2017年2月5日 星期日

OSPF Virtual Link



R1#
R1#show ip route
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
       i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C        10.1.1.0/24 is directly connected, Loopback0
L        10.1.1.1/32 is directly connected, Loopback0
C        10.1.2.0/24 is directly connected, Loopback1
L        10.1.2.1/32 is directly connected, Loopback1
C        10.1.3.0/24 is directly connected, Loopback2
L        10.1.3.1/32 is directly connected, Loopback2
      192.168.0.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.0.0/30 is directly connected, Serial1/0
L        192.168.0.1/32 is directly connected, Serial1/0
      192.168.1.0/30 is subnetted, 1 subnets
O IA     192.168.1.0 [110/128] via 192.168.0.2, 00:00:07, Serial1/0
R1#
R1#
R1#sh ip ospf nei

Neighbor ID     Pri   State           Dead Time   Address         Interface
2.2.2.2           0   FULL/  -           -        192.168.0.2     OSPF_VL0
2.2.2.2           0   FULL/  -        00:00:38    192.168.0.2     Serial1/0
R1#

R1#show ip ospf virtual-links 
Virtual Link OSPF_VL0 to router 2.2.2.2 is up
  Run as demand circuit
  DoNotAge LSA allowed.
  Transit area 1, via interface Serial1/0
 Topology-MTID    Cost    Disabled     Shutdown      Topology Name
        0           64        no          no            Base
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:02
    Adjacency State FULL (Hello suppressed)
    Index 1/2, retransmission queue length 0, number of retransmission 0
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 0, maximum is 0
    Last retransmission scan time is 0 msec, maximum is 0 msec
R1#


R1#
R1#
R1#show run
Building configuration...

hostname R1
!
interface Loopback0
 ip address 10.1.1.1 255.255.255.0
!
interface Loopback1
 ip address 10.1.2.1 255.255.255.0
!
interface Loopback2
 ip address 10.1.3.1 255.255.255.0
!
interface Serial1/0
 ip address 192.168.0.1 255.255.255.252
!         
router ospf 1
 router-id 1.1.1.1
 area 1 virtual-link 2.2.2.2
 network 10.1.1.0 0.0.0.255 area 0
 network 10.1.2.0 0.0.0.255 area 0
 network 10.1.3.0 0.0.0.255 area 0
 network 192.168.0.0 0.0.0.3 area 1
!
line con 0
line vty 0 4
!
end       


R1#   



R2#show ip route
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
       i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is not set

      10.0.0.0/32 is subnetted, 3 subnets
O        10.1.1.1 [110/65] via 192.168.0.1, 00:02:55, Serial1/0
O        10.1.2.1 [110/65] via 192.168.0.1, 00:02:55, Serial1/0
O        10.1.3.1 [110/65] via 192.168.0.1, 00:02:55, Serial1/0
      192.168.0.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.0.0/30 is directly connected, Serial1/0
L        192.168.0.2/32 is directly connected, Serial1/0
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/30 is directly connected, Serial1/1
L        192.168.1.2/32 is directly connected, Serial1/1
R2#
R2#
R2#show ip ospf virtual-links 
Virtual Link OSPF_VL0 to router 1.1.1.1 is up
  Run as demand circuit
  DoNotAge LSA allowed.
  Transit area 1, via interface Serial1/0
 Topology-MTID    Cost    Disabled     Shutdown      Topology Name
        0           64        no          no            Base
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:08
    Adjacency State FULL (Hello suppressed)
    Index 1/3, retransmission queue length 0, number of retransmission 0
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 0, maximum is 0
    Last retransmission scan time is 0 msec, maximum is 0 msec
R2#
R2#show ip ospf neighbor 

Neighbor ID     Pri   State           Dead Time   Address         Interface
1.1.1.1           0   FULL/  -           -        192.168.0.1     OSPF_VL0
1.1.1.1           0   FULL/  -        00:00:31    192.168.0.1     Serial1/0
3.3.3.3           0   FULL/  -        00:00:37    192.168.1.1     Serial1/1
R2#


R2#
R2#sh run
Building configuration...
!
hostname R2
!
interface Serial1/0
 ip address 192.168.0.2 255.255.255.252
!
interface Serial1/1
 ip address 192.168.1.2 255.255.255.252
!
router ospf 1
 router-id 2.2.2.2
 area 1 virtual-link 1.1.1.1
 network 10.2.2.0 0.0.0.255 area 2
 network 192.168.0.0 0.0.0.3 area 1
 network 192.168.1.0 0.0.0.3 area 2
!
line con 0
line vty 0 4
!
end

R2#



R3#show run
Building configuration...
!
hostname R3
!         
interface Serial1/1
 ip address 192.168.1.1 255.255.255.252
!
router ospf 1
 router-id 3.3.3.3
 network 192.168.1.0 0.0.0.3 area 2
!
line con 0
line vty 0 4
!
end

R3#

R3#
R3#show ip route
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
       i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is not set

      10.0.0.0/32 is subnetted, 3 subnets
O IA     10.1.1.1 [110/129] via 192.168.1.2, 00:07:40, Serial1/1
O IA     10.1.2.1 [110/129] via 192.168.1.2, 00:07:40, Serial1/1
O IA     10.1.3.1 [110/129] via 192.168.1.2, 00:07:40, Serial1/1
      192.168.0.0/30 is subnetted, 1 subnets
O IA     192.168.0.0 [110/128] via 192.168.1.2, 00:07:44, Serial1/1
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/30 is directly connected, Serial1/1
L        192.168.1.1/32 is directly connected, Serial1/1
R3#  
R3#
R3#show ip ospf nei

Neighbor ID     Pri   State           Dead Time   Address         Interface
2.2.2.2           0   FULL/  -        00:00:37    192.168.1.2     Serial1/1
R3#
R3#

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