Title: Detecting Inactive Neighbors over OSPF Demand Circuits (DC)
Author(s): S. Rao, A. Zinin, A. Roy.
Status: PROPOSED STANDARD
Date: Oct 2004
Length: 13100
Updates: RFC1793
OSPF is a link-state intra-domain routing protocol used in IP networks. OSPF behavior over demand circuits (DC) is optimized in RFC1793 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.
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