Categories R&S

OSPF – Implement and troubleshoot authentication – Clear text authentication

Let’s move on to OSPF authentication. First, basic clear text authentication.   Theory: OSPFv2 supports three types of authentication: Type 0= null authentication (no authentication) Type 1= clear text authentication Type 2= MD5 authentication or HMAC-SHA authentication.   Requirements: Configure OSPF clear text authentication between R6 and R7.   Diagram:   Configuration and verification:   […]

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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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