GBP tag propagation with EVPN-VXLAN to EVPN-VXLAN stitching

We support group-based policy (GBP) tag propagation for EVPN Type 2 and Type 5 routes in a stitched EVPN-VXLAN data center environment. GBP uses existing Layer 3 VXLAN network identifiers (VNIs) in conjunction with firewall filter policies to provide microsegmentation at the device or tag level, independent of the underlying network topology.