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CHAPTER
12-1
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
OL-10101-02
12
Configuring LRE
This chapter describes how to configure the Long-Reach Ethernet (LRE) features on your
Catalyst
2950 LRE switch. This chapter consists of these sections:
• Understanding LRE Features, page 12-1
• Configuring LRE Ports, page 12-8
• Upgrading LRE Switch Firmware, page 12-23
• Displaying LRE Status, page 12-27
Note For complete syntax and usage information for the commands used in this chapter, see the switch
command reference for this release and the Cisco IOS Interface Command Reference for Cisco IOS
Release 12.1.
For information about which Cisco LRE customer premises equipment (CPE) devices are supported by
the LRE switches, see
Table 1-2 on page 1-2.
Understanding LRE Features
These sections describe LRE features:
• Ports on the Catalyst 2950 LRE Switches, page 12-1
• LRE Links and LRE Profiles, page 12-2
• LRE Message Logging Process, page 12-7
Ports on the Catalyst 2950 LRE Switches
The Catalyst 2950 LRE switches use LRE technology to transfer data, voice, and video traffic over
categorized and noncategorized unshielded twisted-pair cable (Category 1, 2, and
3 structured and
unstructured cable such as existing telephone lines).
Connecting a switch LRE port to a remote Ethernet device (such as a PC) requires two types of
connections: