Cisco Catalyst 2960-XR Configuration Guide

CHAPTER 4
Configuring Optional Spanning-Tree Features
•
Finding Feature Information, page 79
•
Restriction for Optional Spanning-Tree Features, page 79
•
Information About Optional Spanning-Tree Features, page 80
•
How to Configure Optional Spanning-Tree Features, page 90
•
Monitoring the Spanning-Tree Status, page 102
•
Additional References for Optional Spanning Tree Features, page 102
•
Feature Information for Optional Spanning-Tree Features, page 103
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature
information and caveats, see the release notes for your platform and software release.
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
•
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 90
PortFast, on page 80
Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
OL-29424-01 79

Cisco Catalyst 2960-XR Specifications

General

Stacking Bandwidth	80 Gbps
Layer Support	Layer 2 and Layer 3
Jumbo Frame Support	9198 bytes
RAM	512 MB
Input Voltage	100-240V AC
Model	Catalyst 2960-XR
Uplink Interfaces	4 x 1G SFP or 2 x 10G SFP+
Downlink Interfaces	24 or 48 x Gigabit Ethernet ports
Power Supply	Internal
MAC Address Table Size	16, 000 entries
PoE	Available on PoE models
Weight	4.5 kg
Features	energy efficiency
Stacking	Up to 8 switches
Operating Temperature	0 to 45°C