I used GNS for most of my CCNP prep although I used 4 switches for the SWITCH exam. If you cannot use real switches, look into renting rack time.
Optimizing your idle-pc value is key to getting GNS to work. Likewise, you need a GNS friendly router. For me, the 3725 works best. I have always had problems with the 2600's.
You could also consider building a physical lab, I have the TSHOOT setup at home. GNS3 is great but I prefer to use real kit aswell to see how stuff reacts when you configure it.
My wife complains like mad when everything is on with the fans howling, and it's not exactly friendly on the electricity bill More fun than dragging icons around though.
Sorry Guys , I was busy in some other stuff, couldn't get back on disscusion.
I am back now. Here is my conceren.
1st. I really wanna work on real gears, bcoz GNS3 crashes during practice which is very annoying. Yes I tried idle pc and all that stuff but no luck to fulfill the need.
2nd. As I was looking for cisco routers and switches on ebay
**I got one 3550-24-SMI new open box (sort of bran new 100% working). I have upragded it to EMI with help of CNA 5.6.
**I got one 2611xm 128D/32F with 1 WIC-2t serial.
At present I have only 2 devices as I have mentioned above.
My aim is to perform all CCNP labs & stuff. Please suggest me .
I just didn't win 2 bids on ebay for brand new items ( New 2960-TT-L switch and 1811-K9) router
Yeah it's frustrating buing kit off Ebay...you have to be really thorough while reading the ads to make sure you know exactly what you are buying, there are a lot of scammers on there. I've never had any trouble with GNS3 crashing, my big concern is trusting that the simulation will act exactly as a real router would as I've had some odd results when doing PBR.
My lab now consists of;
IP Phones and some WLAN kit is next on my shopping list, I'm also in the process of building a couple of servers.
I have tried 2600 same as you have done and mentioned that you had issues. I didn't go further bcoz I thought if 2600 is not working, higher models shouldn't work too.
Other side my laptop heats up like "tea cattle". I ll try again and let you know if I see any issues.
Thanks Indeed for you concern.
Hot is good for Winter, right?
Generally, running GNS3 on laptops might not be good idea, unless your have i5 or i7; your Mobile Dual Core 2.51 GHz should pull some GNS routers; how many? not sure.
Stop all unecassary processes;
exclude Antivrus scanning for GNS3 folder and files, Cisco IOS, etc
what is your CPU usage with just 1 gns3 rotuer?
How much free RAM u got? Before running gns and with?
2600s and 3725s routers are OK for gns, just have to find a good image that runs well (not all do and must be uncompressed);
see tips and tricks for gns3: https://learningnetwork.cisco.com/thread/23445