GRE 隧道一侧的路由器未通过隧道添加 OSPF 路由，而另一侧的路由器则

网络工程 路由 虚拟专用网 ospf 联网 格雷
2022-02-01 21:54:53

在此处输入图像描述

我已经使用以下命令在 Dublin 和 Carlow 路由器之间配置了 GRE 隧道：

//Carlow
int tunnel 0 
ip address 172.16.12.1 255.255.255.252
tunnel source s0/0/0
tunnel destination 87.44.50.6

//Dublin
int tunnel 0 
ip address 172.16.12.2 255.255.255.252
tunnel source s0/0/0
tunnel destination 87.44.50.2

隧道的网络地址为 172.16.12.0/30（都柏林 = 172.16.12.2，卡洛 = 172.16.12.1）。

Ping 通过隧道成功，因此我尝试配置 OSPF 以允许 LAN 之间的路由。

我使用以下命令来配置 OSPF：

//Carlow 
router ospf 2
network 172.16.12.0 0.0.0.3 area 0
network 87.44.50.24 0.0.0.7 area 0

//Dublin
router ospf 2
network 172.16.12.0 0.0.0.3 area 0
network 87.44.50.16 0.0.0.7 area 0

到目前为止，此配置的结果是：

  • 在 Carlow 路由器上，通过 172.16.12.1（都柏林路由器上的隧道接口）添加了到 87.44.50.16 的 OSPF 路由

  • 在 Dublin 路由器上，没有添加任何 OSPF 路由。

我将在每个路由器的运行配置下方添加 OSPf

卡洛：

router ospf 2
 log-adjacency-changes
 network 172.16.12.0 0.0.0.3 area 0
 network 84.44.50.24 0.0.0.7 area 0
!
router ospf 1
 log-adjacency-changes
 network 87.44.50.4 0.0.0.3 area 0

都柏林：

router ospf 2
 log-adjacency-changes
 network 172.16.12.0 0.0.0.3 area 0
 network 87.44.50.16 0.0.0.7 area 0
!
router ospf 1
 log-adjacency-changes
 network 87.44.50.0 0.0.0.3 area 0

根据要求，我将为每个路由器添加完整的配置和路由表。

卡洛配置

version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
no ip cef
no ipv6 cef
!
license udi pid CISCO2901/K9 sn FTX1524Z6TY-
!
spanning-tree mode pvst
!
interface Tunnel0
 ip address 172.16.12.2 255.255.255.252
 mtu 1476
 tunnel source Serial0/0/0
 tunnel destination 87.44.50.2
!
interface GigabitEthernet0/0
 ip address 87.44.50.25 255.255.255.252
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 ip address 87.44.50.6 255.255.255.252
 clock rate 2000000
!
interface Serial0/0/1
 no ip address
 clock rate 2000000
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 2
 log-adjacency-changes
 network 172.16.12.0 0.0.0.3 area 0
 network 84.44.50.24 0.0.0.7 area 0
!
router ospf 1
 log-adjacency-changes
 network 87.44.50.4 0.0.0.3 area 0
!
ip classless
ip route 0.0.0.0 0.0.0.0 87.44.50.5 
!
ip flow-export version 9
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
end

Carlow - 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 87.44.50.5 to network 0.0.0.0

     87.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C       87.44.50.4/30 is directly connected, Serial0/0/0
L       87.44.50.6/32 is directly connected, Serial0/0/0
O       87.44.50.16/30 [110/1001] via 172.16.12.1, 00:04:36, Tunnel0
C       87.44.50.24/30 is directly connected, GigabitEthernet0/0
L       87.44.50.25/32 is directly connected, GigabitEthernet0/0
     172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C       172.16.12.0/30 is directly connected, Tunnel0
L       172.16.12.2/32 is directly connected, Tunnel0
S*   0.0.0.0/0 [1/0] via 87.44.50.5

都柏林 - 配置

version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
no ip cef
no ipv6 cef
!
license udi pid CISCO2901/K9 sn FTX152479Q8-
license boot module c2900 technology-package securityk9
!
spanning-tree mode pvst
!
interface Tunnel0
 ip address 172.16.12.1 255.255.255.252
 mtu 1476
 tunnel source Serial0/0/0
 tunnel destination 87.44.50.6
!
interface GigabitEthernet0/0
 ip address 87.44.50.17 255.255.255.252
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 ip address 87.44.50.2 255.255.255.252
 clock rate 2000000
!
interface Serial0/0/1
 no ip address
 clock rate 2000000
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 2
 log-adjacency-changes
 network 172.16.12.0 0.0.0.3 area 0
 network 87.44.50.16 0.0.0.7 area 0
!
router ospf 1
 log-adjacency-changes
 network 87.44.50.0 0.0.0.3 area 0
!
ip classless
ip route 0.0.0.0 0.0.0.0 87.44.50.1 
!
ip flow-export version 9
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
end

都柏林 - 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 87.44.50.1 to network 0.0.0.0

     87.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C       87.44.50.0/30 is directly connected, Serial0/0/0
L       87.44.50.2/32 is directly connected, Serial0/0/0
C       87.44.50.16/30 is directly connected, GigabitEthernet0/0
L       87.44.50.17/32 is directly connected, GigabitEthernet0/0
     172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C       172.16.12.0/30 is directly connected, Tunnel0
L       172.16.12.1/32 is directly connected, Tunnel0
S*   0.0.0.0/0 [1/0] via 87.44.50.1
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