Cisco Catalyst 2960 Series User Manual

CHAPTER 17
Configuring Optional Spanning-Tree Features
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Finding Feature Information, page 287
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Restriction for Optional Spanning-Tree Features, page 287
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Information About Optional Spanning-Tree Features, page 288
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How to Configure Optional Spanning-Tree Features, page 302
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Examples, page 320
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Monitoring the Spanning-Tree Status, page 322
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Feature Information for Optional Spanning-Tree Features, page 322
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and
feature information, see Bug Search Tool and the release notes for your platform and software release. To
find information about the features documented in this module, and to see a list of the releases in which each
feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not
required.
Restriction for Optional Spanning-Tree Features
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PortFast minimizes the time that interfaces must wait for spanning tree to converge, so it is effective
only when used on interfaces connected to end stations. If you enable PortFast on an interface connecting
to another switch, you risk creating a spanning-tree loop.
Related Topics
Enabling PortFast , on page 302
PortFast, on page 288
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
287

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000