Well Bob, with me being a tinkerer I wanted to find out if I could get
this same set-up to run better on Ubuntu and get away from the issues I
am seeing with the Frame-Switch on Windows 7, I loaded up Ubuntu 11.10
to give it a shot..
So far it "seems" okay, but not what I would prefer. I haven't started
banging on it yet. However I did notice the the packages for Dynamips &
GNS are behind in the repositories, which isn't preferred as the most
recent BETA2 that is on the site. I tried to get the most recent BETA2
to work, but that didn't happen and am now searching for instructions
for installing it.
The version of GNS I do have installed with Dynamips is shows up as
0.7.4 while the latest is 0.8.2 BETA2. There instructions for upgrading
with Linux X64 aren't real clear and so far no luck in getting this to
run.. ugh!
Ciao
Joe
On 02/26/2012 11:03 AM, Bob McCouch wrote:
Hi Joe,
Glad to hear you were able to make some ground in stabilizing your setup.
I've still not experienced any issues with the Dynamips frame switch,
but I don't see any harm in building your own.
I have tried the L2IOU switching image, and the one that can sometimes
be seen "in the wild" is really bad. I really hope the image used in
the TS section is more stable and works better than the older one that
has been seen on the Internet. The "regular" IOU images can be OK but
I do like Dynagen better where it can be used.
Sent from my iPad
On Feb 26, 2012, at 12:47 PM, Joe Danrich<[email protected]> wrote:
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
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<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
_______________________________________________
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
