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Router memory

Posted on 2005-04-01
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can someone pls tell me why, when you look up the memory on a Cisco router, you get "28672K/4096K bytes of memory".......and I know that you add them up to get the memory, so in this case it's 32 MB of memory, but why is it split up?
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Question by:dlitty7
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JasonKostempski earned 200 total points
ID: 13685604
The first number represents primary memory and the second number represents shared memory.
From: http://www.cisco.com/en/US/products/hw/gatecont/ps2250/products_installation_guide_chapter09186a00800872a1.html
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by:dlitty7
ID: 13688154
thx dude, you rock!
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by:dlitty7
ID: 13688781
The first number represents primary memory and the second number represents shared memory.
 ok, but what about the FLASH memory that's listed under SHOW VERSION also, it should be the last line of output.........how is "shared memory" different from the "flash"?

I've already given the points, just thought I was add more here to clarify :)
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by:JasonKostempski
ID: 13713011
FLASH memory is where the system code is stored, this is the code that tells the system how to boot up.  Without it the system would go no where when it was turned on.  All computer systems have, and need, code stored in the FLASH memory. Google: "BIOS" (Basic Input/Output System) and you'll find a googleplex of sites explaining it.  As far as exactly how shared memory works, it's a little beyond me but I came across this site while I was looking for the answer:

http://www.cs.cf.ac.uk/Dave/C/node27.html

Might be fun to read.  You could also Google: "Shared Memory"

Gotta watch 'Scrubs' now.

Peace!
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by:dlitty7
ID: 13716644
THanks alot for the additional clarification!!  I would watcch "scrubs" too, if I had the time :)  I'm just too busy....again, thx!
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