Specifications

1-6
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-07
Chapter 1 Overview
Features
Quality of Service and Class of Service
• Automatic QoS (auto-QoS) to simplify the deployment of existing QoS features by classifying
traffic and configuring egress queues (voice over IP only) (only available in the EI)
• Classification
– IP Differentiated Services Code Point (IP DSCP) and class of service (CoS) marking priorities
on a per-port basis for protecting the performance of mission-critical applications (only
available with the EI)
– 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 (only available in the EI)
– Support for IEEE 802.1P CoS scheduling for classification and preferential treatment of
high-priority voice traffic
– Trusted boundary (detect the presence of a Cisco IP Phone, trust the CoS value received, and
ensure port security. If the IP phone is not detected, disable the trusted setting on the port and
prevent misuse of a high-priority queue.)
• Policing
– Traffic-policing policies on the switch port for allocating the amount of the port bandwidth to
a specific traffic flow
– Policing traffic flows to restrict specific applications or traffic flows to metered, predefined
rates
– Up to 60 policers on ingress Gigabit-capable Ethernet ports
Up to six policers on ingress 10/100 ports
Granularity of 1 Mbps on 10/100 ports and 8 Mbps on 10/100/1000 ports
– Out-of-profile markdown for packets that exceed bandwidth utilization limits
Note Policing is available only in the EI.
• Egress Policing and Scheduling of Egress Queues—Four egress queues on all switch ports. Support
for strict priority and weighted round-robin (WRR) CoS policies
Monitoring
• Switch LEDs that provide visual port and switch status
• Switched Port Analyzer (SPAN) and Remote SPAN (RSPAN) for traffic monitoring on any port or
VLAN
Note RSPAN is available only in the EI.
• SPAN support of Intrusion Detection Systems (IDSs) to monitor, repel, and report network security
violations
• Four groups (history, statistics, alarms, and events) of embedded remote monitoring (RMON) agents
for network monitoring and traffic analysis
• MAC address notification for tracking the MAC addresses that the switch has learned or removed