Specifications

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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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Chapter 1 Overview
Features
Note This software release does not support the Catalyst 2950 LRE switches. For information about these
switches, refer to documentation for the Catalyst 2950 LRE switches.
This section describes the features supported in this release:
Note Some features require that you have the EI installed on your switch. For a list of the switches that support
the EI, see Table 1-1, or refer to the release notes for this release.
Ease of Use and Ease of Deployment
• Cluster Management Suite (CMS) software for simplifying switch and switch cluster management
through a web browser, such as Netscape Communicator or Microsoft Internet Explorer, from
anywhere in your intranet
• Switch clustering technology used with CMS for
– Unified configuration, monitoring, authentication, and software upgrade of multiple switches
(refer to the release notes for a list of eligible cluster members).
– Automatic discovery of candidate switches and creation of clusters of up to 16 switches that can
be managed through a single IP address.
– Extended discovery of cluster candidates that are not directly connected to the command switch.
• Hot Standby Router Protocol (HSRP) for command-switch redundancy. The redundant command
switches used for HSRP must have compatible software releases.
Note See the “Advantages of Using CMS and Clustering Switches” section on page 1-8. Refer to the
release notes for the CMS, cluster hardware, software, and browser requirements.
Performance
• Autosensing of speed on the 10/100 and 10/100/1000 ports and autonegotiation of duplex mode on
the 10/100 ports for optimizing bandwidth
• IEEE 802.3X flow control on Gigabit Ethernet ports operating in full-duplex mode
• Fast EtherChannel and Gigabit EtherChannel for enhanced fault tolerance and for providing up
to 2 Gbps of bandwidth between switches, routers, and servers
• Support for frames larger than 1500 bytes. The Catalyst 2950G-12-EI, 2950G-24-EI, 2950G-24-EI-DC,
and 2950G-48-EI switches running Cisco IOS Release 12.1(6)EA2 or later support frame sizes from
1500 to 1530 bytes. The Catalyst 2955C-12, 2955S-12, and 2955T-12 switches running
Release 12.1(12c)EA1 or later also support frame sizes from 1500 to 1530 bytes.
Catalyst 2955S-12 EI
Catalyst 2955T-12 EI
1. SI = standard software image
Table 1-1 Switches Supported (continued)
Switch
Software
Image