Specifications

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Catalyst 2970 Switch Software Configuration Guide
78-15462-03
Chapter 1 Overview
Features
– 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
– 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 determining the rate at which packets
are dequeued to the internal ring (sharing is the only supported mode on ingress queues)
• Egress queues and scheduling
– Four egress queues per port
– WTD as the congestion-avoidance mechanism for managing the queue lengths and providing
drop precedences for different traffic classifications
– SRR as the scheduling service for determining the rate at which packets are dequeued to the
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.
Monitoring Features
• Switch LEDs that provide port- and switch-level status
• MAC address notification traps and RADIUS accounting for tracking users on a network by storing
the MAC addresses that the switch has learned or removed
• Switched Port Analyzer (SPAN) and Remote SPAN (RSPAN) for traffic monitoring on any port or
VLAN
• SPAN and RSPAN support of Intrusion Detection Systems (IDS) to monitor, repel, and report
network security violations
• Four groups (history, statistics, alarms, and events) of embedded RMON agents for network
monitoring and traffic analysis
• Syslog facility for logging system messages about authentication or authorization errors, resource
issues, and time-out events
• Layer 2 traceroute to identify the physical path that a packet takes from a source device to a
destination device
• Time Domain Reflector (TDR) to diagnose and resolve cabling problems on copper Ethernet
10/100/1000 ports