Hello! I believe that I'm a user with BIRD experiences but current I have no idea why the attribute "ospf_tag" from one OSPF instance to another is unavailable. In this real life example you can see that I receive a default route from my ISP that is tagged with "7b". This tag is not visible on the VPN client. I use for each VPN network a OSPF instance with some filter rules but only static routes (Core VPN) with a "ospf_tag" are usable to filter like "if ospf_tag = xyz then ..." How can I exchange routes based on a "ospf_tag" between two or more OSPF router instances? [Core VPN Router] BIRD 1.6.0 ready. 0.0.0.0/0 via 82.206.X.33 on lagg0 [titan 2016-12-25] * E2 (150/5/10) [7b] [217.173.X.190] [VPN Client] BIRD 1.6.0 ready. 0.0.0.0/0 via 10.82.16.1 on tun2 [lte 00:28:10] * E1 (150/5) [82.206.X.34] via 10.82.17.1 on tun3 [umts 00:28:11] E1 (150/10) [82.206.X.34] -- Static-Tagging Works Fine --- route 11.0.0.0/8 via 82.206.X.33 { ospf_tag=16170; }; filter openvpn9x16171_export { if net = 0.0.0.0/0 then { ospf_metric1 = SEC_M1_VPN; ospf_metric2 = SEC_M2_VPN; accept; } // [...] if ospf_tag = 16171 then { <== WORKS FINE because static route ospf_metric1 = SEC_M1_VPN; ospf_metric2 = SEC_M2_VPN; accept; } reject; } -- Best regards, Markus