Assigning Profiles to LRE Ports

The Long-Reach Ethernet (LRE) switches control upstream and downstream rates on the LRE links by using configurations called profiles. You can assign profiles on a per-port or switch-wide basis.

The LRE link is the connection between the switch LRE port and the RJ-11 wall port on a LRE customer premises equipment (CPE) device such as the Cisco 575 LRE CPE or Cisco 585 LRE CPE. When the LRE switch establishes a link with the CPE, the switch downloads its profile settings to the CPE so that the switch and CPE operate with the same configuration. The LRE link is not the same as the CPE Ethernet link. For information about the LRE links and CPE Ethernet links, see LRE Port Considerations.

The LRE switches are shipped with predefined profiles (Types of LRE Profiles) categorized as public (global) mode and private (per-port) mode profiles. By default, all LRE ports on the switch are enabled with the LRE-10 private profile. This profile allows the upstream and downstream transmission rate on the LRE link to be 10 Mbps.

When assigning a profile to a LRE port, keep these considerations in mind:

To change the profile assigned to the LRE ports, use the LRE Profiles window. To display this window, choose Device > LRE Profiles.

To troubleshoot the LRE links and CPE Ethernet links:

Note: You can configure and monitor the Ethernet link on a Cisco 575 LRE CPE. However, you cannot configure the Ethernet links on a Cisco 585 LRE CPE. You can only monitor the Ethernet links on the Cisco 585 LRE CPE by using the show remote interfaces status user EXEC command.

Types of LRE Profiles

The profiles you choose are based on the requirements of your LRE environment. For the environmental factors that can influence your LRE environment and for a complete list of guidelines for using the LRE profiles, refer to the switch software configuration guide.

Note: Use the rates and distances in this table as guidelines only. Factors such as the type of cable you use, how it is bundled, and the interference and noise on the LRE link can affect the actual LRE link performance. Contact Cisco Systems for information about limitations and optimization of LRE link performance. The net data rates in the table below are slightly less than the gross data rates displayed by the show controllers lre profile names privileged EXEC command.

Profile Name Profile Type LRE Link
Downstream
Rate (Mbps)
LRE Link
Upstream
Rate (Mbps)
Maximum Distance between
the LRE Switch and LRE CPE
PUBLIC-ANSI
Public 15.17 4.27 4101 ft (1250 m)
PUBLIC-ETSI Public 11.375 4.27 4101 ft (1250 m)
LRE-5
Private 5.69 5.69 4921 ft (1500 m)
LRE-10 (default) Private 11.375 11.375 4101 ft (1250 m)
LRE-15 Private 15.17 17.06 3445 ft (950 m)
LRE-10-1 Private 11.38 1.43 4101 ft (1250 m)
LRE-10-3
Private 11.38 2.87 4101 ft (1250 m)
LRE-10-5 Private 11.38 5.69 4101 ft (1250 m)
LRE-5LL
Private 5.69 5.69 4921 ft (1500 m)
LRE-10LL Private 11.375 11.375 4101 ft (1250 m)
LRE-15LL Private 15.17 17.06 3445 ft (1050 m)

Related Web Link

"Configuring the Switch Ports," Catalyst 2900 XL and Catalyst 3500 XL Software Configuration Guide