From: Roman Rodichev (roman@iementor.com)
Date: Fri Oct 19 2007 - 09:49:21 ART
Yes
Roman Rodichev
5xCCIE #7927 (R&S, Security, Voice, Storage, Service Provider)
Instructor, Content Developer
ieMentor Corporation http://www.iementor.com
Y!M: roman7927
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
subodh.rawat@wipro.com
Sent: Friday, October 19, 2007 5:53 AM
To: support@isolvesystems.com; farhan.anwar@gmail.com
Cc: ccielab@groupstudy.com
Subject: RE: My Dynamips experience on Linux
Does Redhat linux work equally well?
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ISolveSystems
Sent: Friday, October 19, 2007 3:59 PM
To: Farhan Anwar
Cc: Cisco certification
Subject: Re: My Dynamips experience on Linux
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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