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Re: Nexus emulation? Anyone?
From: David Sinn <dsinn () dsinn com>
Date: Tue, 20 Dec 2011 10:51:25 -0800

Titanium is a release vehicle for LISP 
(http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/release/LISP/50_lisp_nx-os_release_note.html), so it 
is public knowledge of it's existence.  Given that Titanium is just a PC with a few NIC's there shouldn't be much 
effort to get it to run under QEMU/KVM/[VM of your choice].  It would probably take someone some time to try and hack 
it together or quicker if Cisco was willing to publish some "use at your own risk" pointers.  It is, as Tim points out, 
a support question.  Hopefully the pressure of their large customers will get them to see that the support is worth it 
for the continued adoption of the platform.

As I said, other vendors have clued in to this and thus their friction to adoption is reduced as a result.


On Dec 20, 2011, at 10:18 AM, -Hammer- wrote:

Doesn't "Titanium" achieve this for you? I know. It's Internal. But it simulates the 7k. Or am I getting it backwards?

My point is that if Cisco already simulates it Internally it's only a matter of time before someone ports 


"I was a normal American nerd"
-Jack Herer

On 12/20/2011 12:19 PM, David Sinn wrote:
I don't think anyone is asking for a full simulation of the platform in software, that is how the actual ASIC's 
operate.  That is probably best for an entirely different conversation.

But there is huge need to simulate the control-plane functionally with a basic forwarding ability (not performant, 
but pass packets correctly such that you can verify the topology).  This is something Dyanmips does great in 
emulating a cluster of 7200's and allows operators to validate topologies and planned changes in mainstream IOS 
platforms.  Having that for NX-OS would increase the adoption and confidence in the platform.  VM's on multiple 
boxes make simulating a whole network of a given platform simple and easy.

From the outside Cisco continues to miss the need for this.  At least some of the other vendors are picking up how 
helpful this and are reacting positively to it.


<I've been ranting about this to my account team and Nexus management for a while now, so sorry if this is a 
duplicate you've already seen.>

On Dec 20, 2011, at 10:03 AM, Tim Stevenson wrote:

You couldn't use Titanium to judge/discuss the nexus family as a whole either. Aside from 1KV, all the nexus 
products use ASIC hardware specific to that platform/linecard and no NXOS software emulator exists that mimics 
those behaviors.

2 cents,

At 09:34 AM 12/20/2011, Luan Nguyen gushed:

You can't use the software switch Nexus 1000V to judge/discuss the Nexus
family products N7K, N5K...etc as a whole?

Check out this discussion

Titanium as they call the NX-OS simulator is not available to the public


On Tue, Dec 20, 2011 at 12:08 PM, -Hammer-<bhmccie () gmail com>  wrote:

Bah. Look like I need more of an education on Nexus in general. Thanks for
the easy pointer.


"I was a normal American nerd"
-Jack Herer

On 12/20/2011 11:02 AM, Nick Hilliard wrote:

On 20/12/2011 13:55, -Hammer- wrote:

I know we can't throw NX code on Dynamips but I figured I would ask the
group anyway. We are starting to discuss Nexus platform options and I can
only get so much from demo depot before our AM gets whiny. Is anyone
currently emulating Nexus on anything that is open to the public?




Tim Stevenson, tstevens () cisco com
Routing&  Switching CCIE #5561
Distinguished Technical Marketing Engineer, Cisco Nexus 7000
Cisco - http://www.cisco.com
IP Phone: 408-526-6759
The contents of this message may be *Cisco Confidential*
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