From: ISolveSystems (support@isolvesystems.com)
Date: Fri Oct 19 2007 - 07:28:40 ART
I am using Ubuntu, which works great.
On 10/16/07, Farhan Anwar <farhan.anwar@gmail.com> wrote:
>
> Hi all,
> I have been preparing for the lab for 6 months using my desktop: Core2Duo,
> with 2Gig + Windows 2003. But the performance was severe and i was not
> able
> to complete the labs without adding another Pentium D 2.66 with 1Gig to
> the
> rescue.
>
> After my post for a help on GS, i was directed to Linux. I was so
> desperate
> that i switched instantly using another spare harddisk into my Core2Duo
> System.
>
> I have installed Fedora-Core 6 + its development Libraries + GDE(just for
> fun).
>
> I have started my 2 Dynamips instances and placed the server in init-level
> 3
> (multiuser text mode) to save memory and resources required for switching
> to
> GUI Mode. No Kernel Modifications as i donot want to spend time on that,
> if
> its worth-it do tell me.
>
> I have all my Dynagen Configuration files onto my Laptop running Windows
> XP,
> in the configuration i changed nothing but the following:
> 1. IP Addresses and Dynamips Server Ports that were assigned to Linux.
> 2. Working Directory Paths from C:\ccie\....... to \ccie\.... ( this
> directory i made on my linux system)
> 3. Re-calculated the IDLEPC Values for all of the IOSes which i was using.
> 4. Copied any existing data to Linux using WinSCP.
>
> Now about the Performance Experience.
> 1. Startup Performance: I have seen a considerable speedup in loading of
> routers when i issue start /all command. In windows occasionally my
> dynamips
> got crashed when i issue start /all so i had to start all routers
> one-by-one. but no crashes in linux have been experienced so far.
>
> 2. Number of Instances: Previously i was able to run only 6 Instances of
> 3640 with Full Load (IGP + EGP + Redistribution + Authentication + L2) on
> which the CPU will touch 90 - 100%. Now on the same load its under 50%. I
> did ran the exact same lab with same config. which means i can run more
> instance as required.
>
> 3. Response: Previously since my cpu load was 100% i got a very slow
> terminal response from routers such as on show run but on linux it flies.
> I
> use SecureCRT on Windows to get into router consoles.
>
> 4. Scenario Loading: I use mmap = true and ghostios = true also. When i
> started my dynagen config the PC took a while loading the scenario,
> starting
> stopping ghost images etc.. but on Linux it does the same with much more
> speed and i get the console prompt almost instantly.
>
> 5. Memory Usage: I use 3640 + 128M RAM and 3620 + 64M RAM normally. But my
> Windows System did more swapping then this linux one. Linux always had
> 500M
> available while windows were on 100M. I guess Windows memory management is
> the problem there.
>
> 6. Performance Issues: I did noticed that my EIGRP neighbor relationships
> kept failing, OSPF enabled routers made adjacencies in a while due to high
> load of CPU but now it works fine with Linux.
>
> I have also read somewhere that FreeBSD would be more efficient than Linux
> and i do have experience on it but i dont have time to try FreeBSD. If
> someone already has please post your comments about it.
>
> I need a solution to the Terminal like SecureCRT in Linux. Because if i
> switch my Windows XP to Linux which one should i use. so if anyone has
> some
> comments do post about it.
>
> Thanks to Scott Vermillion for directing me to Linux and the Brians of IE
> for making it so easy to start with Dynagen / dynamips as a beginner on
> Windows. And most importantly thanks to Chris and Greg for such a nice
> product.
>
> --
> Farhan Anwar
> MCSE, CCNP, JNCIA
> www.farhananwar.com
>
> _______________________________________________________________________
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