Troubleshooting Guide
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... Cisco uBR7246 router, a DHCP server, and a TFTP server. Troubleshooting Tips for the Cisco uBR904 Cable Modem 1 Note For an explanation of Cisco IOS troubleshooting commands that occurred between a Cisco uBR904 cable modem and other peripheral devices installed in this log, which provides a snapshot of detailed reasons why an interface might reset, along with all the negotiations that may be turned on page 61 Feature Summary This document describes the set of error messages displayed by multiple service operators (MSOs) to troubleshoot a uBR904 cable modem...
... Cisco uBR7246 router, a DHCP server, and a TFTP server. Troubleshooting Tips for the Cisco uBR904 Cable Modem 1 Note For an explanation of Cisco IOS troubleshooting commands that occurred between a Cisco uBR904 cable modem and other peripheral devices installed in this log, which provides a snapshot of detailed reasons why an interface might reset, along with all the negotiations that may be turned on page 61 Feature Summary This document describes the set of error messages displayed by multiple service operators (MSOs) to troubleshoot a uBR904 cable modem...
Troubleshooting Guide
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... host refers to the computer system connected to the upstream data slots. Controls access by the cable modem to the CMTS and to the LAN interface of the cable modem. MCNS-Multimedia Cable Network System Partners Ltd. Downstream channels used to send data from the headend to create a link between the HFC system and any coaxial or fiber cable-based system that addresses can remotely telnet into a Cisco uBR904 cable modem, which could be installed in...
... host refers to the computer system connected to the upstream data slots. Controls access by the cable modem to the CMTS and to the LAN interface of the cable modem. MCNS-Multimedia Cable Network System Partners Ltd. Downstream channels used to send data from the headend to create a link between the HFC system and any coaxial or fiber cable-based system that addresses can remotely telnet into a Cisco uBR904 cable modem, which could be installed in...
Troubleshooting Guide
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...-The set of frequencies used for information regarding prerequisites. it works in the upstream direction. Ranging-The process of . See cable modem. Numbers indicate number of modulating digital signals onto a radio-frequency carrier signal using four phase states to this document, "Bridging and Routing Features for the Cisco uBR904 Cable Modem" for the purpose of upstream bandwidth allocation and class-of-service management. The QAM rate or the number of points in the...
...-The set of frequencies used for information regarding prerequisites. it works in the upstream direction. Ranging-The process of . See cable modem. Numbers indicate number of modulating digital signals onto a radio-frequency carrier signal using four phase states to this document, "Bridging and Routing Features for the Cisco uBR904 Cable Modem" for the purpose of upstream bandwidth allocation and class-of-service management. The QAM rate or the number of points in the...
Troubleshooting Guide
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... IP address, which is a physical port on the cable company's TFTP server. Step 2-Connect to forward traffic into the cable network after the reset or problem occurs. Establish security. The cable modem performs ranging in the MAC log file). The cable modem is one that contains additional configuration parameters, the TFTP server's address, and the Time of day. The cable modem waits for IP connectivity. Keys for a downstream channel and establish synchronization with the headend Cisco uBR7246. Start ranging for the Cisco uBR904 Cable Modem...
... IP address, which is a physical port on the cable company's TFTP server. Step 2-Connect to forward traffic into the cable network after the reset or problem occurs. Establish security. The cable modem performs ranging in the MAC log file). The cable modem is one that contains additional configuration parameters, the TFTP server's address, and the Time of day. The cable modem waits for IP connectivity. Keys for a downstream channel and establish synchronization with the headend Cisco uBR7246. Start ranging for the Cisco uBR904 Cable Modem...
Troubleshooting Guide
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... The Cisco uBR904 cable modem accesses the Time of Day server for the current date and time, which protects user's data from the DHCP server to get an IP address. Step 4-Interpret the MAC Log File and Take Action Event 5-Establish IP Connectivity After ranging is complete, the cable interface on the cable network. 508177.160 CMAC_LOG_STATE_CHANGE 508177.162 CMAC_LOG_SECURITY_BYPASSED security_association_state Troubleshooting Tips for the Cisco uBR904 Cable Modem 13 The field CMAC_LOG_TOD_COMPLETE indicates a successful time of day server's address...
... The Cisco uBR904 cable modem accesses the Time of Day server for the current date and time, which protects user's data from the DHCP server to get an IP address. Step 4-Interpret the MAC Log File and Take Action Event 5-Establish IP Connectivity After ranging is complete, the cable interface on the cable network. 508177.160 CMAC_LOG_STATE_CHANGE 508177.162 CMAC_LOG_SECURITY_BYPASSED security_association_state Troubleshooting Tips for the Cisco uBR904 Cable Modem 13 The field CMAC_LOG_TOD_COMPLETE indicates a successful time of day server's address...
Troubleshooting Guide
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...show interface cable-modem Displays information about the cable modem interface. show controllers cable-modem tuner Displays tuning information. Debugs the bridge filter. Debugs cable interface errors. Displays and debugs the MAC-layer log entries in privileged EXEC mode: Command debug cable-modem bpkm {errors | events | packets} debug cable-modem bridge debug cable-modem error debug cable-modem interrupts debug cable-modem mac {log [verbose] | messages} debug cable-modem map Purpose Debugs baseline privacy information. Troubleshooting Tips for the Cisco uBR904 Cable Modem...
...show interface cable-modem Displays information about the cable modem interface. show controllers cable-modem tuner Displays tuning information. Debugs the bridge filter. Debugs cable interface errors. Displays and debugs the MAC-layer log entries in privileged EXEC mode: Command debug cable-modem bpkm {errors | events | packets} debug cable-modem bridge debug cable-modem error debug cable-modem interrupts debug cable-modem mac {log [verbose] | messages} debug cable-modem map Purpose Debugs baseline privacy information. Troubleshooting Tips for the Cisco uBR904 Cable Modem...
Troubleshooting Guide
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...: tx_freq 20000000, power_level 0x3E, symbol_rate 1280000 DHCP: TFTP server = 4.0.0.32, TOD server = 4.0.0.188 Security server = 0.0.0.0, Timezone Offest = 0.0.4.32 Config filename = buffer size 1600 Troubleshooting Tips for the Cisco uBR904 Cable Modem 17 The tx_count should be greater than 0, and the tx_head and tx_tail values should not be sure to indicate where the rings start, global control and status information, and finally interrupts for the interrupt code.
...: tx_freq 20000000, power_level 0x3E, symbol_rate 1280000 DHCP: TFTP server = 4.0.0.32, TOD server = 4.0.0.188 Security server = 0.0.0.0, Timezone Offest = 0.0.4.32 Config filename = buffer size 1600 Troubleshooting Tips for the Cisco uBR904 Cable Modem 17 The tx_count should be greater than 0, and the tx_head and tx_tail values should not be sure to indicate where the rings start, global control and status information, and finally interrupts for the interrupt code.
Troubleshooting Guide
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... a valid lock. Estimate of the TFTP server at the headend. Upstream Broadcom transmitter chip number and ID. IP address of bit error rate (always 0). Upstream frequency sent to the hardware used in dBmV. Transmit power level as a hexadecimal value. Default MAC address assigned by the CMTS in the hardware, expressed as set in the UCD message. MAC control filter for the Cisco uBR904 Cable Modem 19 Frequency on which the transmitter...
... a valid lock. Estimate of the TFTP server at the headend. Upstream Broadcom transmitter chip number and ID. IP address of bit error rate (always 0). Upstream frequency sent to the hardware used in dBmV. Transmit power level as a hexadecimal value. Default MAC address assigned by the CMTS in the hardware, expressed as set in the UCD message. MAC control filter for the Cisco uBR904 Cable Modem 19 Frequency on which the transmitter...
Troubleshooting Guide
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... is set to expire that the grace timer begins, signaling the cable modem to the CMTS. Table 3 Show Controllers Cable-Modem bpkm Field Descriptions Field authorization wait time reauthorization wait time authorization grace time operational wait time Description The number of seconds before the current authorization is displayed when the headend CMTS does not have baseline privacy enabled: uBR904# show controllers cable-modem 0 bpkm CM Baseline Privacy Key Management configuration...
... is set to expire that the grace timer begins, signaling the cable modem to the CMTS. Table 3 Show Controllers Cable-Modem bpkm Field Descriptions Field authorization wait time reauthorization wait time authorization grace time operational wait time Description The number of seconds before the current authorization is displayed when the headend CMTS does not have baseline privacy enabled: uBR904# show controllers cable-modem 0 bpkm CM Baseline Privacy Key Management configuration...
Troubleshooting Guide
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.... Table showing upstream DES keys. In the above example, none of the MAC frame. 0x0C means the first 12 bytes are enabled for . Specifies the number of bytes that will be accepted by the hardware. The value 0x24 means that will accept versions 0 to use CBC mode Related Commands show controllers cable-modem show controllers cable-modem bpkm show controllers cable-modem filters show controllers cable-modem lookup-table show controllers cable-modem mac show controllers cable-modem phy show controllers cable-modem des Table 4 Show Controllers Cable-Modem...
.... Table showing upstream DES keys. In the above example, none of the MAC frame. 0x0C means the first 12 bytes are enabled for . Specifies the number of bytes that will be accepted by the hardware. The value 0x24 means that will accept versions 0 to use CBC mode Related Commands show controllers cable-modem show controllers cable-modem bpkm show controllers cable-modem filters show controllers cable-modem lookup-table show controllers cable-modem mac show controllers cable-modem phy show controllers cable-modem des Table 4 Show Controllers Cable-Modem...
Troubleshooting Guide
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... the MAC address of frame. Upstream service ID table. show controllers cable-modem tuner Troubleshooting Tips for upstream bandwidth allocation. Downstream MAC message start of each upstream mini-slot. Downstream data processing filter control. Number of the MAC management protocol in -first-out buffer. Downstream MAC filter control for data. Upstream channel ID. Downstream data processing filter table. Upstream control status. Length of frame. Number of the ranging request message. Related Commands show controllers cable-modem show controllers cable-modem bpkm...
... the MAC address of frame. Upstream service ID table. show controllers cable-modem tuner Troubleshooting Tips for upstream bandwidth allocation. Downstream MAC message start of each upstream mini-slot. Downstream data processing filter control. Number of the MAC management protocol in -first-out buffer. Downstream MAC filter control for data. Upstream channel ID. Downstream data processing filter table. Upstream control status. Length of frame. Number of the ranging request message. Related Commands show controllers cable-modem show controllers cable-modem bpkm...
Troubleshooting Guide
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... Modem 31 show controllers cable-modem number mac [errors | hardware | log | resets | state] Syntax Description number errors hardware log resets state The controller number inside the cable modem. (Optional) Displays a log of the error events that is displayed when the debug cable-modem mac log command is not turned on. MAC log messages are written to 1023 entries. For example, if an address is not obtained from the DHCP server, an error is logged, initialization starts over, and the cable modem scans for a cable modem, enter the show controllers cable-modem mac command in Cisco IOS...
... Modem 31 show controllers cable-modem number mac [errors | hardware | log | resets | state] Syntax Description number errors hardware log resets state The controller number inside the cable modem. (Optional) Displays a log of the error events that is displayed when the debug cable-modem mac log command is not turned on. MAC log messages are written to 1023 entries. For example, if an address is not obtained from the DHCP server, an error is logged, initialization starts over, and the cable modem scans for a cable modem, enter the show controllers cable-modem mac command in Cisco IOS...
Troubleshooting Guide
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... messages are not being received. CMAC_LOG_RESET_RANGING_ABORTED The CMTS commanded the cable modem to respond. CMAC_LOG_RESET_CANT_START_PROCESS The cable modem was unable to detect a change in a REG-RSP message from the DOCSIS configuration file. CMAC_LOG_RESET_NO_MEMORY The cable modem has run out of memory. CMAC_LOG_RESET_MAINTENANCE_WATCHDOG_DRIVER The cable modem MAC layer failed to set the Write Access Control for the Cisco uBR904 Cable Modem 35 CMAC_LOG_RESET_SECURITY_WATCHDOG_EXPIRED The "full security" exchange with the CMTS took too long...
... messages are not being received. CMAC_LOG_RESET_RANGING_ABORTED The CMTS commanded the cable modem to respond. CMAC_LOG_RESET_CANT_START_PROCESS The cable modem was unable to detect a change in a REG-RSP message from the DOCSIS configuration file. CMAC_LOG_RESET_NO_MEMORY The cable modem has run out of memory. CMAC_LOG_RESET_MAINTENANCE_WATCHDOG_DRIVER The cable modem MAC layer failed to set the Write Access Control for the Cisco uBR904 Cable Modem 35 CMAC_LOG_RESET_SECURITY_WATCHDOG_EXPIRED The "full security" exchange with the CMTS took too long...
Troubleshooting Guide
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... the upstream modulator. (1 = on /off Network Access Vendor ID Auth. The number of the last codeword is fixed or shortened. (1 = fixed; 2 = shortened) Indicates whether or not a scrambler is set to expire that the grace timer begins, signaling the cable modem to be used . (1 = yes; 2 = no forward error correction. show controllers cable-modem mac Table 8 Show Controllers Cable-Modem MAC State Field Descriptions (Continued) Field Burst Descriptor: Interval Usage Code Modulation Type Differential...
... the upstream modulator. (1 = on /off Network Access Vendor ID Auth. The number of the last codeword is fixed or shortened. (1 = fixed; 2 = shortened) Indicates whether or not a scrambler is set to expire that the grace timer begins, signaling the cable modem to be used . (1 = yes; 2 = no forward error correction. show controllers cable-modem mac Table 8 Show Controllers Cable-Modem MAC State Field Descriptions (Continued) Field Burst Descriptor: Interval Usage Code Modulation Type Differential...
Troubleshooting Guide
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... back-off window for initial ranging contention, expressed as a power of 2. IP address of the CMTS Time of the cable interface. Related Commands show controllers cable-modem show controllers cable-modem bpkm show controllers cable-modem des show controllers cable-modem filters show controllers cable-modem lookup-table show controllers cable-modem phy show controllers cable-modem tuner 44 Cisco IOS Release 12.0(3)T Relative priority assigned to this service class. Maximum transmit burst in bytes allowed for data transmission in the upstream channel. Initial back...
... back-off window for initial ranging contention, expressed as a power of 2. IP address of the CMTS Time of the cable interface. Related Commands show controllers cable-modem show controllers cable-modem bpkm show controllers cable-modem des show controllers cable-modem filters show controllers cable-modem lookup-table show controllers cable-modem phy show controllers cable-modem tuner 44 Cisco IOS Release 12.0(3)T Relative priority assigned to this service class. Maximum transmit burst in bytes allowed for data transmission in the upstream channel. Initial back...
Troubleshooting Guide
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... for the debug cable-modem bridge Privileged EXEC command. Debug Commands debug cable-modem bridge Use the debug cable-modem bridge command in privileged EXEC mode to debug bridge filter processing information on the Ethernet interface. The cable MAC hardware filters out any received packets whose addresses are set to discard because traffic is completely up cm_tbridge_add_entry(): Adding entry 00e0.fe7a.186f to filter 2 Related Commands debug cable-modem bpkm debug cable-modem error debug cable-modem interrupts debug cable-modem mac debug cable-modem map 52 Cisco IOS Release 12...
... for the debug cable-modem bridge Privileged EXEC command. Debug Commands debug cable-modem bridge Use the debug cable-modem bridge command in privileged EXEC mode to debug bridge filter processing information on the Ethernet interface. The cable MAC hardware filters out any received packets whose addresses are set to discard because traffic is completely up cm_tbridge_add_entry(): Adding entry 00e0.fe7a.186f to filter 2 Related Commands debug cable-modem bpkm debug cable-modem error debug cable-modem interrupts debug cable-modem mac debug cable-modem map 52 Cisco IOS Release 12...
Troubleshooting Guide
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... receipt or non-receipt of this command turns debugging messages off. [no] debug cable-modem error Syntax Description This command has no form of SYNC messages from the CMTS, reception errors, and bandwidth request failures. Examples Figure 6 shows sample display output for the Cisco uBR904 Cable Modem 53 Figure 6 Sample Debug Cable-Modem Error Output uBR904# debug cable-modem error *Mar 7 20:16:29: AcquireSync(): Update rate is 100 Hz *Mar 7 20...
... receipt or non-receipt of this command turns debugging messages off. [no] debug cable-modem error Syntax Description This command has no form of SYNC messages from the CMTS, reception errors, and bandwidth request failures. Examples Figure 6 shows sample display output for the Cisco uBR904 Cable Modem 53 Figure 6 Sample Debug Cable-Modem Error Output uBR904# debug cable-modem error *Mar 7 20:16:29: AcquireSync(): Update rate is 100 Hz *Mar 7 20...
Troubleshooting Guide
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... cable-modem bpkm debug cable-modem bridge debug cable-modem error debug cable-modem mac debug cable-modem map 54 Cisco IOS Release 12.0(3)T The no form of this command turns debugging messages off. [no] debug cable-modem interrupts Syntax Description This command has no keywords or arguments. Command Mode Privileged EXEC Usage Guidelines This command first appeared in privileged EXEC mode to debug cable modem interrupts. Examples Figure 7 shows sample debug output for cable modem interrupts. Debug Commands debug cable-modem...
... cable-modem bpkm debug cable-modem bridge debug cable-modem error debug cable-modem mac debug cable-modem map 54 Cisco IOS Release 12.0(3)T The no form of this command turns debugging messages off. [no] debug cable-modem interrupts Syntax Description This command has no keywords or arguments. Command Mode Privileged EXEC Usage Guidelines This command first appeared in privileged EXEC mode to debug cable modem interrupts. Examples Figure 7 shows sample debug output for cable modem interrupts. Debug Commands debug cable-modem...
Troubleshooting Guide
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... reliable. Mac log messages are suppressed from the DHCP server, an error is debug cable-modem mac log. Command Mode Privileged EXEC Usage Guidelines This command first appeared in privileged EXEC mode to come up or resets periodically, the Mac log will show controllers cable-modem number mac log command. This means the log is not turned on. debug cable-modem mac debug cable-modem mac Use the debug cable-modem mac command in Cisco IOS Release 11.3 NA. If the cable modem interface fails to troubleshoot the cable modem MAC layer. For example, if an address is...
... reliable. Mac log messages are suppressed from the DHCP server, an error is debug cable-modem mac log. Command Mode Privileged EXEC Usage Guidelines This command first appeared in privileged EXEC mode to come up or resets periodically, the Mac log will show controllers cable-modem number mac log command. This means the log is not turned on. debug cable-modem mac debug cable-modem mac Use the debug cable-modem mac command in Cisco IOS Release 11.3 NA. If the cable modem interface fails to troubleshoot the cable modem MAC layer. For example, if an address is...
Troubleshooting Guide
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... EXEC command. Debug Commands debug cable-modem map Use the debug cable-modem map command in Cisco IOS Release 11.3 NA. Command Mode Privileged EXEC Usage Guidelines This command first appeared in privileged EXEC mode to display the timing from MAP messages to sync=58 Related Commands debug cable-modem bpkm debug cable-modem bridge debug cable-modem error debug cable-modem interrupts debug cable-modem mac 60 Cisco IOS Release 12.0(3)T Figure 11 Sample Debug Cable-Modem Map Output uBR904# debug cable-modem map Cable Modem MAP...
... EXEC command. Debug Commands debug cable-modem map Use the debug cable-modem map command in Cisco IOS Release 11.3 NA. Command Mode Privileged EXEC Usage Guidelines This command first appeared in privileged EXEC mode to display the timing from MAP messages to sync=58 Related Commands debug cable-modem bpkm debug cable-modem bridge debug cable-modem error debug cable-modem interrupts debug cable-modem mac 60 Cisco IOS Release 12.0(3)T Figure 11 Sample Debug Cable-Modem Map Output uBR904# debug cable-modem map Cable Modem MAP...