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<dt style="font-size: 13px; background-color: rgb(242, 252, 254);">When I set my ospf interface eth1's address to be 10.2.1.2/30, neighbor router ethernet interface IP address to be 10.2.1.1/30, the neighbor shows it's PTP type:</dt><dt style="font-size: 13px; background-color: rgb(242, 252, 254);"><br>
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<div>bird> sh ospf neighbors
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<div>ospf_rdomain_0:</div>
<div>Router ID Pri State DTime Interface Router IP
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<div>172.16.20.76 1 Full/PtP 00:35 vni-0 10.2.1.1 </div>
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<div>If I change the interfaces' IP address to be 10.2.1.x/24 or I force interface type to be bcast in Bird's ospf config, it shows as </div>
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<div>bird> sh ospf neighbors </div>
<div>ospf_rdomain_0:</div>
<div>Router ID Pri State DTime Interface Router IP </div>
<div>172.16.20.76 1 Full/DR 00:35 vni-0 10.2.1.1 </div>
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<div>My question is how does Bird detect the connected network type?</div>
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<div>Thanks,</div>
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<div>Wei </div>
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