7200emu.hacki.at

[hensome2004]

Hi all,

I am using GNS3 as a CCNA simulator for configuring Catalyst 2960 and prepare for the exam. I understand that it does not directly support Cisco switch simulation, but rather use the NM-16ESW module for 2960 simulation.

The problem is that where can I download the IOS image for this? Is there any one who can successfully use GNS3 to simulate 2960? Please share your experience here, (including where to find the relevant information for the setup).

Thanks.
Henry

[MaxOD]

Yes! You use either the 7200 router ios, loaded with the 16em module. It has all of the vlan commands hidden. As this is a layer 3 device capable of routing ands swithing....

[thumpercisco]

could you post your .net using the 7200 IOS with NM-16ESW module in a slot please, and works when the lab is run.

[ccie14745]

To support the NM-16ESW, you will have to have a 2600/3600/3700 series router. I recommend the following image and idlepc value, which has worked well for me:

c3725-ipbasek9-mz.124-21.bin = 0x6127034c

The newer the IOS image, the more likely you are to have ESW bugs fixed. I recently switch from using c3620-is-mz.123-21.bin to the c3725 image above after trying to load up about 10 routers acting as switches and getting issues with STP that were only solved with the code upgrade.

C7200 series routers don't offer a switch module that you can use, although there are some 8-port ethernet port adapters that could be used for ports (just not switch ports, unless you want to learn IRB and CRB ).

[cyberadmin]

imm..
how about with this image c3550-ipbasek9-mz.122-25.SEE4.bin

[ccie14745]

That image is for the Catalyst switches, which Dynamips will not support.

[cyberadmin]

sorry..
wrong paste img name..
i mean this
c2600-advsecurityk9-mz.124-17.bin

if this img can,,plz advice me how to set it up like a switch ..

thz.

[ccie14745]

As I said, most newer 2600 images would apply. You need add a NM-16ESW module. Here's a sample .NET file I created to play with switching scenarios:

[cyberadmin]

yeah.! it work..
but i don't know how to config vlan..
it does'nt like cisco catalyst 2960 switch series...
can't use
in glo config mode ' vlan vlan-id' to creat new vlan
'show vlan brief' in priv Exec mode
'switchport port-security' in inter subcomm

i think i can creat new vlan with 'vlan database' comd instead of 'vlan vlan-id' comd
i use c2600-advsecurityk9-mz.124-17.bin image
what do u think..

can i add (connect )remote host's NIC (different subnet with my NIC) to emulated routers interf


thz 4 ur reply ccie14745..

[ccie14745]

So, not all the commands are the same. Use "show vlan-switch brief" instead of "show vlan brief". Also, I would recommend upgrading your IOS version to the latest 12.4T release supported (probably 12.4(15)T8, last I looked). You'll find support for port security becomes available, as does configuring VLANs in config mode instead of the "vlan database".

[cyberadmin]

i've change my IOS to
c3725-adventerprisek9-mz.124-15.T8.image
but i think it still not include port security feature..
and some of vlan feature command is not inclu

[ccie14745]

There's certainly limitations, as you're discovering. For example, the implementation of port security does not use the "switchport port-security" command:

Configuring the MAC Table to Provide Port Security

There's a lot of features not available, many of which are specified in a list on that web page. If you really need things like PVLANs, BPDUFilter, VACLs, and all the other things not supported, I suggest you buy real switches. There's not any way to practice those things using Dynagen.

[memoonamike]

Thanks for providing the suggestions and for giving kind replies.

[ciscotrainer]

What I feel is, for Cisco CCNA or CCNP Routing part GNS3 is the best option under the sun. But for Cisco CCNA or CCNP Switching part, you have to rely on real Cisco Switches, currently.

Hope GNS3 developers can find a solution for this soon...