i am looking for a software tools set that let me setup a multi-point to multi-point VPN which is called VPLS over IP (not MPLS) . does any one have any suggestion how can I get in to this?
The answer is yes, you can do this, BUT the techniques are still sort of vendor-specific. For instance, Juniper and Cisco have their solutions, which can build the VPLS using BGP or MPLS (respectively RFC 4761 and RFC 4762).
http://www.cisco.com/c/en/us/products/ios-nx-os-software/virtual-private-lan-services-vpls/index.html
http://www.juniper.net/techpubs/en_US/junos12.3/information-products/pathway-pages/config-guide-vpns/config-guide-vpns-vpls.html#overview
This will give you a single, virtual layer 2 network, like a (potentially) giant single Ethernet. So the same considerations should apply as they would with a non-virtual large single LAN. Meaning, it's not necessarily a great idea!
Although the VPLS is built on an IP infrastructure, traffic within the VPLS does not need to be IP at all. Same as in any other layer 2 network.
Looks like Nokia offers a 1-week course on this subject, various dates, various places:
https://networks.nokia.com/src/course/virtual-private-lan-services
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