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| I was practicing for the exam and i have answers that look contradictory
Q.) What is the default startup sequence of locations where a Cisco router will look for the IOS configuration?
A.)NVRAM, Flash, TFTP server, ROM
Q.)Where do routers look first for IOS software by default?
A.)Flash
I thought the routers looked for IOS image by default in the NVRAM | |
| Sexy Lexy 2004-05-03, 5:45 pm |
| The system bootstrap software (boot image) executes and searches for a valid Cisco IOS software image.
The source of the Cisco IOS software image (Flash memory or a Trivial File Transfer Protocol (TFTP) server) is determined by the configuration register setting.
The factory-default setting for the configuration register is 0x2102, which indicates that the router should attempt to load a Cisco IOS software image from Flash memory.
When a valid Cisco IOS software image is found, the router boots the software.
Remember that on the 2500 series, the Cisco IOS software image runs from Flash memory.
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| So the first answer is wrong and the second answer is right ??? | |
| repentantvoter 2004-05-03, 9:10 pm |
| quote:
http://www.cisco.com/en/US/products....shtml#boot-seq
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The system bootstrap software (boot image) executes and searches for a valid Cisco IOS software image. The source of the Cisco IOS software image (Flash memory or a Trivial File Transfer Protocol (TFTP) server) is determined by the configuration register setting. The factory-default setting for the configuration register is 0x2102, which indicates that the router should attempt to load a Cisco IOS software image from Flash memory.
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When a valid Cisco IOS software image is found, the router boots the software (remember that on the 25xx, the Cisco IOS software image runs from Flash memory)
...
Quite impressive indeed!! I wish I had such a wonderful photographic memory too, I could become a CCIE in a few months! 
Mr. FMZ, I believe you are correct. It seems to me the IOS is never stored in NVRAM, so the answer to the first question appers to be wrong. And I believe by default any router will search for the IOS in the flash memory first. But I just started my studies, so I may be wrong!  | |
| Sexy Lexy 2004-05-04, 2:44 pm |
| Didn't quote from memory, never said I did either.
The configuration register setting of 0x2102 denotes loading the Cisco IOS software image from Flash memory.
Which is the default.
The post was to clarify the situation.
Nice to see that when you help people still have to say something. | |
| repentantvoter 2004-05-04, 7:15 pm |
| quote:
Originally posted by Sexy Lexy
Didn't quote from memory, never said I did either.
The configuration register setting of 0x2102 denotes loading the Cisco IOS software image from Flash memory.
Which is the default.
The post was to clarify the situation.
Nice to see that when you help people still have to say something.
I apologize, sir, I did not mean to say that you quoted without giving credit, I hope I did not offend you!  | |
| Sexy Lexy 2004-05-04, 7:16 pm |
| No offence taken, no need to apologise.
It does show character though.
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| Sexy Lexy 2004-05-04, 7:25 pm |
| It is easily done on a forum as posts are generally impersonal.
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| victorj 2004-05-10, 11:58 pm |
| My understanding is that the setup sequence though set by the bootfield will look first to nvram to see if a "boot-sytem" command has been executed. If not then it falls back to the bootfield sequence.
Therefore both answers could be right.
Juan |
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