Duplicate/erroneous routes or Winbox bug

[iam8up]

Why am I seeing the same route multiple times? It’s dynamic so it’s coming from somewhere.

The CLI does not see these extra routes, I don’t know if it’s because they’re not actually in the routing table or not…or something else?

[mrz]

F5 to refresh.
Also you should be looking /routing/route list not /ip/route

[iam8up]

F5 doesn’t seem to do anything at all from what I can tell. This is Winbox launcher 3.43 on ROS 7.20.2.

Under /routing route it looks like the erroneous subnets are n - BGP-NET; B - BLACKHOLE

Neither of the 3 peers (1 ebgp, 2ibgp) are advertising these routes. The router in the screenshot and in question is announcing these routes. Can I do something to not have these duplicates show up?

[jaclaz]

@iam8up

B - BLACKHOLE

That seems like a feature (or bug) in 7.20.x:

V7.20 BGP automatic Blackhole adding

Hello everyone. Since v7.20.x a blackhole route is automatically added for every advertised prefix even if this route is already in the main routing table. For example: I’m advertising prefix 10.0.0.0/24 to my remote BGP peers. This is a local IP range, which is already in the main routing table: /ip route print Columns: DST-ADDRESS, GATEWAY, ROUTING-TABLE, DISTANCE DAc 10.0.0.0/24 local-bridge main 0 But now with v7.20.x on top of that I have an additional d…

[iam8up]

Good call, thanks!

This behavior was added in 7.20.x and is expected to be fixed/released in 7.21

V7.20 BGP automatic Blackhole adding

You can wait for the release of 7.21 or install the current beta, from the changelog: bgp - added output.network-blackhole setting; bgp - do not auto-generate blackhole routes by default (introduced in v7.20);