mes Roman?; mso-ascii-font-family: ?Times New Roman??>验证OSPF中对外部路由路由的选择规则
OSPF在选择外部路由的时候，遵循的原则是：
[1]O E1优于O E2
[2]在同样的情况下，Cost越小越优先
[3]在cost相同的情况下，选择到达ASBR最优的路径
下面来通过实验来验证该规则:
基本配置：(注意ASBR的配置)
ip address 1.1.1.1 255.255.255.0
ip ospf network point-to-point
ip address 12.1.1.1 255.255.255.0
ip address 13.1.1.1 255.255.255.0
redistribute rip subnets metric-type 1
network 12.1.1.0 0.0.0.255 area 0
distance 109(因为RIP的AD大于OSPF,所以重发布到OSPF中，会发生路由抖动,故将其改小，详解看等级三实验手册1.3)
!
ip address 2.2.2.2 255.255.255.0
ip ospf network point-to-point
ip address 24.1.1.2 255.255.255.0
ip address 12.1.1.2 255.255.255.0
network 12.1.1.0 0.0.0.255 area 0
network 24.1.1.0 0.0.0.255 area 0
!
ip address 3.3.3.3 255.255.255.0
ip ospf network point-to-point
ip address 13.1.1.3 255.255.255.0
ip address 35.1.1.3 255.255.255.0
!
ip address 4.4.4.4 255.255.255.0
ip ospf network point-to-point
ip address 45.1.1.4 255.255.255.0
ip address 24.1.1.4 255.255.255.0
network 24.1.1.0 0.0.0.255 area 0
network 45.1.1.0 0.0.0.255 area 1
!
ip address 5.5.5.5 255.255.255.0
ip ospf network point-to-point
ip address 35.1.1.5 255.255.255.0
ip address 45.1.1.5 255.255.255.0
redistribute rip subnets metric-type 1
network 45.1.1.0 0.0.0.255 area 1
!
首 页
┆ 技术资讯 ┆ 下载中心 ┆ 誉天IT认证新社区 ┆ 注册会员 ┆ 联系我们 ┆ 在线报名咨询 ┆ 
减小字体
增大字体