Cisco Systems IE 2000 QoS and CoS Features

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Cisco IE 2000 Switch Software Configuration Guide
OL-25866-01
Chapter 1 Configuration Overview
Feature Software Licensing
• Support for 3DES and AES with version 3 of the Simple Network Management Protocol (SNMPv3).
This release adds support for the 168-bit Triple Data Encryption Standard (3DES) and the 128-bit,
192-bit, and 256-bit Advanced Encryption Standard (AES) encryption algorithms to SNMPv3.
QoS and CoS Features
Note These features require the LAN Base image.
• Automatic QoS (auto-QoS) to simplify the deployment of existing QoS features by classifying
traffic and configuring egress queues
• Automatic quality of service (QoS) Voice over IP (VoIP) enhancement for port-based trust of DSCP
and priority queuing for egress traffic
• Classification
– IP type-of-service/Differentiated Services Code Point (IP ToS/DSCP) and IEEE 802.1p CoS
marking priorities on a per-port basis for protecting the performa nce of mission-critical
applications
– IP ToS/DSCP and IEEE 802.1p CoS marking based on flow-based packet classification
(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
– 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
received, and ensuring port security
• Policing
– 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
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
traffic flows to metered, predefined rates.
• Out-of-profile
– Out-of-profile markdown for packets that exceed bandwidth utilization limits
• Ingress queueing and scheduling
– Two configurable ingress queues for user traffic (one queue can be the priority queue)
– Weighted tail drop (WTD) as the congestion-avoidance mechanism for managing the queue
lengths and providing drop precedences for different traffic classifications
– Shaped round robin (SRR) as the scheduling service for specifying the rate at which packets are
sent to the ring (sharing is the only supported mode on ing ress queues)
• Egress queues and scheduling
– Four egress queues per port.