Performing Other Configuration Tasks

Bit 10 of the software configuration register controls the host portion of the IP broadcast address. Setting bit 10 causes the processor to use all zeros in the host portion of the IP broadcast address; 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 IP broadcast address.

Table 4-6 shows the combined effect of bits 10 and 14.

Table 4-6

 

Software Configuration Register Settings for Broadcast Address

 

 

Destination

 

 

 

 

Bit 14

Bit 10

Address (net) (host)

 

 

 

 

Off

Off

(ones) (ones)

 

 

 

 

Off

On

(zeros) (zeros)

 

 

 

 

On

On

(net) (zeros)

 

 

 

 

On

Off

(net) (ones)

 

 

 

 

Bits 11 and 12 of the software configuration register determine the line (baud) rate of the console terminal. Table 4-7 shows the settings in this register that equate to the four available console baud rates. The factory default transmission rate for the console terminal is 9600 baud.

Table 4-7

Console Baud Rate Settings

 

 

 

 

Baud Rate

Bit 12

Bit 11

 

 

 

 

9600

0

0

 

 

 

 

 

4800

0

1

 

 

 

 

 

1200

1

0

 

 

 

 

 

2400

1

1

 

 

 

 

 

Bit 13 of the software configuration register determines the system’s response to a bootload failure. Setting bit 13 causes the system to load Cisco IOS software from Flash memory after five unsuccessful attempts to load a boot file from the network TFTP server. Clearing

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