The BGP implementation on Meraki seems to be focused on using it as a route transport for a VPN overlay. I have a network which Meraki Internet edge devices (HA pair), which terminate a couple of PtP VPNs, but do not use AutoVPN. Today we have a pair of ISRs that run BGP and advertise a /24 via a publicly registered ASN, to two different ISPs. The ISRs accept full Internet BGP routing tables and thereby route traffic out over the best BGP AS-Path, and they advertise our /24 to both ISPs and thereby allow traffic to be received on either ISP.
The Meraki MXs are already configured to NAT several internal (DMZ) systems to the public /24, which exists between the ISR routers and the Meraki MX firewalls.
We are looking to get rid of the ISRs. I understand that we will need to contact the ISPs and have them send us a default route only, and that we will need to weight each ISP's BGP neighbors so that we have a primary and a secondary. We will also need to do a BGP AS pre-pend to the secondary ISP, to make sure that we don't receive traffic from that ISP.
Since the BGP implementation on Meraki seems pretty focused on usage as a VPN overlay for AutoVPN, I wanted to see if anyone has done BGP to 2 different ISPs to advertise a registered /24, or if there would be any problems expected in doing so?
Since Meraki MX's don't support a loopback interface, I was planning to create the /24 as a static route, to be redistributed by BGP, but I also have not found a way to do that in the BGP routing config. Are static routes automatically redistributed by BGP? If so is there a way to use a route-map to limit what routes (prefixes) are advertised to the eBGP neighbors?
