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Catalyst 3750 SwitchSoftware Configuration Guide
OL-8550-09
Chapter1 Overview
Features
•Smart Install to allow a single point of management (director) in a network. You can use Smart
Install to provide zero touch image and configuration upgrade of newly deployed switches and
image and configuration downloads for any client switches. For more information, see the Cisco
Smart Install Configuration Guide.
•Smart Install enhancements in Cisco IOS Release 12.2(55)SE supporting client backup files,
zero-touch replacement for clients with the same product-ID, automatic generation of the image list
file, configurable file repository, hostname changes, transparent connection of the director to client,
and USB storage for image and seed configuration.
Performance Features
•Cisco EnergyWise manages the energy usage of end points including power over Ethernet (PoE)
devices and non-Cisco devices. For information, see the Cisco EnergyWise Configuration Guide.
•Autosensing of port speed and autonegotiation of duplex mode on all switch ports for optimizing
bandwidth.
•Automatic-medium-dependent interface crossover (auto-MDIX) capability on 10/100 and
10/100/1000 Mb/s interfaces and on 10/100/1000 BASE-TX SFP module interfaces that enables the
interface to automatically detect the required cable connection type (straight-through or crossover)
and to configure the connection appropriately.
•Support for up to 1546 bytes routed frames, up to 9000 bytes for frames that are bridged in hardware,
and up to 2000 bytes for frames that are bridged by software.
•IEEE 802.3x flow control on all ports (the switch does not send pause frames).
•Up to 32 Gb/s of forwarding rates in a switch stack.
•EtherChannel for enhanced fault tolerance and for providing up to 8Gb/s (Gigabit EtherChannel)
or 800 Mb/s (Fast EtherChannel) full-duplex bandwidth among switches, routers, and servers.
•Port Aggregation Protocol (PAgP) and Link Aggregation Control Protocol (LACP) for automatic
creation of EtherChannel links.
•Forwarding of Layer 2 and Layer 3 packets at Gigabit line rate across the switches in the stack.
•Multicast virtual routing and forwarding (VRF) Lite for configuring multiple private routing
domains for network virtualization and virtual private multicast networks
•Per-port storm control for preventing broadcast, multicast, and unicast storms.
•Port blocking on forwarding unknown Layer2 unknown unicast, multicast, and bridged broadcast
traffic.
•Cisco Group Management Protocol (CGMP) server support and Internet Group Management
Protocol (IGMP) snooping for IGMP Versions1, 2, and 3:
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(For CGMP devices) CGMP for limiting multicast traffic to specified end stations and reducing
overall network traffic.
–
(For IGMP devices) IGMP snooping for forwarding multimedia and multicast traffic.
•IGMP report suppression for sending only one IGMP report per multicast router query to the
multicast devices (supported only for IGMPv1 or IGMPv2 queries).
•IGMP snooping querier support to configure switch to generate periodic IGMP general query
messages.
•IGMP helper to allow the switch to forward a host request to join a multicast stream to a specific IP
destination address.