Hello Marek, could you please send the dumps to me directly? We'll investigate. I'm pretty convinced that MRT should work in BIRD 3, there were not many changes, but something may have slipped through. Could you please attach your config as well? Thanks! Maria On Sun, Nov 23, 2025 at 06:17:52PM +0000, Marek Küthe wrote:

Hello,

After changing the GRC from bird2 to bird3, the mrt dumps no longer work. Could someone take a look at this? I have attached a faulty MRT dump. peerindex and bgpgrep from ubgpsuite do not display any peers or attributes. My custom MRT parser can no longer read the MRT files. The mrt2json conversion from mrtparse looks strange.

Best regards, Marek Küthe

PS: Seems the mrt dump was too big.

On Sun, 23 Nov 2025 00:10:50 +0100 bird-users-owner@network.cz wrote:

...

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mrt dumps are broken in bird3 (was: Re: [dn42] Route Collector migration announcement)

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-- Marek Küthe m.k@mk16.de er/ihm he/him

-- Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.