Thanks Phil,
Had no idea any images could run from RAM on 2500's. I had always thought it
was the router which controlled whether images ran from RAM/Flash rather
than the IOS having any effect. That's where the hole was for me in the
understanding.
I'll have a play when I get back home.
Cheers again,
Gaz
""Circusnuts"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> >
>
> MZMaker is simply a compression program for images that run from RAM.
Case
> in point- 12.0(8) Enterprise runs from RAM in 2500 series routers. Full
> version is 9,980 KB in size. This makes your hardware requirements 16
> FLASH/ 16 Megs RAM. If you compress the image, it brings the image down
to
> 4,671 KB. Your RAM requirements have not changed because the image
> decompresses when writing into RAM, but you're now free to use an 8 Meg
> FLASH sticks. For my lab requirements, it's been purely economic. Single
8
> Meg sticks are generally around $80 to $90 on Ebay. Lastly- when
> compressed, 11.2(18) Enterprise runs clean on 4 Megs (great shortcut for
the
> 3202 owners).
>
> All the best !!!
> Phil
>
>
> ----- Original Message -----
> From: "Gareth Hinton"
> To:
> Sent: Tuesday, April 10, 2001 5:30 PM
> Subject: Re: Mzmaker [7:46]
>
>
> > 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.
> > > FAQ, list archives, and subscription info:
> > > http://www.groupstudy.com/list/cisco.html
> > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> > > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> > FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
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