Cisco OSPF N1 和 N2 路由配置场景

注:机翻,未校对。


OSPF N1 and N2 Routes: Configuration Scenario

Introduction to OSPF Routes

OSPF路由介绍

Before discussing OSPF N1 and N2 routes, it is essential to understand OSPFroutes.
在讨论 OSPF N1 和 N2 路由之前,必须了解 OSPF 路由

OSPF external routes in a normal area would appear as either E1 routes or E2 routes. By default when we configure the redistribution of external routes in an OSPF area the route type for the external network is E2 which appear as OE2 in the routing table.
正常区域中的 OSPF 外部路由将显示为 E1 路由或 E2 路由。默认情况下,当我们在 OSPF 区域配置外部路由的重新分发时,外部网络的路由类型为 E2,在路由表中显示为 OE2。

  • E1 are the route when the cost of the internal links is taken into consideration for SPF calculation.
    E1 是将内部链接的成本考虑在 SPF 计算中的路由。

  • E2 are the routes which take only the external link cost into the SPF calculation.
    E2 是仅将外部链接成本纳入 SPF 计算的路由。

OSPF N1 and N2 Routes

OSPF N1 和 N2 路由
OE1 or OE2 both are represented by LSA type 5 in the OSPF database. Now in a special OSPF area,

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