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Catalyst2950 and Catalyst2955 Switch Software Configuration Guide
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Chapter13 Configuring LRE
Configuring LRE Ports
To display the LRE link statistics and sequence information on the LRE ports, use the show controllers
lre status sequence details privileged EXEC command.
Assigning a Sequence to a Specific LRE Port
You can set sequences on a per-port basis. You can assign the same sequence or different sequences to
the LRE ports on the switch. If you assign a sequence on a per-port basis, it overrides any previously or
subsequently set profiles or global sequence.
The switch resets the ports with the updated sequence settings when they are changed.
Beginning in privileged EXEC mode, follow these steps to assign a sequence to a specific LRE port:
To remove a sequence from a port, use the no sequence sequence-name interface configuration
command.
To display the LRE link statistics and sequence information on the LRE ports, use the show controllers
lre status sequence details privileged EXEC command.
Using Rate Selection to Automatically Assign Profiles
An LRE network requires a profile to be configured for each LRE port that is connected to a CPE device.
The default is LRE-10 on the Catalyst 2950ST-8 LRE and 2950ST-24 LRE switches and LRE-6 on the
Catalyst 2950ST-24 LRE 997 switch. You can use the rate selection feature to automatically choose a
profile from a set of profiles that the switch port uses to establish an LRE link (a link between an LRE
switch port and an attached CPE device).
Rate selection is enabled by default, but you must choose a sequence for rate selection to start (in other
words, there is no default sequence defined). When rate selection is running, the switch chooses the
profile for the LRE interface from a sequence, or predefined series of profiles, that are configured for
that interface. The rate-selection algorithm begins with the first prof ile in the seque nce and successively
tries the next profiles (in descending order) until a link is establ is hed wi th t he C P E device.
When rate selection is enabled, the LRE switch executes rate selection in these scenarios:
•When the switch is started up
•When you enable the rate selection feature
•When you connect a new CPE device to the switch
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Enter the number of the LRE port to be configured, and enter interface
configuration mode.
Step3 sequence sequence-name Enter the port sequence name (select from the list in Table13-3 on
page13-5 or Table 13-4 on page 13-6).
Step4 end Return to privileged EXEC mode.
Step5 show controllers lre status sequence Verify the change.
Step6 copy running-config startup-config (Optional) Save your entries in the configuration file.