Let's see if I can explain some of this without sounding like an idiot -
I remember having to go thru all this when I was updating fields of stuff
for a spreadsheet - the memory 2048/2048 is added together to give you the
4MB of RAM. The first number is installed memory, and the second is shared
memory (meaning - I THINK - on the motherboard preinstalled) - so a 2501
will sometimes give you something like 14000/2048 for a total of 16MB -
NVRAM is also on board - and I think it can be upgraded, but you'll need to
order it from Cisco - I think it's chip memory on most of the boxes. It'd
have to be a pretty mean router config to exceed 32K of text, so it's not a
big deal 99.9 percent of the time.
Flash is 8MB or whatever it says - and you can (and need to) upgrade this if
you go to a higher IOS - sometimes a command like show mem flash helps a
bit.
I suspect the bridging software and x.25 are for bridging protocols and X.25
connectivity. Perhaps there were older versions that were less reliable,
but unless you are bridging traffic or using x.25 (which I hope you'll never
have to do) - this isn't important. Suffice it to say that by 11.2/11.3 -
most of the older technologies should be stable
It's a bit of guesswork - I had to figure this stuff out myself at one time,
and you're right about a lot of books not covering it.
RB
>From: "Niraj Palikhey" <[EMAIL PROTECTED]>
>Reply-To: "Niraj Palikhey" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>CC: [EMAIL PROTECTED]
>Subject: Basic Config question??
>Date: Wed, 05 Jul 2000 10:26:00 EDT
>
>Hi,
>Had a question on the output of a sh ver. command on my 2501 router.
>The memory reads 2048/2048 bytes of memory. The NVRam has 32K of memory and
>the system flash reads 8192K bytes of processor board System flash.
>
>Why does the memory read 2048/2048? Does this mean it had 4MB of total RAM
>but what is the significance of the (/)slash?
>
>Since the startup-config file resides in NVRam, and only the startup file
>is
>in NVRam, is it why it has only 32K of memory? Would I ever need to upgrade
>this?
>
>Regarding flash, does it have it's own 8Mb of memory? Since this is needed
>to load the IOS, will this also ever have to be upgraded depending on the
>ver. of IOS being used?
>
>Also the sh ver. command shows Bridging software and X.25 software ver.
>3.0.0? What is this software and what does it do?
>
>None of the books that I have read explain basic things like this that I
>feel is very important to understand the basics of a router - just like
>understanding the internal components of a pc. Most books go straight into
>configuring routers etc.
>
>
>Please advise.
>Thank you.
>Kind regards,
>[EMAIL PROTECTED]
>
>
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