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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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Chapter 12 Configuring LRE
Configuring LRE Ports
between 100-Mbps half duplex and 100-Mbps full duplex. Use the cpe duplex and cpe speed interface
configuration commands, respectively, to configure the duplex and speed settings on the Cisco 575 LRE
CPE or the 576 LRE 997 CPE Ethernet port.
You cannot disable CPE toggle on a link from a Cisco 575 LRE or Cisco 576 LRE CPE to a remote
device (such as a PC).
Guidelines for Configuring Cisco 585 LRE CPEs
You can configure the Cisco 585 LRE CPE Ethernet port speed and duplex mode from the CLI,
depending on the capability of the remote Ethernet device. Autonegotiation for CPE port speed and
duplex mode is supported. Use the cpe duplex and cpe speed interface configuration commands,
respectively, to configure the duplex and speed settings on a Cisco 585 LRE CPE Ethernet port.
The default speed for the CPE Ethernet ports is auto. The default duplex mode is half duplex at 100 Mbps
with back pressure.
You can enable or disable the CPE Ethernet ports on a per-port basis.
You can disable CPE toggle on a Cisco 585 LRE CPE.
The loopback interface configuration command is not supported on the LRE ports. External loopback
on the LRE ports is also not supported. Connecting a CPE Ethernet port to another Ethernet port on the
same CPE device can create a loop. If this happens, the switch stops sending to the CPE device and
blocks Ethernet traffic coming from the CPE device.
Assigning a Global Profile to All LRE Ports
Global profiles are set on a switch-wide basis.
Port sequences, global sequences, and port profiles have priority over global profiles (see the
“Precedence” section on page 12-15). If you assign a global profile to the switch, it cannot override any
previously or subsequently set sequence port profile. For more information on sequence and profile
precendence, see the “Guidelines for Using LRE Profiles” section on page 12-10.
Changes to the global profile settings are immediately put in effect, and the global mode automatically
becomes the active mode.
Beginning in privileged EXEC mode, follow these steps to assign a global profile to the LRE ports:
To return to the default global profile, use the no lre profile profile-name global configuration command.
To display the LRE link statistics and profile information on the LRE ports, use the show controllers
lre privileged EXEC commands.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
lre profile profile-name Enter the global profile name. Select from the list in Table 12-1 on page 12-3
or Table 12-2 on page 12-4.
Step 3
end Return to privileged EXEC mode.
Step 4
show controllers lre profile details Verify the change.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.
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