04-26-2012 04:45 PM - edited 03-04-2019 04:09 PM
I referenced my confreg examples from
http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a008022493f.shtml
My question is, why is 0x2102 the default if you can easily use 0x3922 instead?
The benefit being that your console serial speed is 12 times faster.
Is there more to the confreg values than is written in the guide?
Configuration Register Setting | Router Behavior |
---|---|
0x102 |
|
0x1202 |
|
0x2101 |
|
0x2102 |
|
0x2120 |
|
0x2122 |
|
0x2124 |
|
0x2142 |
|
0x2902 |
|
0x2922 |
|
0x3122 |
|
0x3902 |
|
0x3922 |
|
If the value you have for the configuration register is not in the table, then determine which bits are set in order to compute the value:
Bit Number | Hex | Meaning |
---|---|---|
00-03 | 0x0000-0x000F | Boots Field Parameters:
|
06 | 0x0040 |
|
07 | 0x0080 |
|
08 | 0x0100 |
|
10 | 0x0400 |
|
5,11,12 | 0x0020, 0x0800, 0x1000 |
|
13 | 0x2000 |
|
14 | 0x4000 |
|
15 | 0x8000 |
|
Solved! Go to Solution.
04-26-2012 08:17 PM
Benjamin Ninnemann wrote:
I referenced my confreg examples from
http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a008022493f.shtml
My question is, why is 0x2102 the default if you can easily use 0x3922 instead?
The benefit being that your console serial speed is 12 times faster.
Basically, it's backward compatible from the days when 9600 baud was about all you could push through a serial port for console access.
Yes, you *can* set it higher - but 9600 is a known default, and the first thing any experienced engineer will try if they need console access because they know it's likely to be right in 99.99% of cases.
As for the rest - well, Cisco may have some hidden stuff they don't want us outsiders to know - but who is to tell?
Cheers.
04-26-2012 08:17 PM
Benjamin Ninnemann wrote:
I referenced my confreg examples from
http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a008022493f.shtml
My question is, why is 0x2102 the default if you can easily use 0x3922 instead?
The benefit being that your console serial speed is 12 times faster.
Basically, it's backward compatible from the days when 9600 baud was about all you could push through a serial port for console access.
Yes, you *can* set it higher - but 9600 is a known default, and the first thing any experienced engineer will try if they need console access because they know it's likely to be right in 99.99% of cases.
As for the rest - well, Cisco may have some hidden stuff they don't want us outsiders to know - but who is to tell?
Cheers.
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