Categories R&S

OSPF – Implement and troubleshoot path preference – Non backbone transit areas

Theory: From the Cisco website: « The OSPF Area Transit Capability feature is enabled by default. RFC 2328 defines OSPF area transit capability as the ability of the area to carry data traffic that neither originates nor terminates in the area itself. This capability enables the OSPF ABR to discover shorter paths through the transit area […]

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Categories R&S

OSPF – Implement and troubleshoot path preference – Auto cost

Let’s start working on how to influence the OSPF path selection.     Theory: The formula for OSPF automatic cost calculation is the following: Interface Cost = Reference Bandwidth / Interface Bandwidth By default, the reference bandwidth is 100Mbps. R1#sh ip ospf | s Reference Reference bandwidth unit is 100 mbps   So a 100Mbps […]

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