一杯清茶

case 2.1DR and BDR become adjacent with all other routers.nsm_twoway_received() changes nbr state from NSM_Init to NSM_ExStart.two ways can trigger this function.ospf_hello  |--OSPF_NSM_EVENT_EXECUTE

1. start an ospf processa. data structureospf_master{}  |--ospf--ospf{}  b. main routinesrouter_ospf  |--ospf_get       |--ospf_new            |--ospf_lsa_maxage_walker            |--ospf_lsa_refresh_

case 3.1ospf_router_lsa_originate  |--ospf_router_lsa_body_set       |--router_lsa_link_set            |--lsa_link_broadcast_set                        A router originates a router-LSA for each area t

Calculation of the routing table1.Calculating the shortest-path tree for an area,   -yields the set of intra-area routes  -examine router-LSAs and network-LSAs  -consider those links between routers a