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]>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]> > To: Joe Danrich <[email protected]>; "[email protected]" < > [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]>> > Date: Thu, 23 Feb 2012 22:18:42 -0800 > To: <[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 > > 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 > _______________________________________________ > 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
