OSPF -默认路由并不是在所有区域都有广告。

Question

我试图找出为什么R1在他的路由表中没有默认路由，它是由我的Internet路由器传播和生成的。奇怪的是，R2实际上有一个默认路由的条目！

我很抱歉，如果这是一个非常奇怪的简单错误，很容易找到，但我只是找不到它(即使在长时间搜索和比较R1和R2之后)。

我可以这样平：

PC -----> R1
R1 -----> ABR
PC --!--> ABR
R1 --!--> Internet (I have simulated the Internet with a simple webserver)
R2 -----> Internet 
Router in the area down below the area 45 -----> Internet 

千兆位接口用于局域网，局域网被配置为被动接口.

以下是我的网络概述：

R1的配置：

en
 conf t
 no ip domain-lookup
 ipv6 unicast-routing

 int loopback 0
  ip address 1.1.1.1 255.255.255.255
  exit

 ipv6 router ospf 1
  router-id 1.1.1.1
  auto-cost reference-bandwidth 100000
  passive-interface g0/0
  area 45 range 2001:db8:18:4565::/56
  exit

 router ospf 1
  auto-cost reference-bandwidth 100000
  passive-interface g0/0
  area 45 range 10.45.65.0 255.255.255.0
  exit

 int s0/0/0
  ip address 10.45.0.6 255.255.255.252
  ipv6 address 2001:db8:18:4502::2/64
  ipv6 ospf 1 area 45
  ip ospf 1 area 45
  ip ospf hello-interval 3
  ipv6 ospf hello-interval 3
  no sh

 int g0/0
  ip address 10.45.65.1 255.255.255.0
  ipv6 add 2001:db8:18:4565::1/64
  no sh

  exit

 access-list 100 deny ip any host 224.0.0.5
 access-list 100 deny ip any host 244.0.0.6
 access-list 100 permit ip any any

 int g0/0
  ip access-group 100 in
 exit

R2的配置：

en
 conf t
 no ip domain-lookup
 ipv6 unicast-routing

 int loopback 0
  ip address 1.1.1.1 255.255.255.255
  exit

 ipv6 router ospf 1
  router-id 1.1.1.1
  auto-cost reference-bandwidth 100000
  exit

 router ospf 1
  auto-cost reference-bandwidth 100000
  network 10.45.0.0 0.0.0.3 area 45
  exit

 int s0/0/0
  ip address 10.45.0.2 255.255.255.252
  ipv6 address 2001:db8:18:4501::2/64
  ipv6 ospf 1 area 45
  ip ospf hello-interval 3
  ipv6 ospf hello-interval 3
  no sh

 int g0/0
  ip address 10.45.64.1 255.255.255.0
  ipv6 add 2001:db8:18:4564::1/64
  ipv6 ospf 1 area 45
  ip ospf hello-interval 3
  ipv6 ospf hello-interval 3
  no sh

  exit
  exit

ABR的配置：

en
 conf t
 no ip domain-lookup
 ipv6 unicast-routing

 int loopback 0
  ip address 2.2.1.1 255.255.255.255
  exit

 ipv6 router ospf 1
  area 45 range 2001:db8:18:4500::/56
  auto-cost reference-bandwidth 100000
  router-id 2.2.1.1
  exit

 router ospf 1
  area 45 range 10.45.0.0 255.255.0.0
  area 0 range 10.0.0.0 255.255.0.0
  auto-cost reference-bandwidth 100000
  network 10.45.0.0 0.0.0.255 area 45
  network 10.0.0.0 0.0.0.255 area 0

 int s0/1/0
  ip add 10.45.0.1 255.255.255.252
  ipv6 add 2001:db8:18:4501::1/64
  ipv6 ospf 1 area 45
  ip ospf hello-interval 3
  ipv6 ospf hello-interval 3
  no sh

 int s0/1/1
  ip add 10.45.0.5 255.255.255.252
  ipv6 add 2001:db8:18:4502::1/64
  ipv6 ospf 1 area 45
  ip ospf hello-interval 3
  ipv6 ospf hello-interval 3
  no sh

 int s0/0/0
  ip add 10.0.0.2 255.255.255.252
  ipv6 add 2001:db8:18:0001::2/64
  ipv6 ospf 1 area 0
  ip ospf hello-interval 3
  ipv6 ospf hello-interval 3
  no sh

 int s0/0/1
  ip add 10.0.0.6 255.255.255.252
  ipv6 add 2001:db8:18:0002::2/64
  ipv6 ospf 1 area 0
  ip ospf hello-interval 3
  ipv6 ospf hello-interval 3
  no sh

  exit

这是ABR上的“显示int"-command。

Serial0/1/0 is up, line protocol is up
  Internet address is 10.45.0.1/30, Area 45
  Process ID 1, Router ID 2.2.1.1, Network Type POINT-TO-POINT, Cost: 64
  Transmit Delay is 1 sec, State POINT-TO-POINT, Priority 0
  No designated router on this network
  No backup designated router on this network
  Timer intervals configured, Hello 3, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:02
  Index 1/1, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1 , Adjacent neighbor count is 1
    Adjacent with neighbor 1.1.1.1
  Suppress hello for 0 neighbor(s)
Serial0/1/1 is up, line protocol is up
  Internet address is 10.45.0.5/30, Area 45
  Process ID 1, Router ID 2.2.1.1, Network Type POINT-TO-POINT, Cost: 64
  Transmit Delay is 1 sec, State POINT-TO-POINT, Priority 0
  No designated router on this network
  No backup designated router on this network
  Timer intervals configured, Hello 3, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:02
  Index 2/2, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 0 msec, maximum is 0 msec
  Suppress hello for 0 neighbor(s)
Serial0/0/0 is up, line protocol is up
  Internet address is 10.0.0.2/30, Area 0
  Process ID 1, Router ID 2.2.1.1, Network Type POINT-TO-POINT, Cost: 64
  Transmit Delay is 1 sec, State POINT-TO-POINT, Priority 0
  No designated router on this network
  No backup designated router on this network
  Timer intervals configured, Hello 3, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:02
  Index 3/3, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1 , Adjacent neighbor count is 1
    Adjacent with neighbor 3.3.3.3
  Suppress hello for 0 neighbor(s)
Serial0/0/1 is up, line protocol is up
  Internet address is 10.0.0.6/30, Area 0
  Process ID 1, Router ID 2.2.1.1, Network Type POINT-TO-POINT, Cost: 64
  Transmit Delay is 1 sec, State POINT-TO-POINT, Priority 0
  No designated router on this network
  No backup designated router on this network
  Timer intervals configured, Hello 3, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:02
  Index 4/4, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1 , Adjacent neighbor count is 1
    Adjacent with neighbor 4.4.4.4
  Suppress hello for 0 neighbor(s)

R1上的命令没有显示任何内容。

Answer 1

错误是，我在R1和R2上配置了相同的路由器-id，但这不起作用！

两个路由器可以有相同的接触器-id，但不是当有相同的邻居！一个路由器不能通过连接两个具有相同路由器id的路由器来“做OSPF”！

然而，正如@Karl指出的那样，在两个或多个路由器上配置相同的路由器id总是一个问题，因为LSA包含广告路由器的路由器id。除此之外，还可能出现更多的问题。

但是，连接到PC1的R1仍然不能平移ABR.