I heard that when the primary line is restored, since the static route is still inside the routing table, BGP route won't move from BGP table to routing table thus ISDN won't disconnect.
Any suggestions to resolve this problem?
I need to know this urgently because the connectivity between my HQ and branches will be changed from leased line to MPLS VPN. All the sites link to MPLS VPN via BGP and ISDN will be chosen as backup.