I have 3 subnets /28 and 1 subnet /29 that are routed over PTP /30 link. And default route is added as static in routing table.
Recently my organization acquired AS number and new /24 subnet. I made BGP with one provider that is also provider of old subnets mentioned above. They are sending me only default route.
My problem is that default route learned from BGP is not injected into routing table because of static default route. So all outbound traffic with new subnet over BGP is done with policy routing and it is working but inbound traffic that comes on BGP peer interface is dropped because of RPF. It checks path and drops packet.
I have to change all public addresses from old ranges to new range. It would be great if both ranges are available at the same time from outside so that I can gradually switch.
My provider tried with full BGP table but behavior is the same.
Is there a way to have both default routes in main table so that I don't have to kill static route and then rely on faith that everything will be fine when switching all IP addresses in one night?
Help would be much appreciated.