Cisco Systems UBR900 Example 2, Example 3

debug cable-modem mac

Configuring the Cisco uBR900 Series Cable Access Routers 129

0 events dropped due to lack of a chunk

The line “0 events dropped due to lack of a chunk” at the end of a display indicates that no

log entries were discarded due to a temporary lack of memory. This means the log is accurate and

reliable.

Example 2

The following example 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.

uBR924# debug cable mac log

Cable Modem mac log debugging is on

uBR924#

uBR924# debug cable mac log verbose

Cable Modem mac log debugging is on (verbose)

uBR924#

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

uBR924# no debug cable mac log verbose

Cable Modem mac log debugging is off

uBR924#

574684.234 CMAC_LOG_RNG_REQ_TRANSMITTED

574684.238 CMAC_LOG_RNG_RSP_MSG_RCVD

Example 3

The following example 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 shown below:

uBR924# debug cable-modem mac messages ?

dynsrv dynamic service mac messages

map map messages received

reg-req reg-req messages transmitted

reg-rsp reg-rsp messages received

rng-req rng-req messages transmitted

rng-rsp rng-rsp messages received

sync Sync messages received

ucc-req ucc-req messages received

ucc-rsp ucc-rsp messages transmitted

ucd UCD messages received

<cr>

The dynsrv keyword displays Dynamic Service Add or Dynamic Service Delete messages during

the off-hook/on-hook transitions of a phone connected to the Cisco uBR900 series.

Contents

Main Configuring the Cisco uBR900 Series Cable Access Routers Feature Overview Cisco IOS Software Feature Sets Base IP Bridging Home Office (Easy IP) Small Office Tel e c o m mu t e r Data Operations Operating Modes Data Specifications Service Assignments Downstream and Upstream Data Transfer Bridging Applications Routing Applications Layer 2 Tunneling Protocol Easy IP Dynamic Host Configuration Protocol (DHCP) Server Network Address Translation and Port Address Translation (NAT/PAT) Voice Over IP Operations Page H.323 Protocol Stack SGCP Protocol Stack Voice Specifications Backup POTS Connection Security Features DOCSIS Baseline Privacy IPSec Network Security Triple Data Encryption Standard Page Configuration Options Initial Power-On Sequence Page Page Basic Troubleshooting Feature Overview 24 Cisco IOS Release 12.0(7)T Basic Troubleshooting Configuring the Cisco uBR900 Series Cable Access Routers 25 Page Event 3Obtain Upstream Parameters Event 4Start Ranging for Power Adjustments Event 5Establish IP Connectivity Event 6Establish the Time of Day Event 7Establish Security Event 8Transfer Operational Parameters Event 9Perform Registration Event 10Comply with Baseline Privacy Event 11Enter the Maintenance State Benefits Restrictions Related Features and Technologies Related Documents Supported Platforms Prerequisites Supported MIBs and RFCs Page Page Configuration Tasks Configuring a Host Name and Password Verifying the Host Name and Password Configuration, Verification, and Troubleshooting Tips Configuring Ethernet and Cable Access Router Interfaces Verifying IP Address Configuration Configuration, Verification, and Troubleshooting Tips Configuring Routing Configuring Routing 40 Cisco IOS Release 12.0(7)T Verifying Routing Configuring Bridging Configuring Bridging Step Command Purpose 42 Cisco IOS Release 12.0(7)T Verifying Bridging terminals you want to configure. Reestablishing DOCSIS-Compliant Bridging Verifying DOCSIS-Compliant Bridging Customizing the Cable Access Router Interface Using Multiple PCs with the Cable Access Router Configuration Examples Basic Internet Access Bridging Configuration Basic Internet Access Routing Configuration Configuring the Cisco uBR900 Series Cable Access Routers 47 Basic Internet Access Routing Configuration Note To configure the Cisco uBR900 series to act as a router, the no cable-modem compliant Multicast-Enabled Routing Configuration VoIP Bridging Configuration Using H.323v2 Configuring the Cisco uBR900 Series Cable Access Routers 49 VoIP Bridging Configuration Using H.323v2 VoIP Routing Configuration Using H.323v2 NAT/PAT Configuration Configuring the Cisco uBR900 Series Cable Access Routers 51 NAT/PAT Configuration VoIP Bridging Configuration Using SGCP To configure this application via DHCP, the following fields must also be set: IPSec Configuration IPSec Configuration Note Encryption/decryption is subject to export licensing controls. To support IPSec, the Note Careful address assignment on user equipment and policy routing at the headend is required. 54 Cisco IOS Release 12.0(7)T L2TP Configuration Note Encryption/decryption is subject to export licensing controls. To support L2TP and Firewall, Note Careful address assignment on user equipment and policy routing at the headend is required. L2TP Configuration Configuring the Cisco uBR900 Series Cable Access Routers 55 Command Reference cable-modem compliant bridge Page cable-modem downstream saved channel Page cable-modem fast-search Page cable-modem upstream preamble qpsk Page cable-modem voip best-effort Page interface cable-modem Page show bridge cable-modem Page show controllers cable-modem show controllers cable-modem 72 Cisco IOS Release 12.0(7)T Following is sample output for the show controllers cable-modem 0 command: Page Page Page Page show controllers cable-modem bpkm Page show controllers cable-modem des Configuring the Cisco uBR900 Series Cable Access Routers 79 show controllers cable-modem des No default behavior or values. Privileged EXEC DES engine registers are displayed in the following example: number Controller number inside the Cisco uBR900 series. Page show controllers cable-modem filters MAC and SID filter information is displayed in the following example: Page show controllers cable-modem lookup-table show controllers cable-modem lookup-table Configuring the Cisco uBR900 Series Cable Access Routers 85 The mini-slot lookup table is displayed in the following example: show controllers cable-modem lookup-table 86 Cisco IOS Release 12.0(7)T Page show controllers cable-modem mac Example 1 If the DHCP server cannot not be reached, the error will look like this in the MAC log: The fields in this display are explained in the section Basic Troubleshooting on page23. Example 2 MAC error log information is displayed in the following example, which is also reported via SNMP: Example 3 Page Page Example 4 Page Page Example 5 Page Table12 describes the fields shown in the display. Page Page Page show controllers cable-modem phy show controllers cable-modem phy 104 Cisco IOS Release 12.0(7)T Physical transmit registers are displayed in the following example: Page show controllers cable-modem tuner Page show dhcp Following is sample output for the show dhcp server command: Table15 describes the significant fields shown in the display. Page show interfaces cable-modem Traffic passing through the cable access router interface is shown in the following example: Table16 describes the significant fields shown in the display. Page Page Table17 describes the fields shown in this display. Table18 describes the counters shown in this display. MIB counters on the cable interface are displayed in the next example: Table19 describes the software MAC address filter information for the cable access router interface. Page Debug Commands debug cable-modem bpkm Page debug cable-modem bridge Page debug cable-modem error Page debug cable-modem interrupts Page debug cable-modem mac Example 1 Example 2 Example 3 Page Page Page debug cable-modem map Page Glossary