OSPF fast convergence is an extended feature of OSPF implemented to speed up the convergence of routes. It includes the following: I-SPF Incremental SPF (I-SPF) recalculates only the routes of the changed nodes rather than all the nodes when the network topology changes. This speeds up the calculation of routes. PRC Partial Route Calculation (PRC) …
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Comparison of Basic Characteristics Similarities: Both protocols are widely used IGP protocols Both protocols are link state protocols Both protocols support IP environment Both protocols adopt hierarchical design and area division Differences: IS-IS supports CLNP environment IS-IS only supports PPP and broadcast network; OSPF supports PPP, broadcast, P2MP and NBMA network. OSPF supports virtual link …
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