Hi Ali,

Unfortunately there isn’t a simulator or emulator for Cisco’s NX-OS. You’ll need an actual switch running NX-OS if want to test a design or topology.

Cheers!

hi dear friend
im looking for NXOS smulator. could you send the download link to me

You need to read the documentation carefully… you need to set idle pc value for that virtual router.

http://netguide.sakura.ne.jp/gns3/english/idlepc.html

Assuming you’ve done a “write mem” from within the virtual router you need to save the GNS3 project configuration and choose “export” the router configurations.

http://www.blindhog.net/gns3-how-to-save-labs-with-router-configs/

Good Luck!

Editor: I’ve removed your email to prevent SPAM

Hi Glenn,

Thanks for the information…

I was able to figure out the NXOS syntax (wasn’t hard at all) and GNS3 helped prove out the design. A NXOS simulator would be interesting.

Thanks for the comment!

Hi Garrick,

I was going to start playing with QEMU and see if I can get a virtual Linux host up and running on the virtual network, now I just need to find the time.

I ended up doing an export and import everytime I started and shutdown GNS3.

Thanks for the comment!

Hi Flintstone,

I ended up getting burned a little with my upgrade. The Cisco Nexus 7010 switches choked on some of the legacy IOS syntax. I also had to go back and write a prefix-list for the route-maps as opposed to using a simple ACL list. I accidentally stumbled upon GNS3… more so because I didn’t feel like racking all that lab equipment to setup my test. In the end it worked out pretty good.

Thanks for the comment!

Hi Dorian,

I don’t think there’s a market for a product that emulates Avaya/Nortel equipment.

I can understand the limitations of emulating the switch products. I’m not sure if Cisco still spins there own ASICs (hardware) but I believe they do right? I know most of Cisco competitors rely on third party ASCIs from Broadcom and others. Although I believe I’ve heard Juniper is spinning it’s own ASICs for their EX Series switches.

Thanks for the comment!

Unfortunately it can’t be part of dynamips because the Nexus is not mips-based but I have seen it run in vmware successfully.

Glen.

Dynamips is a great emulator, best I’ve seen at least. If you can live with a little delay (got it down to 20 ms per emulated router), you can also connect it to actual hardware such as an 8600 or 5520. With Dynamips some of the switch commands are older, such as creating VLANs (uses vlan database). Packet Tracer has more switch command limitations IMHO, but is also good.

To save your configs, the way I do it is to in the net file point each router’s config line to a text file where you have copied the actual running config. Once you launch Dynamips again, it will load that config file with all of your last saved settings. Similar to where you would write out the config in a text file when loading a new switch/router.

GNS3 also allows me to test our BGP and OSPF WAN configurations in a test environment before going live :)

You can do a little switch emulation by adding a switch module to one of your routers. I also believe Cisco’s packet tracer will also emulate their routers and more importantly their switches?

CheerZ