Troubleshooting guide

7-21
Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
OL-5169-01
Chapter 7 Troubleshooting the CMTS
Troubleshooting the Cisco uBR7246VXR
Assigned SID: 4
Max Downstream Rate: 10000000
Max Upstream Rate: 1024000
Upstream Priority: 7
Min Upstream Rate: 0
Max Upstream Burst: 0
Privacy Enable: FALSE
[Rest of display been omitted]
Online means the cable modem has come online and is able to communicate with the Cisco
uBR7246VXR. If BPI (Baseline Privacy Interface) is not enabled then the online status is the default
state (assuming the cable modem initialization was successful). If BPI is configured then you will see a
status of online(pk), followed shortly by online(pt).Following is a debug output display taken on the
cable modem side using the debug cable-modem mac log verbose command, showing only the
registration part:
5d03h: 445197.804 CMAC_LOG_STATE_CHANGE registration_state
5d03h: 445197.804 CMAC_LOG_REG_REQ_MSG_QUEUED
5d03h: 445197.812 CMAC_LOG_REG_REQ_TRANSMITTED
5d03h: 445197.816 CMAC_LOG_REG_RSP_MSG_RCVD
5d03h: 445197.816 CMAC_LOG_COS_ASSIGNED_SID 1/4
5d03h: 445197.816 CMAC_LOG_RNG_REQ_QUEUED 4
5d03h: 445197.816 CMAC_LOG_REGISTRATION_OK
5d03h: 445197.816 CMAC_LOG_STATE_CHANGE establish_privacy_state
5d03h: 445197.820 CMAC_LOG_PRIVACY_FSM_STATE_CHANGE
machine: KEK, event/state: EVENT_1_PROVISIONED/STATE_A_START, new state:
STATE_B_AUTH_WAIT
5d03h: 445197.828 CMAC_LOG_BPKM_REQ_TRANSMITTED
5d03h: 445197.848 CMAC_LOG_BPKM_RSP_MSG_RCVD
5d03h: 445197.848 CMAC_LOG_PRIVACY_FSM_STATE_CHANGE
machine: KEK, event/state: EVENT_3_AUTH_REPLY/STATE_B_AUTH_WAIT, new state:
STATE_C_AUTHORIZED
5d03h: 445198.524 CMAC_LOG_PRIVACY_FSM_STATE_CHANGE
machine: TEK, event/state: EVENT_2_AUTHORIZED/STATE_A_START, new state: STATE_B_OP_WAIT
5d03h: 445198.536 CMAC_LOG_RNG_REQ_TRANSMITTED
5d03h: 445198.536 CMAC_LOG_RNG_RSP_MSG_RCVD
5d03h: 445198.536 CMAC_LOG_BPKM_REQ_TRANSMITTED
5d03h: 445198.536 CMAC_LOG_BPKM_RSP_MSG_RCVD
5d03h: 445198.540 CMAC_LOG_PRIVACY_FSM_STATE_CHANGE
machine: TEK, event/state: EVENT_8_KEY_REPLY/STATE_B_OP_WAIT, new state:
STATE_D_OPERATIONAL
5d03h: 445198.548 CMAC_LOG_PRIVACY_INSTALLED_KEY_FOR_SID 4
5d03h: 445198.548 CMAC_LOG_PRIVACY_ESTABLISHED
5d03h: 445198.552 CMAC_LOG_STATE_CHANGE maintenance_state
5d03h: 445201.484 CMAC_LOG_RNG_REQ_TRANSMITTED
5d03h: 445201.484 CMAC_LOG_RNG_RSP_MSG_RCVD
If there is a problem with BPI in general you will see reject(pk), meaning it could not get through the
key authentication stage. This state is covered in the reject(pk) and reject (pt) section.
For correct BPI operation ensure that the Cisco uBR7246VXR and the cable modem are both running a
BPI enabled image, which is signified by the symbol K1 in the image name.
Also ensure that the field Baseline Privacy Enable is set to 1 under the Class of Service option in the
DOCSIS CPE Configurator. If the Cisco uBR7246VXR is running a BPI enabled image while the cable
modem is not, and we have BPI enabled in the DOCSIS CPE Configurator, then you will observe the
cable modem cycling between online and offline.