为什么rip中重分配ospf会改变rip网络上所有不直接连接重分配路由器的路由器的路径

网络工程 思科 ospf 撕裂
2022-02-17 03:34:39

我有三个相互连接的路由器。如图所示，每个都有一个它使用的子网（eigrp、ospf、rip）

数字

我设法重新分配 EIGRP 和 OSPF，这很完美。但是当我尝试重新分配 RIP 和 OSPF 时，RIP 路由器 3 会更改其通过（图 2）

图 2

在应用这些命令之前：

router rip
redistribute ospf 1 metric 2

和

router ospf 1
redistribute rip subnets

在路由表中，路由表中该路由器的路径如下所示：

R 15.30.7.48/30 [120/1] via 15.30.7.53, 00:00:18, GigabitEthernet0/2

应用上述命令进行重新分发更改：

O E2    15.30.7.48/30 [110/20] via 15.30.7.74, 00:01:29, Serial0/3/0

并且这个网络的通路不应该改变

为什么会这样？我该如何解决？

编辑：

这是我的路由表在重新分配 OSPF 之前在路由器 3 上的样子

Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     15.0.0.0/8 is variably subnetted, 17 subnets, 6 masks
R       15.30.5.0/25 [120/2] via 15.30.7.58, 00:00:22, GigabitEthernet0/1
R       15.30.5.128/26 [120/2] via 15.30.7.53, 00:00:21, GigabitEthernet0/2
R       15.30.6.64/26 [120/1] via 15.30.7.53, 00:00:21, GigabitEthernet0/2
C       15.30.6.128/27 is directly connected, GigabitEthernet0/0
L       15.30.6.129/32 is directly connected, GigabitEthernet0/0
R       15.30.6.240/29 [120/1] via 15.30.7.58, 00:00:22, GigabitEthernet0/1
R       15.30.7.48/30 [120/1] via 15.30.7.53, 00:00:21, GigabitEthernet0/2
C       15.30.7.52/30 is directly connected, GigabitEthernet0/2
L       15.30.7.54/32 is directly connected, GigabitEthernet0/2
C       15.30.7.56/30 is directly connected, GigabitEthernet0/1
L       15.30.7.57/32 is directly connected, GigabitEthernet0/1
R       15.30.7.60/30 [120/2] via 15.30.7.58, 00:00:22, GigabitEthernet0/1
                      [120/2] via 15.30.7.53, 00:00:21, GigabitEthernet0/2
R       15.30.7.64/30 [120/1] via 15.30.7.58, 00:00:22, GigabitEthernet0/1
C       15.30.7.72/30 is directly connected, Serial0/3/0
L       15.30.7.73/32 is directly connected, Serial0/3/0
C       15.30.7.76/30 is directly connected, Serial0/3/1
L       15.30.7.77/32 is directly connected, Serial0/3/1

重分配OSPF后的路由表：

Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     15.0.0.0/8 is variably subnetted, 34 subnets, 6 masks
O       15.30.2.0/25 [110/67] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.2.128/25 [110/68] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.3.0/25 [110/69] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.4.0/25 [110/68] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.4.128/25 [110/67] via 15.30.7.74, 00:00:18, Serial0/3/0
O E2    15.30.5.0/25 [110/20] via 15.30.7.74, 00:00:18, Serial0/3/0
O E2    15.30.5.128/26 [110/20] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.5.192/26 [110/66] via 15.30.7.74, 00:00:18, Serial0/3/0
O E2    15.30.6.64/26 [110/20] via 15.30.7.74, 00:00:18, Serial0/3/0
C       15.30.6.128/27 is directly connected, GigabitEthernet0/0
L       15.30.6.129/32 is directly connected, GigabitEthernet0/0
O       15.30.6.192/27 [110/65] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.6.224/29 [110/66] via 15.30.7.74, 00:00:18, Serial0/3/0
O E2    15.30.6.240/29 [110/20] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.6.248/30 [110/65] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.6.252/30 [110/66] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.7.0/30 [110/68] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.7.4/30 [110/65] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.7.8/30 [110/67] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.7.12/30 [110/67] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.7.16/30 [110/68] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.7.20/30 [110/66] via 15.30.7.74, 00:00:18, Serial0/3/0
O E2    15.30.7.48/30 [110/20] via 15.30.7.74, 00:00:18, Serial0/3/0
C       15.30.7.52/30 is directly connected, GigabitEthernet0/2
L       15.30.7.54/32 is directly connected, GigabitEthernet0/2
C       15.30.7.56/30 is directly connected, GigabitEthernet0/1
L       15.30.7.57/32 is directly connected, GigabitEthernet0/1
O E2    15.30.7.60/30 [110/20] via 15.30.7.74, 00:00:18, Serial0/3/0
O E2    15.30.7.64/30 [110/20] via 15.30.7.74, 00:00:18, Serial0/3/0
O       15.30.7.68/30 [110/128] via 15.30.7.74, 00:00:18, Serial0/3/0
C       15.30.7.72/30 is directly connected, Serial0/3/0
L       15.30.7.73/32 is directly connected, Serial0/3/0
C       15.30.7.76/30 is directly connected, Serial0/3/1
L       15.30.7.77/32 is directly connected, Serial0/3/1

配置文件：

interface GigabitEthernet0/0
 ip address 15.30.6.129 255.255.255.224
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 ip address 15.30.7.57 255.255.255.252
 duplex auto
 speed auto
!
interface GigabitEthernet0/2
 ip address 15.30.7.54 255.255.255.252
 duplex auto
 speed auto
!
interface Serial0/3/0
 ip address 15.30.7.73 255.255.255.252
!
interface Serial0/3/1
 ip address 15.30.7.77 255.255.255.252
 clock rate 2000000
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 log-adjacency-changes
 redistribute rip subnets 
 network 15.30.7.72 0.0.0.3 area 0
!
router rip
 version 2
 redistribute ospf 1 metric 2 
 passive-interface GigabitEthernet0/0
 network 15.0.0.0
 no auto-summary
1个回答

我们需要查看您的配置以确定，但请记住 OSPF 的管理距离低于（首选）RIP。因此，您的路由器更喜欢 OSPF 路由而不是 RIP 路由。

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