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B-18
Cisco uBR924 Software Configuration Guide
OL-0337-05 (8/2002)
Appendix B Using the Cable Monitor Tool
Sample Pages
• Signal to Noise Ratio Estimate—The current SNR value used to determine the Signal Quality.
• Lock Threshold—The lock threshold value used to determine the Signal Quality.
• Power Level—The current upstream power level that the router is using.
The following are errors encountered by the router at the MAC layer:
• Mac Resets—The number of times that the router has reset its MAC layer.
• Sync Lost—The number of times that the router has lost sync on the cable interface and the link has
gone down.
• Invalid Maps—The number of invalid MAPs that the router has received from the CMTS.
• Invalid UCDs—The number of invalid UCDs that the router has received from the CMTS.
• Invalid Ranging Response—The number of invalid ranging responses that the router has received
from the CMTS.
• Invalid Registration Response—The number of invalid registration responses that the router has
received from the CMTS. Typically, an invalid registration response is due to either an
authentication failure or a class of service failure.
• T1 Timeouts—The number of times that the router timed out waiting for a UCD message from the
CMTS.
• T2 Timeouts—The number of times that the router timed out waiting for a broadcast ranging
response from the CMTS.
• T3 Timeouts—The number of times that the router timed out waiting for a ranging response from
the CMTS.
• T4 Timeouts—The number of times the router has reinitialized its MAC layer because it did not
receive a Periodic Ranging opportunity from the CMTS.
• Range Aborts—The number of times that the CMTS has instructed the router to abort a ranging
attempt, typically because of excessive ranging or excessive power levels.