Cisco 7500 Series Configuration Manual page 154

Configuring the Software Configuration Register
Table 4-3
Action/Filename
Bootstrap mode
Default software
cisco2-RSP
cisco3-RSP
cisco4-RSP
cisco5-RSP
cisco6-RSP
cisco7-RSP
cisco10-RSP
cisco11-RSP
cisco12-RSP
cisco13-RSP
cisco14-RSP
cisco15-RSP
cisco16-RSP
cisco17-RSP
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 the Break key as a command to force
the system into the bootstrap monitor, thereby halting normal operation. Regardless of the setting of the
break enable bit, a break will cause a return to the ROM monitor during the first few seconds
(approximately 5 seconds) of booting.
Bit 9 is unused. Bit 10 controls the host portion of the 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. Bit
10 interacts with bit 14, which controls the network and subnet portions of the broadcast address.
Table 4-4
Table 4-4
Bit 14
Off
Off
On
On
Bit 11 and bit 12 in the configuration register determine the data transmission rate of the console
terminal.
transmission rate is 9600.)
Cisco 7500 Series Installation and Configuration Guide
4-6
Default Boot Filenames
shows the combined effect of bit 10 and bit 14.
Configuration Register Settings for Broadcast Address Destination
Bit 10
Off
On
On
Off
Table 4-5 shows the bit settings for the four available rates. (The factory-set default data
Chapter 4 Performing a Basic Configuration of the System
Bit 3 Bit 2
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
1 0
1 0
1 0
1 0
1 1
1 1
1 1
1 1
Address (<net> <host>)
<ones> <ones>
<zeros> <zeros>
<net> <zeros>
<net> <ones>
Bit 1 Bit 0
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
OL-5008-03 B0