Installation guide

A-4
Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Appendix A Configuration Register Information for the Cisco uBR7100 Series Universal Broadband Routers
Configuration Bit Meanings
Bit 8
Bit 8 controls the console Break key. Setting bit 8 (the factory default) causes the processor to ignore the
console Break key. Clearing bit 8 causes the processor to interpret Break as a command to force the
system into the bootstrap monitor, halting normal operation. A Break can be sent in the first sixty
seconds while the system reboots, regardless of the configuration settings.
Bit 10 and Bit 14
Bit 10 controls the host portion of the Internet IP broadcast address. Setting bit 10 causes the processor
to use all zeros; clearing bit 10 (the factory default) causes the processor to use all ones. B it 10 interacts
with bit 14, which controls the network and subnet portions of the IP broadcast address. Table A-4 shows
the combined effect of bit 10 and bit 14.
Note The console line rate on Cisco universal broadband routers is fixed at 9600 and cannot be changed. For
additional information about configuring baud rates, refer to oneor more of these documents on
Cisco.com:
• “Configuring the CMTS for the First Time” in the Cisco uBR7100 Series Software Configuration
Guide:
http://www.cisco.com/en/US/products/hw/cable/ps2211/
products_configuration_guide_chapter09186a00801b3506.html
Bit 11 and Bit 12
Bit 11 and Bit 12 in the configuration register determine the baud rate of the console terminal. Table A-5
shows the bit settings for the four available baud rates. (The factory set default baud rate is 9600.)
Table A-4 Bit 10 and Bit 14 Settings
Bit 14 Bit 10 IP Address (<net> <host>)
Off Off <ones><ones>
Off On <zeros><zeros>
On On <net><zeros>
On Off <net><ones>
Table A-5 Bit 11 and Bit 12 Settings
Baud Bit 12 Bit 11
9600 0 0
4800 0 1
2400 1 1
1200 1 0