On Mar 14, 2018, at 13:25, Brian Hechinger <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> 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

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: -- Dave McGuire, AK4HZ New Kensington, PA

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/ 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> 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: 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: