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About the Switches 13
Summary of
Hardware Features
Table 3 summarizes the hardware features that are supported by the
Switches.
Table 3 Hardware features
Feature Switch 4900 Series
Fast Ethernet
and Gigabit
Ethernet Ports
Switch 4900: 12 Auto-negotiating 100BASE-TX/1000BASE-T
ports
Switch 4900 SX: 12 Auto-negotiating 1000BASE-SX ports
Switch 4924: 24 Auto-negotiating
10BASE-T/100BASE-TX/1000BASE-T ports
Switch 4950: 12 Auto-negotiating
10BASE-T/100BASE-TX/1000BASE-T, 6 1000BASE-SX and
6 GBIC ports
Addresses ■ Up to 12,000 supported
■ Up to 64 permanent entries
Forwarding
Modes
Store and Forward
Duplex Modes ■ Half duplex only supported on
10BASE-T/100BASE-TX/1000BASE-T ports in 10/100 Mbps
mode
■ All 1000 Mbps ports are full duplex only
Flow Control Supported on all ports
Smart
auto-sensing
■ Supported on all 10BASE-T/100BASE-TX/1000BASE-T ports
■ Not supported on 1000BASE-SX and GBIC ports
Traffic
Prioritization
Supported (IEEE Std 802.1D, 1998 Edition)
Four traffic queues per port
Layer 3
Switching
Support for wire-speed IP routing
RPS Support Connects to SuperStack 3 Advanced Redundant Power System
(ARPS) (3C16071B)
XRN Support eXpandable Resilient Networking (XRN) support. Allows
interconnection of two units to create a Distributed Fabric.
Mounting 19-inch rack or stand-alone mounting