Category: Routing


Open Shortest Path First (OSPF) is link-state protocol that uses the Djikstra Algorithm to determine a shortest path tree.  The OSPF algorithm uses cost defined on links to determine the best path to a network.  For OSPF to remain loop free, each and every router needs to know of all ... Read More
April 1, 2014Praveen Bahethi


Dynamic Host Configuration Protocol (DHCP) relay on Comware is configured with concept of multiple DHCP servers and applied to the interfaces.  This configuration allows for added information to allow scale, but is ungainly when you have one or two DHCP servers. In the end, the configuration requirements are straight forward ... Read More
March 30, 2014Praveen Bahethi


A default route is a catch-all route for routes not in the routing table.  It is often confused with default gateways, which provide end devices a router to send all non-local traffic for forwarding. Routing tables list the direction to reach a network.  When there is no path in the table, ... Read More
March 27, 2014Praveen Bahethi


The routing table is created over time as updates are sent by the Routing Protocol.  The example below shows a simulation of how a routing protocol would converge. Each Router has it’s directly connected routes associated with its interfaces, white background with cost = direct.  These networks were configured by network ... Read More
January 21, 2014Praveen Bahethi