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Posted by on April 25, 2008, 3:12 am
If you were Registered and logged in, you could reply and use other advanced thread options > >I'm getting ready to load a new IOS in my 2611XM that requires 128MB.
> >Show Version indicates that 96MB is installed now.
> >Since 128MB is the minimum recommended RAM, is there any reason to put
> >more in (not running BGP)? =A0For example, one new 128MB DIMM plus leave
> >in 96MB or 64MB, depending on whether one chip or two chips are
> >installed now. =A0
>
> The main thing is that you need a newer boot ROM to handle the 128M
> DIMMs of memory on the 2611XM. I'm sorry, I don't remember the old
> ROM version numbers vs. the newer version numbers, but most of them
> shipped only being able to do 128M, with the new boot ROM very late in
> the product lifetime to support 256M on the 26??XM platform.
>
> Part # BOOT-2600XM-256=3D
>
> http://www.cisco.com/en/US/prod/collateral/routers/ps259/prod_bulleti...
>
> >If I end up with 192MB or more, should I allocate more to packet
> >buffers?
>
> Not going to do much for you to allocate more to IO memory on this platfor=
m.
> Its mostly to run the huge images that started rolling out at the same tim=
e.
> (this platform, like most cisco copies a gzip'd image off of Flash
> into RAM to run from RAM as it boots).
>
> >Edge Tech has a 128MB module for $31.76 =A0This is unbelievably cheap!
> >Has anyone here purchased RAM from these guys? =A0If so, did you have
> >any problems?
>
> Compared to Cisco's memory prices, anybody else is cheap.. :)
> I've used MemoryX the most and have had good service from them.
For $30 its hardly worth it however if time is cheap for you
you could just try the image and see it it works?
In many cases you can reduce the IO memory too.
mem io percent
or something like that.
I believe that IO is allocated at startup and unless
you creat new interfaces is static thereafter.
You could boot over the network if you don't
have room in flash for two images. This will save
some possibly dire xmodem recovery.
Or Dynamips? Not sure if it supports your exact router
but I think I recall that it does support 2600 so it
could all be checked out on a PC first.
I have on several occasions used less that the recommend
min memory and had no problems however I have checked
things out very carefully.
Clearly not for some serious business use but
once the box is up, unless you are using a memory
hungry routing protocol (EIGRP is the classic I understand)
or have huge ARP tables or somehting like that, then
memory is typically not allocated significantly after startup.
I have 7 or 8 play 3600s (Dynamips ones but they are real
enough:) and I am using MUCH less than the 'recommended'
memory since it makes the PC behave a lot better for me.
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