MP-eBGP between to two ISPs RR is a best practice?
I have come across a lab setup MP-BGP Inter-AS VPNv4. In this setup MPLS is running between two ASBR and MP-BGP vpnv4 peering is made between to RR. By this both the ISP can recevice all the vpnv4 prefixes. IS THIS A BEST PRACTICE ?
Re: MP-eBGP between to two ISPs RR is a best practice?
This is possible and durable scenario, however it's not a recommended Setup.
I would not advice of running MPLS or enabling LDP between two different Autonomous systems. Rather I would allow BGP to forward Labeled VPNv4 or VPNv6 packets. So don't enable mpls between these interfaces , you only need to allow BGP to forward labeled packets by having this command in place (MPLS BGP Forwarding).
Another point is that you need to filter VPNv4 routes to be sent at the ASBR for ONLY VPN1 and VPN2 , as a best practice and from Security prespective.
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