Re: Viability of GNS3 network simulation for testing features/configurations.

[Hugo Slabbert <hugo () slabnet com>]

The alternative or complementary approach is something like batfish[1], for 
validation vs. emulation.

--
Hugo Slabbert       | email, xmpp/jabber: hugo () slabnet com
pgp key: B178313E   | also on Signal

[1] https://www.batfish.org/

On Wed 2019-Oct-16 12:19:31 -0400, Yan Filyurin <yanf787 () gmail com> wrote:

> This also depends on your scale.  If you have lots of routers, you would end up with lots of compute to run the VM 
> instances.  If you get the compute (which is cheap comparing to actual network hardware), you would need a "cloud 
> orchestration” tool and a a system to connections from host to host like some form of overlay networking.
>
> GNS3 would do a good job, but for something with a bit more orchestration APIs.  There is this:
>
> https://networkop.co.uk/post/2019-01-k8s-vrnetlab/ <https://networkop.co.uk/post/2019-01-k8s-vrnetlab/>
>
> And the nice people who even show up to NANOG every once in a while:
>
> https://www.tesuto.com/ <https://www.tesuto.com/>
>
> There are a few other tools that people built on their own if you scrub GitHub.  I even felt into that trap and 
> exploring VRnetlab.
>
> But numerous things were achieved.  Yes, you would miss out on all the hardware bugs, hardware adaption layer issues 
> and maybe a scale issue or two, but with enough instances, route generators and maybe even some application (some of 
> these things can even forward traffic), you could discover 90% of things that can go wrong.
>
> And you get the flexibility of downloading evaluation images of all kinds of things, so maybe you can avoid spending 
> any money.
>
> Yan
>
>
>
>
> > On Oct 16, 2019, at 12:03 PM, Jason Kuehl <jason.w.kuehl () gmail com> wrote:
> >
> > I did this at my current company with also using VM Palo Alto.
> >
> > Greeting of testing out a plan to make sure its insane.
> >
> > The key it keeping its all up todate down to the firmware version (I know its not possible for some because virtual)
> >
> > The things this wont find are hardware related faults or issues.
> >
> > On Wed, Oct 16, 2019 at 11:52 AM Ryland Kremeier <rkremeier () barryelectric com <mailto:rkremeier () barryelectric 
> > com>> wrote:
> > Hello,
> >
> >
> >
> > I’m currently in the process of setting up a near identical network to our own in GNS3 for testing purposes. Has anyone 
> > here tried this before to any success? We need to buy the Cisco IOSv image to continue with the sim so I figured I 
> > would inquire here first before diving in.
> >
> >
> >
> > All info is appreciated,
> >
> > --
> >
> > Ryland Kremeier
> >
> >
> >
> > --
> > Sincerely,
> >
> > Jason W Kuehl
> > Cell 920-419-8983
> > jason.w.kuehl () gmail com <mailto:jason.w.kuehl () gmail com>

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