ospf eigrp等路由协议详细配置手册（OSPF, EIGRP and other routing protocol detailed configuration manual）.docVIP

ospf eigrp等路由协议详细配置手册（OSPF, EIGRP and other routing protocol detailed configuration manual） The full name of OSPF protocol open shortest path first protocol (OPEN SHORTSET PATH FIRST) Use OSPF protocol No. 89, using the IP message transmission. (multilayer sandwich message structure, but you cant pick the meat to eat... -0-) The OSPF protocol is a link state protocol based on SPF algorithm, and the implementation of SPF algorithm based on OSPF protocol is established using a similar distance vector protocol relay mode is proposed on the LSA database. That is the first to establish the status of the FULL LSA database, and then use the SPF algorithm to create their own routing table. RID: have the highest priority in the designated Router OSPF process after the opening of the RID. No designated RID, the router is in all your LOOP BACK address, the largest address for your RID. Finally, the router is to choose their own all the physical interface on top of the IP address for your RID. (here we recommend you the best in that when OSPF starts to set up their own RID, even if you have the LOOP address of the BACK.) RID is a unique identifier in the OSPF area router. Note: if RID is born in the physical interface, then the shutdown interface does not change its RID, unless you remove your OSPF process. And when you set up FULL router adjacency state, also cannot use the Router-id command to modify RID. Hello message function: 1, it is found that the neighbor method. 2, before the two routers become neighbors, need several parameters through the Hello protocol to announce the two routers must be mutually recognized. (ID, witness information network mask, Hello interval, router invalid time and option value.) 3, the Hello message Keeplive in the play the role between neighbor routers. 4, it ensures the two-way communication between neighbor routers. (Two-way) 5, it is used in a radio network or non broadcast multiple access (NBMA) network selection (DR) and backup designated