set policy-options prefix-list inside_users X.X.X.X/24
set policy-options prefix-list default_route 0.0.0.0/0

set policy-options policy-statement export_default_route term term1 from protocol ospf
set policy-options policy-statement export_default_route term term1 from prefix-list default_route
set policy-options policy-statement export_default_route term term1 then accept

set policy-options policy-statement import_inside_users term term1 from protocol ospf
set policy-options policy-statement import_inside_users term term1 from prefix-list inside_users
set policy-options policy-statement import_inside_users term term1 then accept

set policy-options policy-statement allow_inside_users term term1 from instance inside_vr
set policy-options policy-statement allow_inside_users term term1 from protocol ospf
set policy-options policy-statement allow_inside_users term term1 from prefix-list inside_users
set policy-options policy-statement allow_inside_users term term1 then accept

set policy-options policy-statement import_default_route term term1 from instance outside_vr
set policy-options policy-statement import_default_route term term1 from protocol ospf
set policy-options policy-statement import_default_route term term1 from prefix-list default_route
set policy-options policy-statement import_default_route term term1 then accept

set routing-instances inside_vr instance-type virtual-router
set routing-instances inside_vr routing-options instance-import import_default_route
set routing-instances inside_vr protocols ospf export export_default_route

set routing-instances outside_vr instance-type virtual-router
set routing-instances outside_vr routing-options instance-import allow_inside_users
set routing-instances outside_vr protocols ospf export export_default_route