Cisco UBR924 - uBR 924 Router Troubleshooting Tips page 13

You can display other aspects of the MAC layer by using variations of the show controllers
cable-modem 0 mac command:
For examples and descriptions of how to use these keywords, see the show controllers
cable-modem mac command reference page.
Step 4—Interpret the MAC Log File and Take Action
The MAC log file gives a detailed history of initialization events that occurred in the Cisco uBR924.
All pertinent troubleshooting information is stored here.
The following sample log file is broken down into the chronological sequence of events listed below.
Sample comments are also included in the log file.
•
•
•
•
•
•
•
•
•
•
•
508178.318 CMAC_LOG_RNG_REQ_QUEUED
508178.320 CMAC_LOG_REGISTRATION_OK
508178.322 CMAC_LOG_REG_RSP_ACK_MSG_QUEUED
508178.324 CMAC_LOG_STATE_CHANGE
508178.326 CMAC_LOG_NO_PRIVACY
508178.328 CMAC_LOG_STATE_CHANGE
uBR924# show controllers cable-modem 0 mac ?
errors Mac Error Log data
hardware All CM Mac Hardware registers
log Mac log data
resets Resets of the MAC
state Current MAC state
Event 1—Wait for the Link to Come Up
Event 2—Scan for a Downstream Channel, then Synchronize
Event 3—Obtain Upstream Parameters
Event 4—Start Ranging for Power Adjustments
Event 5—Establish IP Connectivity
Event 6—Establish the Time of Day
Event 7—Establish Security
Event 8—Transfer Operational Parameters
Event 9—Perform Registration
Event 10—Comply with Baseline Privacy
Event 11—Enter the Maintenance State
Step 4—Interpret the MAC Log File and Take Action
Troubleshooting Tips for the Cisco uBR924 Cable Access Router 13
19
0
establish_privacy_state
maintenance_state