Cisco WS-C4003-RF Hardware Maintenance Manual - Page 121

to use all zeros; clearing bit 10 the factory default causes the processor to use all ones. Bit 10

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Virtual Configuration Register Settings 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 60 seconds while the system reboots, regardless of the configuration settings. Bit 10 controls the host portion of the Internet 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 B-4 shows the combined effect of bits 10 and 14. Table B-4 Configuration Register Settings for Broadcast Address Destination Bit 14 Bit 10 Address ( ) Off Off Off On On On On Off Bit 13 determines the server response to a bootload failure. Setting bit 13 causes the server to load operating software from ROM after five unsuccessful attempts to load a boot file from the network. Clearing bit 13 causes the server to continue indefinitely to attempt loading a boot file from the network. By factory default, bit 13 is cleared to 0. Bits 11 and 12 in the configuration register determine the baud rate of the console terminal. Table B-5 shows the bit settings for the four available baud rates. (The factory-set default baud rate is 9600.) Table B-5 System Console Terminal Baud Rate Settings Baud Bit 12 Bit 11 9600 0 0 4800 0 1 1200 1 0 2400 1 1 Cisco 4000 Series Virtual Configuration Register B-5

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Cisco 4000 Series Virtual Configuration Register
B-5
Virtual Configuration Register Settings
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
60 seconds while the system reboots, regardless of the configuration settings.
Bit 10 controls the host portion of the Internet 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 B-4 shows the combined effect of bits 10 and 14.
Table B-4
Configuration Register Settings for Broadcast Address Destination
Bit 13 determines the server response to a bootload failure. Setting bit 13 causes the server to load
operating software from ROM after five unsuccessful attempts to load a boot file from the network.
Clearing bit 13 causes the server to continue indefinitely to attempt loading a boot file from the
network. By factory default, bit 13 is cleared to 0.
Bits 11 and 12 in the configuration register determine the baud rate of the console terminal.
Table B-5 shows the bit settings for the four available baud rates. (The factory-set default baud rate
is 9600.)
Table B-5
System Console Terminal Baud Rate Settings
Bit 14
Bit 10
Address (<net> <host>)
Off
Off
<ones> <ones>
Off
On
<zeros> <zeros>
On
On
<net> <zeros>
On
Off
<net> <ones>
Baud
Bit 12
Bit 11
9600
0
0
4800
0
1
1200
1
0
2400
1
1