Cisco 2950 Software Configuration Guide - Page 280

Configuring LRE Ports Chapter 13 Configuring LRE 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: Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Command Purpose configure terminal Enter global configuration mode. interface interface-id Enter the number of the LRE port to be configured, and enter interface configuration mode. sequence sequence-name Enter the port sequence name (select from the list in Table 13-3 on page 13-5 or Table 13-4 on page 13-6). end Return to privileged EXEC mode. show controllers lre status sequence Verify the change. copy running-config startup-config (Optional) Save your entries in the configuration file. 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 profile in the sequence and successively tries the next profiles (in descending order) until a link is established with the CPE 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 13-14 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10