CCNPOSPF协议介绍.ppt

SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 SPOTO IT人才培训机构 www.SPOTO.net 以伙伴关系帮助客户成功，帮助员工成功，帮助合作伙伴成功。 Introducing the OSPF Protocol SPOTO KMS Link-State Routing Protocols Link-state routers recognize more information about the network than their distance vector counterparts. Each router has a full picture of the topology. Consequently, link-state routers tend to make more accurate decisions.(能够根据准确的网络拓扑信息独立地作出决策) 距离矢量路由协议？ 链路状态路由协议？ Link-State Protocols Link-State Data Structures Neighbor table: Also known as the adjacency database Contains list of recognized neighbors Topology table: Typically referred to as LSDB (OSPF拓扑数据库) Contains all routers and their attached links in the area or network Identical LSDB for all routers within an area Routing table: Commonly named a forwarding database (转发数据库) Contains list of best paths to destinations Link-State Data Structure: Network Hierarchy Link-state routing requires a hierachical network structure that is enforced by OSPF. This two-level hierarchy consists of the following: Transit area (backbone or area 0) Regular areas (nonbackbone areas) OSPF areacharacteristics: Minimizes routingtable entries Localizes impact ofa topology changewithin an area Detailed LSAflooding stops atthe area boundary Requi