[HECnet] Recommended CISCO switch simulator with GRE support?

[Supratim Sanyal]

Very exciting. So Chris (cgk) and I are going to have fun trying a few 
things:

- Current plan (in progress): give SSL over VDE switch a shot - probably 
we will end up in a classic Ethernet loopback situation and move to plan B
- Plan B: bridge + tun/tap + dynamips
- Plan C: Radovan Brezula's GNS3 article 
(http://brezular.com/2015/09/29/gre-tunnel-between-cisco-and-linux/)
- Plan D: Scotch, double, on the rocks

I will disconnect my MULTINET uplink to HECnet while all this 
experimentation goes on (don't want to worry Johnny too much).

We will report progress here.

Thanks again all!


On 3/14/2018 18:21, Mark Abene wrote:
> You probably just want linux's built-in bridge driver, which you 
> manage with brctl.
> "br0" is the main interface, which you're free to assign a DECnet 
> compatible MAC address to. The other ports in the bridge/switch can be 
> any of real ethernet or tap interfaces.
> Use a tap interface to run dynamips on. You can use dynagen to manage 
> your router instance.
> I've literally been doing this for years. My HECnet router is a 
> dynamips emulated Cisco 720whatever on a tap interface with a GRE 
> tunnel over the Internet to Dave McGuire's area 61. I have my other 
> emulated systems on tap interfaces, all connected to the same virtual 
> bridge/switch on the same linux machine.
>
> -Mark
>
>
> On Wed, Mar 14, 2018 at 3:12 PM, Supratim Sanyal <supratim at riseup.net 
> <mailto:supratim at riseup.net>> wrote:
>
>     >On 3/14/2018 17:58, Brian Hechinger wrote:
>     >He doesn't say he wants to emulate a switch but rather connect a
>     GRE tunnel to one. He doesn't specify what he wants on the virtual
>     end but probably a router will do.
>
>     Yes, sorry, I should have described what I am trying to achieve.
>     Basically a few virtual nodes talking DECnet, AppleTalk and
>     NetBIOS/NetBEUI protocols (no IP), plugged into some virtual
>     switch or router that can setup a GRE tunnel to a real CISCO
>     switch on the other end, which also has DECnet and AppleTalk nodes
>     on it.
>
>     I came across this just now based on the pointers received so far
>     and will research this:
>     http://brezular.com/2015/09/29/gre-tunnel-between-cisco-and-linux/
>     <http://brezular.com/2015/09/29/gre-tunnel-between-cisco-and-linux/>
>
>     Thanks for the information; keep it coming!
>
>     Supratim
>
>
>     On 3/14/2018 17:58, Brian Hechinger wrote:
>>     He doesn't say he wants to emulate a switch but rather connect a
>>     GRE tunnel to one. He doesn't specify what he wants on the
>>     virtual end but probably a router will do.
>>
>>     On Mar 14, 2018 17:11, "Dave McGuire" <mcguire at neurotica.com
>>     <mailto:mcguire at neurotica.com>> wrote:
>>
>>
>>           Ooops, I'm sorry, I missed the word "switch" in the OP's
>>         message.
>>         Thank you for the clarification.
>>
>>                    -Dave
>>
>>         On 03/14/2018 05:04 PM, Madeline Autumn-Rose wrote:
>>         > Dynamips doesn’t emulate Cisco switches; be aware.
>>         >
>>         > Routers with switch modules and a basic switch
>>         implementation exists,
>>         > however.
>>         >
>>         > You could in theory also tie to VDR
>>         >
>>         > Sent from my iPhone
>>         >
>>         > On Mar 14, 2018, at 13:25, Brian Hechinger
>>         <wonko at 4amlunch.net <mailto:wonko at 4amlunch.net>
>>         > <mailto:wonko at 4amlunch.net <mailto:wonko at 4amlunch.net>>> wrote:
>>         >
>>         >> I like to use GNS3 to get everything setup and then switch
>>         to dynamips
>>         >> after I know what I'm doing.
>>         >>
>>         >> Been to Long since I ran either though. Need to get a
>>         house and get
>>         >> moved so I can get the wicked cool networking back up.
>>         >>
>>         >> On Mar 14, 2018 16:10, "Dave McGuire"
>>         <mcguire at neurotica.com <mailto:mcguire at neurotica.com>
>>         >> <mailto:mcguire at neurotica.com
>>         <mailto:mcguire at neurotica.com>>> wrote:
>>         >>
>>         >>     On 03/14/2018 03:05 PM, Supratim Sanyal wrote:
>>         >>     > Any recommendations on a CISCO switch simulator that
>>         runs on Linux
>>         >>     > (Ubuntu 17.10) and supports GRE tunneling to a real
>>         CISCO switch
>>         >>     over
>>         >>     > the internet?
>>         >>
>>         >>       Dynamips should do it.
>>         >>
>>         >>               -Dave
>>         >>
>>         >>     --
>>         >>     Dave McGuire, AK4HZ
>>         >>     New Kensington, PA
>>         >>
>>
>>
>>         --
>>         Dave McGuire, AK4HZ
>>         New Kensington, PA
>>
>
>

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