Policing
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Traffic-policing policies on the switch port for managing how much of the port bandwidth
should be allocated to a specific traffic flow
If you configure multiple class maps for a hierarchical policy map, each class map can be
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associated with its own port-level (second-level) policy map. Each second-level policy map can
have a different policer.
Aggregate policing for policing traffic flows in aggregate to restrict specific applications or
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traffic flows to metered, predefined rates
Out-of-Profile
Out-of-profile markdown for packets that exceed bandwidth utilization limits
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Ingress queueing and scheduling
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Two configurable ingress queues for user traffic (one queue can be the priority queue)
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Weighted tail drop (WTD) as the congestion-avoidance mechanism for managing the queue
lengths and providing drop precedences for different traffic classifications
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Shaped round robin (SRR) as the scheduling service for specifying the rate at which packets are
sent to the internal ring (sharing is the only supported mode on ingress queues)
Egress queues and scheduling
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Four egress queues per port
WTD as the congestion-avoidance mechanism for managing the queue lengths and providing
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drop precedences for different traffic classifications
SRR as the scheduling service for specifying the rate at which packets are dequeued to the
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egress interface (shaping or sharing is supported on egress queues). Shaped egress queues are
guaranteed but limited to using a share of port bandwidth. Shared egress queues are also
guaranteed a configured share of bandwidth, but can use more than the guarantee if other queues
become empty and do not use their share of the bandwidth.
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
Features
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Table of Contents
Troubleshooting
