@misc{rfc3883, series = {Request for Comments}, number = 3883, howpublished = {RFC 3883}, publisher = {RFC Editor}, doi = {10.17487/RFC3883}, url = {https://www.rfc-editor.org/info/rfc3883}, author = {Alex D. Zinin and Abhay Roy and Sira P. Rao}, title = {{Detecting Inactive Neighbors over OSPF Demand Circuits (DC)}}, pagetotal = 6, year = 2004, month = oct, abstract = {OSPF is a link-state intra-domain routing protocol used in IP networks. OSPF behavior over demand circuits (DC) is optimized in RFC 1793 to minimize the amount of overhead traffic. A part of the OSPF demand circuit extensions is the Hello suppression mechanism. This technique allows a demand circuit to go down when no interesting traffic is going through the link. However, it also introduces a problem, where it becomes impossible to detect an OSPF-inactive neighbor over such a link. This memo introduces a new mechanism called "neighbor probing" to address the above problem. {[}STANDARDS-TRACK{]}}, }