Troubleshooting Dial-on-Demand Routing Issues in OSPF This section discusses the issues related to DDR. When OSPF is configured over a DDR link, be sure to suppress OSPF Hellos because OSPF sends Hellos over point-to-point links every 10 seconds. The most common issues related to OSPF over DDR links are as follows: Problem: OSPF Hellos are bringing up the link … [Read more...]