Good evening,
I’m pretty new to the world of BGP routing. In my configuration I have a single ISP that passes the FIRT to me through a BGP instance. Everything ok but I saw that the mikrotik CCR always has a 100% CPU. Since I have a single ISP I wanted to know how I could block the automatic acquisition of all routes and be able to replace them by a single general static route 0.0.0.0/0.
Any information would be welcome. thanks
You need to ask upstream provider to only annoince default route to you, then in routing filters, only accept default prefix and discard all others
I would ask your provider to send you a full table + default so that you can discard the full table. However, if you decide to leak specific routes or allow the full table in the future, it doesn’t require a change by the upstream provider.