Cisco Catalyst 2950 Software Configuration Manual page 39

Chapter 1 Overview
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Note
Redundancy
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Directed unicast requests to a TFTP server for obtaining software upgrades from a TFTP server
Default configuration storage in flash memory to ensure that the switch can be connected to a
network and can forward traffic with minimal user intervention
In-band management access through the embedded device manager through a Netscape Navigator
or Internet Explorer session or through Network Assistant
In-band management access through up to 16 simultaneous Telnet connections for multiple
command-line interface (CLI)-based sessions over the network
In-band management access through up to five simultaneous, encrypted Secure Shell (SSH)
connections for multiple CLI-based sessions over the network (only available in the enhanced
cryptographic software image)
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 and a modem
For additional descriptions of the management interfaces, see the
section on page 1-9.
HSRP for command-switch redundancy
UniDirectional Link Detection (UDLD) on all Ethernet ports 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.
Up to 64 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
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– UplinkFast, cross-stack UplinkFast, and BackboneFast for fast convergence after a
spanning-tree topology change and for achieving load balancing among redundant uplinks,
including Gigabit uplinks and cross-stack Gigabit uplinks
IEEE 802.1s Multiple Spanning Tree Protocol (MSTP) for grouping VLANs into a spanning-tree
instance and for providing multiple forwarding paths for data traffic and load balancing and rapid
per-VLAN Spanning-Tree plus (rapid-PVST+), based on the IEEE 802.1w Rapid Spanning Tree
Protocol (RSTP) for rapid convergence of the spanning tree by immediately transitioning root and
designated ports to the forwarding state
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
Features
"Management Options"
1-5