Scan all bgp vrf instances and respective L3VNI against the VNI which is being configured.
Ticket:CM-21859
Testing Done:
Configure l3vni,
try to configure same vni as l2vni under router bgp, address-family
l2vpn evpn.
The configuration is rejected.
show evpn vni
VNI Type VxLAN IF # MACs # ARPs # Remote VTEPs Tenant VRF
4001 L3 vx-4001 0 0 n/a vrf1