5 - non-synchronous network statements are gone, so you can't easily send scrub communities via BGP anymore (because a legit route now has to exist in table) Following on from this, is very close to my biggest complaint on ROS7. We use RouterOS devices for our blackholing system (blocking nasties, unpaid suspensions, etc), and would tag the routes with communities on ROS 6.x. You cannot set a community on routes anymore. We had to have multiple local bridges, with different local IP's on them, and then use route filters to test on next-hop IP of local routes, and use those to set the blackholing communities we advertise upstream to our route reflectors (and thus on to upstreams, or just to borders for blackholing) Cheers, DG On Fri, 17 Nov 2023 at 12:33, Tim Warnock via Public < public@talk.mikrotik.com.au> wrote:

Hey Guys,

I ran an experiment to upgrade a ROS6 box to ROS7 to see what it looks like and found at least the following things:

1 - route "check" tracking doesn't seem to work? 2 - no-exports set on routes towards EBGP peers are interpreted rather than forwarded - so you can't signal to EBGP peers to no-export your routes from outside of their ASN anymore. 3 - it appears that the route policy conversion bugs out if one of the entries is disabled so you have to be prepared to fix any entries that are missing. 4 - you can no longer set the ASN of a route being advertised. (would need to update RPKI information) 5 - non-synchronous network statements are gone, so you can't easily send scrub communities via BGP anymore (because a legit route now has to exist in table).

1,2 and 3 feels like bugs, the rest I'm not sure why the functionality was removed.

Anyone successfully spoken to MikroTik about what their thought process was with the changes? (I opened a ticket for 2 and it was ignored.)

Thanks Tim

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