Linksys WCM300 Cisco Cable Wideband Solution Design and Implementation Guide, - Page 80

Troubleshooting Wideband Components Chapter 5 Monitoring and Troubleshooting Wideband Components The ping docsis command uses 1/64-the bandwidth of IP ping-and works with cable modems that have not yet acquired an IP address. This allows cable operators to ping cable modems that are unable to complete registration, that have internal bugs, or that are unresponsive due to a crash. The ping docsis command with the verbose keyword includes a real-time view and plot of requested power adjustments, frequency, timing offset adjustments, and a measure of optimal headend reception power. Router# ping docsis 1.11.0.5 verbose Queueing 5 MAC-layer station maintenance intervals, timeout is 25 msec: Reply from 0014.bfbe.3e3c: 46 ms, tadj=1, padj=0, fadj=34 Reply from 0014.bfbe.3e3c: 46 ms, tadj=0, padj=0, fadj=26 Reply from 0014.bfbe.3e3c: 50 ms, tadj=0, padj=0, fadj=29 Reply from 0014.bfbe.3e3c: 50 ms, tadj=1, padj=0, fadj=29 Reply from 0014.bfbe.3e3c: 50 ms, tadj=-1, padj=0, fadj=39 Success rate is 100 percent (5/5) For more information on the ping docsis command, see the Cisco Broadband Cable Command Reference Guide. Verifying That a Wideband-Capable Cable Modem is Registered as a Wideband Modem To verify that a wideband-capable cable modem is registered as a wideband modem, use the show cable modem command. In the following example, the MAC address of the wideband cable modem is specified. Router# show cable modem 0014.bfbe.3e70 MAC Address IP Address 0014.bfbe.3e70 1.11.0.3 I/F MAC Prim RxPwr Timing Num BPI State Sid (dBmv) Offset CPE Enb C5/0/1/U0 w-online(pt) 1 0.00 1231 0 Y If a wideband-capable cable modem is registered as a wideband modem, the MAC State field will have one of the w-online values (wideband-online), such as w-online(pt) in the preceding example. For descriptions of the complete set of MAC state values, see the show cable modem command in the Cisco Broadband Cable Command Reference Guide. A wideband-capable modem may also register as a DOCSIS 2.0 modem (for example, if a wideband channel is not available). In this case, the MAC State field displayed by show cable modem will not have one of the w-online values. To determine the set of wideband-capable cable modems that have registered as wideband modems on the CMTS, use the show cable modem wideband command. Router# show cable modem wideband MAC Address IP Address 0014.bfbe.3e70 1.11.0.3 0014.bfbe.3e3c 1.11.0.4 0016.92fb.5742 1.11.0.6 0016.92fb.580e 1.11.0.7 0014.bfbe.3eaa 1.11.0.2 0016.92fb.57f8 1.11.0.5 0016.92fb.57f4 1.11.0.8 I/F MAC State C5/0/1/U0 w-online(pt) C5/0/1/U0 w-online(pt) C5/0/1/U0 w-online(pt) C5/0/1/U0 w-online(pt) C6/0/1/U0 w-online(pt) C6/0/1/U0 w-online(pt) C6/0/1/U0 w-online(pt) Prim BG DSID MD-DS-SG Sid ID 1 24 24 N/A 2 24 24 N/A 3 24 256 1 4 24 264 1 7 36 36 N/A 8 36 298 1 9 36 306 1 To determine the set of wideband-capable cable modems that have registered as DOCSIS 2.0 modems on the CMTS, use the show cable modem wideband command with the registered-traditional-docsis keyword. 5-20 Cisco Cable Wideband Solution Design and Implementation Guide, Release 1.0 OL-10705-02