GNS3 now has a FRRouting appliance. This makes it easy to run a whitebox switching / routing appliance in GNS3. FRR supports multiple protocols including EIGRP, OSPF, BGP, PIM, RIP and more.
In this demo I show you how can with FRRouting (FRR) and Cisco IOSv.

FRRouting: https://frrouting.org/
FRRouting documentation: https://frrouting.org/user-guide/
GitHub: https://github.com/FRRouting/frr
Cumulus Networks: https://cumulusnetworks.com/learn/frrouting/
RFC: https://tools.ietf.org/html/rfc7868

FRRouting (FRR) is an IP routing protocol suite for Linux and Unix platforms which
includes protocol daemons for BGP, IS-IS, LDP, OSPF, PIM, and RIP.

FRR’s seamless integration with the native Linux/Unix IP networking stacks
makes it applicable to a wide variety of use cases including connecting
hosts/VMs/containers to the network, advertising network services, LAN
switching and routing, Internet access routers, and Internet peering.

FRR has its roots in the Quagga project. In fact, it was started by many
long-time Quagga developers who combined their efforts to improve on
Quagga’s well-established foundation in order to create the best routing
protocol stack available. We invite you to participate in the FRRouting
community and help shape the future of networking.

Join the ranks of network architects using FRR for ISPs, SaaS infrastructure,
web 2.0 businesses, hyperscale services, and Fortune 500 private clouds.