ospf

In this short article, I would like to point out some similarities and differences in using passive-interface command between two link-states protocols Open Shortest Path First (OSPF) and Intermediate System to Intermediate System (IS-IS). Topology Every router has a Loopback0 configured with IP address X.X.X.X/32, where X is the router number, i.e R2 (2.2.2.2/32) Transit links are configured with IP addresses 10.X.Y.0/24, where X and Y are adjacent router numbers, i....

Traffic engineering in the OSPF networks is not that easy and sometimes can be a daunting or even impossible task, due to the fact that OSPF has many path selection rules. In this lab, I would like to discuss a scenario, where you can “hack” the regular OSPF rule, which states that inter-area routes are preferred over inter-area. Diagram Every router has a Loopback0 configured with IP address X.X.X.X/32, i.e R2 (2....