Cisco UBR904 Troubleshooting Guide - Page 57
debug cable-modem mac, Sample Debug Cable-Modem Mac Log and Verbose Output - specs
![]() |
View all Cisco UBR904 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 57 highlights
debug cable-modem mac Figure 9 compares the output of the debug cable-modem mac log command with the debug cable-modem mac log verbose command. The verbose keyword displays periodic events such as ranging. Figure 9 Sample Debug Cable-Modem Mac Log and Verbose Output uBR904# debug cable mac log Cable Modem mac log debugging is on uBR904# uBR904# uBR904# debug cable mac log verbose Cable Modem mac log debugging is on (verbose) uBR904# 574623.810 CMAC_LOG_RNG_REQ_TRANSMITTED 574623.812 CMAC_LOG_RNG_RSP_MSG_RCVD 574627.942 CMAC_LOG_WATCHDOG_TIMER 574633.880 CMAC_LOG_RNG_REQ_TRANSMITTED 574633.884 CMAC_LOG_RNG_RSP_MSG_RCVD 574643.950 CMAC_LOG_RNG_REQ_TRANSMITTED 574643.954 CMAC_LOG_RNG_RSP_MSG_RCVD 574654.022 CMAC_LOG_RNG_REQ_TRANSMITTED 574654.024 CMAC_LOG_RNG_RSP_MSG_RCVD 574657.978 CMAC_LOG_WATCHDOG_TIMER 574664.094 CMAC_LOG_RNG_REQ_TRANSMITTED 574664.096 CMAC_LOG_RNG_RSP_MSG_RCVD 574674.164 CMAC_LOG_RNG_REQ_TRANSMITTED 574674.166 CMAC_LOG_RNG_RSP_MSG_RCVD uBR904# no debug cable mac log verbose Cable Modem mac log debugging is off uBR904# 574684.234 CMAC_LOG_RNG_REQ_TRANSMITTED 574684.238 CMAC_LOG_RNG_RSP_MSG_RCVD Figure 10 shows display output for the debug cable mac messages command. This command causes received cable MAC management messages to be displayed in a verbose format. The messages that are displayed are UCD, MAP, RNG-RSP, REG-RSP and UCC. In addition, transmitted REG-REQs are displayed in hex dump format. The output from this command is very verbose and is usually not needed for normal interface debugging. The command is most useful when attempting to attach a cable modem to an uncertified CMTS. For a description of the displayed fields of each message, refer to the MCNS DOCSIS RFI spec, v1.0. Figure 10 Sample Debug Cable-Modem Mac Messages Output uBR904# debug cable mac messages *Mar 7 01:44:06: *Mar 7 01:44:06: UCD MESSAGE *Mar 7 01:44:06 *Mar 7 01:44:06: FRAME HEADER *Mar 7 01:44:06: FC - 0xC2 == MAC Management *Mar 7 01:44:06: MAC_PARM - 0x00 *Mar 7 01:44:06: LEN - 0xD3 *Mar 7 01:44:06: MAC MANAGEMENT MESSAGE HEADER *Mar 7 01:44:06: DA - 01E0.2F00.0001 *Mar 7 01:44:06: SA - 00E0.1EA5.BB60 *Mar 7 01:44:06: msg LEN - C1 *Mar 7 01:44:06: DSAP - 0 *Mar 7 01:44:06: SSAP - 0 Troubleshooting Tips for the Cisco uBR904 Cable Modem 57
![](/manual_guide/products/cisco-ubr904-troubleshooting-guide-c3c918d/57.png)