BGP Conditional Default Route
As per the diagram the primary path for Branch to access internet is via DC (left) and backup path is via HO (Right). However users in HO (connected via HO-WAN-RTR) should use internet via HO only. DC-WAN-RTR at DC advertises default route to PE1 and PE2 when a default route is received from the DC Local Internet.
But HO-WAN-RTR should advertise default route to PE1 and PE2 only when default route is received from its local Internet AND NOT RECEIVED from the DC site, how can we achieve this via BGP conditional route and i believe we need iBGP link between DC-WAN-RTR and HO-WAN-RTR?
Apart from PE1 and PE2 i have access to all routers.