Cisco 3750G - Catalyst Integrated Wireless LAN Controller Configuration Manual page 58

Features
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Availability and Redundancy Features
These are the availability and redundancy features:
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Catalyst 3750 Switch Software Configuration Guide
1-6
Network Time Protocol (NTP) for providing a consistent time stamp to all switches from an external
source
Cisco IOS File System (IFS) for providing a single interface to all file systems that the switch uses
Configuration logging to log and to view changes to the switch configuration
Unique device identifier to provide product identification information through a show inventory
user EXEC command display
In-band management access through the device manager over a Netscape Navigator or Microsoft
Internet Explorer browser session
In-band management access for up to 16 simultaneous Telnet connections for multiple CLI-based
sessions over the network
In-band management access for up to five simultaneous, encrypted Secure Shell (SSH) connections
for multiple CLI-based sessions over the network (requires the cryptographic versions of the
software IP base and IP services images)
In-band management access through SNMP Versions 1, 2c, and 3 get and set requests
Out-of-band management access through the switch console port to a directly attached terminal or
to a remote terminal through a serial connection or a modem
Secure Copy Protocol (SCP) feature to provide a secure and authenticated method for copying
switch configuration or switch image files (requires the cryptographic versions of the software IP
base and IP services images)
On the Catalyst 3750G Integrated Wireless LAN Controller Switch only, an integrated Catalyst 3750
switch and Cisco 4400 series wireless LAN controller that supports up to 25 or 50 lightweight access
points
HSRP for command switch and Layer 3 router redundancy
Automatic stack master re-election for replacing stack masters that become unavailable (failover
support)
The newly elected stack master begins accepting Layer 2 traffic in less than 1 second and Layer 3
traffic between 3 to 5 seconds.
Cross-stack EtherChannel for providing redundant links across the switch stack
UniDirectional Link Detection (UDLD) and aggressive UDLD for detecting and disabling
unidirectional links on fiber-optic interfaces caused by incorrect fiber-optic wiring or port faults
IEEE 802.1D Spanning Tree Protocol (STP) for redundant backbone connections and loop-free
networks. STP has these features:
Up to 128 spanning-tree instances supported
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Per-VLAN spanning-tree plus (PVST+) for load balancing across VLANs
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Rapid PVST+ for load balancing across VLANs and providing rapid convergence of
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spanning-tree instances
UplinkFast, cross-stack UplinkFast, and BackboneFast for fast convergence after a
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spanning-tree topology change and for achieving load balancing between redundant uplinks,
including Gigabit uplinks and cross-stack Gigabit uplinks
Chapter 1 Overview
OL-8550-02