Configuring Headend Broadband Access Router Features
Configuring and Activating Baseline Privacy
Verifying Upstream Data Backoff Automatic
To verify backoff window settings, enter the show controllers cable 6/0 u0 command for the upstream port you have just configured:
CMTS01# show controllers cable 6/0 u0 Cable6/0 Upstream 0 is up
Frequency 24.016 MHz, Channel Width 1.600 MHz, QPSK Symbol Rate 1.280 Msps Spectrum Group is overridden
SNR 33.2560 dB
Nominal Input Power Level 0 dBmV, Tx Timing Offset 2288 Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (60 ms) Tx Backoff Start 0, Tx Backoff End 4 Modulation Profile Group 1 part_id=0x3137, rev_id=0x03, rev2_id=0xFF nb_agc_thr=0x0000, nb_agc_nom=0x0000
Range Load Reg Size=0x58 Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 8 Minislot Size in Symbols = 64
Bandwidth Requests = 0xFE Piggyback Requests = 0xD Invalid BW Requests= 0x2 Minislots Requested= 0x2963 Minislots Granted = 0x2963 Minislot Size in Bytes = 16 Map Advance = 4000 usecs UCD Count = 32964
DES Ctrl Reg#0 = C000C043, Reg#1 = 0
Troubleshooting Tips
To troubleshoot the configuration, perform the following tasks:
•Make sure the cable connections are not loose or disconnected.
•Make sure the Cisco cable modem card is firmly seated in its chassis slot and the captive installation screws are tight.
•Make sure you entered the correct slot and port numbers when you typed the command.
•Make sure you entered the correct upstream port number:
–On the MC16C cable modem card, this can be u0 to u5.
–On the MC14C cable modem card, this can be u0 to u3.
–On the MC12C cable modem card, this can be u0 or u1.
–On the MC11C cable modem card, this can be u0 only.
Configuring and Activating Baseline Privacy
To encrypt upstream and downstream data, you need to configure and activate baseline privacy. Baseline privacy on an HFC network is configured with key encryption keys (KEKs) and traffic encryption keys (TEKs). The encryption is based on
Cisco IOS Multiservice Applications Configuration Guide
