Catalyst 2900 LRE XL switches control upstream and downstream rates on Long-Reach Ethernet (LRE) links by using configurations called profiles. You can assign profiles on a per-port or on a switch-wide basis. When the LRE port establishes a link with the CPE, the switch downloads its profile settings to the CPE port so that both ports on both devices operate with the same configuration.
The LRE link is the connection between the switch LRE port and the WAN port on a remote customer premises equipment (CPE) such as the Cisco 575 LRE CPE. The LRE link is not the same as the Ethernet link. For information about the LRE and Ethernet links on an LRE port, see LRE Port Considerations.
Catalyst 2900 LRE XL switches are shipped with predefined profiles (LRE Port 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 in effect.
When assigning a profile to an 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 connections to the LRE ports:
The data rates displayed from the show controllers lre status and show controllers lre profile commands are slightly different than those described in this table.
Profile Name | LRE
Link Downstream Rate (Mbps) | LRE
Link Upstream Rate (Mbps) |
Maximum Distance between the LRE Port and the CPE |
PUBLIC-ANSI | 15.16 | 5.69 | 4101 ft (1250 m) |
PUBLIC-ETSI | 11.375 | 5.69 | 4101 ft (1250 m) |
LRE-5 | 5.69 | 5.69 | 4921 ft (1500 m) |
LRE-5LL | 5.69 | 5.69 | 4921 ft (1500 m) |
LRE-10 (default) | 11.375 | 11.375 | 4101 ft (1250 m) |
LRE-10LL | 11.375 | 11.375 | 4101 ft (1250 m) |
LRE-15 | 15.16 | 17.06 | 3116 ft (950 m) |
LRE-15LL | 15.16 | 17.06 | 3116 ft (950 m) |
Note: The interleaver feature, which protects against bursts of noise, is disabled when you use a profile ending in LL. We recommend that you use profiles LRE-5, LRE-10, or LRE-15 instead.