I have an issue about OSPF. When I try to use "Show ip ospf neighbor" I can not find which router is the DR router or BDR router it always show "Full/-" Here is my set up

enter image description here Can someone help me, Thank you

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    Jul 19, 2016 at 8:34
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1 Answer 1


It looks like you are using serial interfaces which use OSPF point-to-point network types as there can only be two devices on a serial link. DRs are only used on multi-access networks to reduce the number of adjacencies. They are not used on point-to-point networks, so both routers should be fully adjacent with each other .

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