The front-panel LEDs provide troubleshooting information about the switch. Refer to the Catalyst 2950 Desktop Switch Software Configuration Guide , the Catalyst 2950 Desktop Switch Command Reference , or the documentation that came with your SNMP application for details. While the switch powers on, it begins POST, a series of tests.
POST runs automatically to verify that the switch functions properly.
When the switch begins POST, the system LED is off. If POST completes successfully, the LED turns green. If POST fails, the LED turns amber. Note POST failures are usually fatal. Poor performance No connectivity Corrupted software Table 3-1 describes how to detect and solve these problems.