Bob
Appreciate the feedback and the info on your set-up. Right now I using
GNS3 with both Windows 7 64bit and Kubuntu 11.10. The CPU usage is
dramatically down thanks to your configuration commands on idle max and
Walleed and others feedback on removing scheduler allocate and tweaking
some other items.
Yesterday I tweaked my GNS3 Windows 7 set-up with idle pc and edited the
base configurations (scheduler) to get things all loaded up. Then logged
into all of the routers to see if my sessions would die after a period
of time and then I left for about 6 hours to go finish building a
physical lab (28XX, 38XX, 3750) with UPS support, etc.
Well when I came back, GNS3 was still running and all of my terminal
sessions (9 of them!) were still up and operational..
However the only odd part that I saw was the serial interfaces.. I don't
know why but those going to the frame-switch in Dynamips wouldn't stay
up, while the points-2-point interfaces were.. I was scratching my head
about that one and am now thinking I may have to recreate the
frame-switch with a router instead?
IOU sounds interesting to boot. Do you have switches configured in it?
Cheers
Joe
On 2/24/2012 7:23 AM, Bob McCouch wrote:
My setup is a Dell Zino HD dual-core box with 4GB of RAM, running
Ubuntu Server 11.04. I use only Dynamips/Dynagen, no GUI and no GNS3.
Keeps the OS very stable and very lightweight (about 130 MB or RAM for
the OS).
I run 3745s with 12.(4)15T14 (latest build for that platform, and also
very close to the current lab version from what I hear). I have not
experienced any issues with devices falling asleep or serial problems.
I also use 2610's for the BB routers in the IPX topology so I don't
have to monkey with the "Eth0" interface identifier on those configs
either. A couple lines of 'sed' customized all the "real" IPX configs
for my virtual lab.
I use an idlemax of 500.
With idlemax at 500 and the correct idlepc for that image, a full IPX
routing topology runs about 40% CPU across both two cores.
The *only* thing I have run into is that Dynamips doesn't like when
you populate the "slot 0" serial cards on that platform. Which I do
because I'm trying to be very close to the IPX port identifiers, so
instead of S0/0/1 I use S0/1. In other words, I just drop the leading
"0/" from their topology. The result is that my lab runs completely
fine, but when I "stop" all the routers in Dynagen, the Dynamips
hypervisor crashes. Which is not really a big deal at that point. If I
don't populate serial cards in "slot 0," I don't have that crash
issue. It doesn't affect my lab work, so I haven't dug in any further
than that.
I use real switches with a 3750 breakout switch and 2x3560 and 2x3550.
I tie all the vRouters to VLAN identifier interfaces on the Ubuntu box
with NIO_linux commands in the .net file, rather than running them
through a Dynagen vSwitch which trunks out. I happened to do it that
way because I also use those VLAN interfaces to tie IOU virtual
routers to the switches.
On Fri, Feb 24, 2012 at 8:21 AM, Waleed Alsherif
<[email protected] <mailto:[email protected]>> wrote:
Hi Joe ,
I would prefer to use 3725 and 2600 in the simulation , where
router 3725 can simulate a switch ( when you add NM-16ESW module )
, it is not really a switch but can support " switchport" commands .
I am using windows XP ( Ram 4 GB / CPU AMD 4x ) and by idlepc it
gets around 20% of CPU .
Also, serial interface works fine but the issue of falling asleep
is coming up occasionally.
Advice: if you have time to spend in preparing GNS3 that would be
good , I have waited 2 weeks long trying to prepare it .
You may also check something called " rednectar GNS3 workbench "
someone prepared a workbench on Ubuntu .
Best Regards
Waleed Abdulfattah Alsherif
IP and Data Network Engineer
CCIE RS (Written) / CCNP / CCNA
Mob. 002-01019556246
________________________________
From: Ben Hughes <[email protected] <mailto:[email protected]>>
To: Joe Danrich <[email protected] <mailto:[email protected]>>;
"[email protected] <mailto:[email protected]>"
<[email protected] <mailto:[email protected]>>
Sent: Friday, February 24, 2012 12:03 PM
Subject: Re: [OSL | CCIE_RS] Dynamips & IPExperts .NET/Labs
Hi Joe,
I found that I was able to get a stable lab using 2961 routers in
dynamips running 12.4(9)T7. The draw back is that there are
certain features that aren't available on older code. The only
routers that will run the latest code are the 7200's. I've found
them to have the falling asleep issue that you mentioned. I
recently spent about 4 days straight trying different IOS versions
and idlepc values but still no dice. I'm persevering with
dynamips as I'm hopefully near the end of the road but if I had my
time again I'd find a way to get hardware. I have wasted
countless hours on issues related to Dynamips/lab setup.
Oh, I found I had to remove the scheduler command from router
configs in order to get a stable setup. Before I did that my
routers were falling over constantly.
I haven't had any issues with serial interfaces.
Hope that helps.
cheers,
Ben.
From: Joe Danrich <[email protected]
<mailto:[email protected]><mailto:[email protected]
<mailto:[email protected]>>>
Date: Thu, 23 Feb 2012 22:18:42 -0800
To: <[email protected]
<mailto:[email protected]><mailto:[email protected]
<mailto:[email protected]>>>
Subject: [OSL | CCIE_RS] Dynamips & IPExperts .NET/Labs
Hi Guys
I followed with interest the various conversations of Dynamips. I am
using Dynamips with GNS3 on Kubuntu/Ubuntu 11.10 Linux, with the
IPExperts labs I have some questions on how people are running some of
the labs like VOL1 with GNS3?
Have you encountered issues with serial interfaces not coming up and
staying up with or without a clockrate applied to the applicable
serial
interface?
Routers falling asleep even though the IdlePC, Idlemax idlepc are
appropriately set and overall CPU usage is approximately 60% with all
devices active?
What IOS's are people using? AIS or AES?
cheers
Joe
_______________________________________________
For more information regarding industry leading CCIE Lab training,
please visit www.ipexpert.com <http://www.ipexpert.com>
Are you a CCNP or CCIE and looking for a job? Check out
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http://onlinestudylist.com/mailman/listinfo/ccie_rs
_______________________________________________
For more information regarding industry leading CCIE Lab training,
please visit www.ipexpert.com <http://www.ipexpert.com>
Are you a CCNP or CCIE and looking for a job? Check out
www.PlatinumPlacement.com <http://www.PlatinumPlacement.com>
http://onlinestudylist.com/mailman/listinfo/ccie_rs
_______________________________________________
For more information regarding industry leading CCIE Lab training,
please visit www.ipexpert.com <http://www.ipexpert.com>
Are you a CCNP or CCIE and looking for a job? Check out
www.PlatinumPlacement.com <http://www.PlatinumPlacement.com>
http://onlinestudylist.com/mailman/listinfo/ccie_rs
_______________________________________________
For more information regarding industry leading CCIE Lab training, please visit
www.ipexpert.com
Are you a CCNP or CCIE and looking for a job? Check out
www.PlatinumPlacement.com
http://onlinestudylist.com/mailman/listinfo/ccie_rs
