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GNS3 is the way to go.Moreover, Switching (earlier there were workarounds available ) which was previosuly unavailable in GNS3 is about to be introduced. Packet Tracer is good for CCNA only. Another option is to try IOU (which is used by Cisco Engineers for Design and Testing), and uses less system resources than GNS3. However, GNS3 comes very handy to Test new requirements / scenarios at work, since it can be used for Juniper Routers and Servers as well. I hope this helps.
People who are new to this field and they want to clear there concepts and they want to perform some experiments, they is the best place for them.
GNS3 is much better than Packet Tracer, when you want to perform advance level of routing, then GNS3 is the best.
But for new commers, I think Packet Tracer is cool. It has so many features, like we can use routers, switches, PC, Servers, WIFI, IPTV & etc. We can create AAA Server, web server, email server, just to clear the concept. It is a very good tool for the youngsters.
I will suggest Cisco packet tracer.because its resource and study on Cisco materials are available and alos simulation is easy due to its command and most of the user use it.thats why its easy familiar to everyone.SO Cisco packet tracer is the best for simulation.
For beginers (like CCNA studies) Packet Tracer is good but for advanced labs I would suggest GNS3
Because most of the advanced labs and commands are not supported by Packet Tracer.
most definitely GNS3.
hi. bekhouche Liamin
offcourse GNS3, it is far more advance than packet tracer. you can even use it with live devices and it can also has the ability to take you to internet. also just to share with you cisco is also launching their vrtual lab known as
VIRL (Virtual Internet Routing Lab)
packet tracer is cisco's simulator of Cisco IOS and is ideal for practice Labs, but is lacking the support of some cmds.
GNS3 is a hardware and complex network emulator ,Emulation is possible for a long list of router platforms and PIX firewalls. but it has limitations in emulating switches therefor it emulates etherswitch cards integrated in routers to give us the switch emulation but at the degree of cards supported functionalities.
hence think of using packet tracer first, and in some situations switch to GNS3.
best regards
ghenimi.
Well both GNS3 and Packet Tracer have some advantages and some disadvantages.
Packet Tracer
Packet Tracer is by Cisco and still they are under developing.So many things are yet not supported by Packet Tracer,Some of the disadvantages are:
a. You will see very limited commands supported by Packet Tracer
b. Packet Tracer doesn't support iBGP yet now
c. If you configure OSPF using Packet Tracer you may experience some troubles with LSU update.
However, Packet Tracer is good for beginners and two major advantages are:
a. Packet Tracer is light and doesn't require much resource(CPU and memory)
b. Packet Tracer has some built-in Switch like as2950 and2960.SO you can configure switches
GNS3
The most advantages of GNS3 are:
a. Robust software and most of the commands are supported.It's like real router/switch almost.
b. For higher/advanced level configuration whereas you can't use Packet Tracer there you can practice by GNS3 like BGP,OSPF,EIGRP
GNS3 have some disadvantages:
a. It requires much resources(CPU,Memory etc).If you don't choose appropriate IDLE PC settings then your computer CPU will rise up to100% within a minute.It is one of the major disadvantage for GN3
b. By default, you will not get Switch IOS in GNS3.And for other routers you have to download IOS.
c. The configurations will not be saved into startup even if you type 'write memory' or 'copy run stratup'.You can save into a text file or you can use as a project.
However, even GNS3 has one major disadvantage but I still prefer GNS3 because the lab and configuration I need to practice only GNS3 supports it.Packet Tracer is still not developed like as GNS3.
GNS3 you can find all new tools and you can test router type with out buy it
ccna basic you just go through with the packet tracer 5.2 or5.3 for switching . if you going to advance and havier then use gns3 for complete routing and switching practice .