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Routing protocols like OSPF and BGP have been unstable in beta1 through beta6 and need some work to stabilize them.Routing filters need to be rewritten to simplify the syntax and operation – there were a lot of complaints with the original syntax.MikroTik recently added a detailed update on where the development roadmap is at and what the challenges are: If you’ve been around MikroTik for a while, then you know that version 7 has been in the works for a long time to add new functionality and address limitations of the older Linux kernel in ROSv6. The original v7 routing filters were very complicated to work with and had esoteric terms for operations like ‘subsumes’ and required ‘rule’ and ‘select-rule’ config to actually reference the filter in the routing process.

MikroTik – RouterOSv7 first look – Dynamic routing with IPv6 and OSPFv3/BGP – I wrote an article in late 2020 on IPv6 with BGP/OSPF using beta2 and captured a few screenshots that aren’t in the online docs anymore. If the current filter documentation represents the newer style, there are several differences in the format. The more complicated language like ‘subsumes’ is gone and only one filter rule is required to use the filter in the routing process – the ‘select-rule’ syntax is gone. The new filter syntax appears to have made it onto under /routing/filter but this may change in the coming weeks.