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what are the benefits if i change tenant network types from gre to vxlan in openstack neutron

in my lab i have 5 node( 3 compute node) open stack environment all my computes nodes are communicating with neutron using gre tunnel types . i curios to know if i change layer 2 tenant network type from gre to vxlan what are the benefits when it comes to big farm (i mean more than 2000 compute nodes) is it feasible to use GRE protocol in production environment ?