Thanks for the reply Brian.
Is it just the fact that the image is compressed which makes the router run
from RAM or is there some other config change?
Cheers,
Gareth
""Brian Dennis"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Gareth,
> I use it to enable my 2500s to run the image from RAM as opposed to flash.
> The largest image I was able to get working with 16 megs of RAM in the
> router was about a 13 meg IOS image before compression. Anything larger
than
> about 13 megs won't boot. I haven't tried it but theoretically you could
run
> this image without any flash at all if you booted the image from a TFTP
> server. One of the drawbacks is that the router isn't left with a lot of
> memory to use for it's processes (see 'sho mem' below) so I wouldn't
> recommend using this in a production environment but in a lab environment
it
> isn't usually an issue.
>
> Brian Dennis
> CCIE #2210 (R&S)(ISP/Dial)
> CCSI #98640
>
>
> [root@FW1 bdennis]# ls -l c2500*
> -rw-rw-r-- 1 bdennis bdennis 5861550 Apr 2 18:10
> c2500-jos56i-l.120-4.T.Z
> -rw-rw-r-- 1 bdennis bdennis 12699926 Apr 2 14:06
> c2500-jos56i-l.120-4.T.bin
> [root@FW1 bdennis]#
>
>
> R2#sho ver
> Cisco Internetwork Operating System Software
> IOS (tm) 2500 Software (C2500-JOS56I-L), Version 12.0(4)T, RELEASE
SOFTWARE
> (fc1)
> Copyright (c) 1986-1999 by cisco Systems, Inc.
> Compiled Wed 28-Apr-99 21:02 by kpma
> Image text-base: 0x0000144C, data-base: 0x00B63958
>
> ROM: System Bootstrap, Version 11.0(10c)XB1, PLATFORM SPECIFIC RELEASE
> SOFTWARE (fc1)
> BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c)XB1,
> PLATFORM SPECIFIC RELEASE SOFTWARE (fc1)
>
> R2 uptime is 21 hours, 46 minutes
> System restarted by reload
> System image file is "flash:c2500-jos56i-l.120-4.T.Z"
>
> cisco 2500 (68030) processor (revision L) with 14336K/2048K bytes of
memory.
> Processor board ID 01486505, with hardware revision 00000000
> Bridging software.
> X.25 software, Version 3.0.0.
> SuperLAT software copyright 1990 by Meridian Technology Corp).
> TN3270 Emulation software.
> 1 Ethernet/IEEE 802.3 interface(s)
> 2 Serial network interface(s)
> 32K bytes of non-volatile configuration memory.
> 8192K bytes of processor board System flash (Read/Write)
>
> Configuration register is 0x2102
>
> R2#sho flash
>
> System flash directory:
> File Length Name/status
> 1 5861676 c2500-jos56i-l.120-4.T.Z
> [5861740 bytes used, 2526868 available, 8388608 total]
> 8192K bytes of processor board System flash (Read/Write)
>
> R2#sho mem
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor CE69FC 1148420 1148420 0 0 0
> I/O E00000 2097152 1345176 751976 682724 722216
>
>
>
> R2#
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> Gareth Hinton
> Sent: Tuesday, April 10, 2001 4:34 AM
> To: [EMAIL PROTECTED]
> Subject: Re: Mzmaker [7:46]
>
>
> Can someone explain how this works then?
>
> Where does the image decompress to? The way I understood it, a compressed
> image which is stored in flash, decompresses to RAM, then runs from there.
> Could 2500's ever Run from RAM? Is this image dependant, I thought a
router
> was either 'run from flash' or 'run from ram'. Can the IOS change that?
> I've used mz images plenty on other routers, but can't find a 2500 image
> that is not .bin.
>
> Any replies welcome - I'm off to look into it myself.
>
> Cheers,
>
> Gareth
>
>
> ""Circusnuts"" wrote in message
> 0f6c01c0c105$035e8fe0$[EMAIL PROTECTED]">news:0f6c01c0c105$035e8fe0$[EMAIL PROTECTED]...
> > Gareth- your half right. MZMaker is for the RUN from RAM routers, which
> is a
> > good portion of the images Cisco supports. I have used MZMaker
> exclusively in
> > the 2500's for the past 2 years (HOMELAB ONLY). It will not work on the
> new
> > 12.1 (2500 Series), run from FLASH images- as you suggest. I'm not sure
> if
> > you have upgraded a lot of routers, via the CCO... but a majority of the
> > images have the MZ designation in the IOS name. Cisco uses the very
same
> > program to compress their images...
> >
> > Phil
> >
> > "Gareth Hinton" wrote in message
> > 9asrpa$is4$[EMAIL PROTECTED]">news:9asrpa$is4$[EMAIL PROTECTED]...
> > > Not convinced!
> > > I must admit I've never used Mzmaker, but surely it's only useful for
> 'Run
> > > from RAM' routers.
> > > Can it be used at all on a 2500?
> > >
> > > Gareth
> > >
> > > ""Bob Timmons"" wrote in message
> > > 9asg22$32a$[EMAIL PROTECTED]">news:9asg22$32a$[EMAIL PROTECTED]...
> > > > How much RAM do you have on this router? If the uncompressed IOS is
> > > greater
> > > > than 8MB, you need 16MB of RAM. Remember, when you compress an IOS
> image
> > > it
> > > > will uncompress into RAM when booting. If you have 16MB of RAM,
maybe
> > try
> > > > re-compressing the original IOS image.
> > > >
> > > > > I have a 2514 w/ 8Mb flash. When I used mzmaker to compress IOS
12
> > that
> > > > is
> > > > > 10MB it worked fine. However, after writing the .mz file to flash
> and
> > > > > starting up the router it keeps looping "Error : memory
requirements
> > > > exceed
> > > > > available memory
> > > > > Memory required : 0x00AF99A0
> > > > >
> > > > > Exception: Software forced crash at 0x111E (PC)"
> > > > >
> > > > > and giving this error. Does this not work since on a 2500 series
> > router
> > > > > the IOS runs in the flash and not ram? Thanks.
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