ospf的网络类型

一、帧中继启多点子接口：



1.FRpoint-to-multipoint网络类型

FR#show run
Building configuration...!
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 102 interface Serial1/1 201
frame-relay route 103 interface Serial1/2 301
frame-relay route 104 interface Serial1/3 401
!
interface Serial1/1
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 201 interface Serial1/0 102
!
interface Serial1/2
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 301 interface Serial1/0 103
!
interface Serial1/3
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 401 interface Serial1/0 104
!

R1#show run
Building configuration...

interface Loopback0
ip address 1.1.1.1 255.255.255.0

interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
no frame-relay inverse-arp
!
interface Serial1/0.1 multipoint
ip address 10.1.1.1 255.255.255.0
ip ospf network point-to-multipoint / /FR的网络类型point-to-multipoint
frame-relay map ip 10.1.1.1 102 broadcast
frame-relay map ip 10.1.1.4 104 broadcast
frame-relay map ip 10.1.1.3 103 broadcast
frame-relay map ip 10.1.1.2 102 broadcast

router ospf 1
router-id 1.1.1.1
network 1.1.1.0 0.0.0.255 area 1
network 10.1.1.0 0.0.0.255 area 1
!

R2#show run
Building configuration...

interface Loopback0
ip address 2.2.2.2 255.255.255.0

interface Serial1/0
ip address 10.1.1.2 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint
serial restart-delay 0
frame-relay map ip 10.1.1.4 201 broadcast
frame-relay map ip 10.1.1.3 201 broadcast
frame-relay map ip 10.1.1.2 201 broadcast
frame-relay map ip 10.1.1.1 201 broadcast
frame-relay lmi-type cisco

router ospf 1
router-id 2.2.2.2
network 2.2.2.0 0.0.0.255 area 1
network 10.1.1.0 0.0.0.255 area 1

R3#show run
Building configuration...
interface Loopback0
ip address 3.3.3.3 255.255.255.0
!
interface Serial1/0
ip address 10.1.1.3 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint
serial restart-delay 0
frame-relay map ip 10.1.1.4 301 broadcast
frame-relay map ip 10.1.1.3 301 broadcast
frame-relay map ip 10.1.1.2 301 broadcast
frame-relay map ip 10.1.1.1 301 broadcast
frame-relay lmi-type cisco
!
router ospf 1
router-id 3.3.3.3
network 3.3.3.0 0.0.0.255 area 1
network 10.1.1.0 0.0.0.255 area 1
!

R4#show run
Building configuration...

interface Loopback0
ip address 4.4.4.4 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex full
!
interface Serial1/0
ip address 10.1.1.4 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint
serial restart-delay 0
frame-relay map ip 10.1.1.4 401 broadcast
frame-relay map ip 10.1.1.3 401 broadcast
frame-relay map ip 10.1.1.2 401 broadcast
frame-relay map ip 10.1.1.1 401 broadcast
frame-relay lmi-type cisco

router ospf 1
router-id 4.4.4.4
network 4.4.4.0 0.0.0.255 area 1
network 10.1.1.0 0.0.0.255 area 1
!

R1#show ip route

1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 1.1.1.0/24 is directly connected, Loopback0
L 1.1.1.1/32 is directly connected, Loopback0
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/65] via 10.1.1.2, 00:22:34, Serial1/0.1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/65] via 10.1.1.3, 00:17:18, Serial1/0.1
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/65] via 10.1.1.4, 00:15:07, Serial1/0.1
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C 10.1.1.0/24 is directly connected, Serial1/0.1
L 10.1.1.1/32 is directly connected, Serial1/0.1
O 10.1.1.2/32 [110/64] via 10.1.1.2, 00:22:34, Serial1/0.1
O 10.1.1.3/32 [110/64] via 10.1.1.3, 00:17:18, Serial1/0.1
O 10.1.1.4/32 [110/64] via 10.1.1.4, 00:15:07, Serial1/0.1
R1#show ip ospf interface brief
Interface PID Area IP Address/Mask Cost State Nbrs F/C
Lo0 1 1 1.1.1.1/24 1 LOOP 0/0
Se1/0.1 1 1 10.1.1.1/24 64 P2MP 3/3
R1#show ip ospf nei

Neighbor ID Pri State Dead Time Address Interface
4.4.4.4 0 FULL/ - 00:01:45 10.1.1.4 Serial1/0.1
3.3.3.3 0 FULL/ - 00:01:47 10.1.1.3 Serial1/0.1
2.2.2.2 0 FULL/ - 00:01:32 10.1.1.2 Serial1/0.1

R1#show ip ospf inter s1/0.1
Serial1/0.1 is up, line protocol is up
Internet Address 10.1.1.1/24, Area 1, Attached via Network Statement
Process ID 1, Router ID 1.1.1.1, Network Type POINT_TO_MULTIPOINT, Cost: 64
Topology-MTID Cost Disabled Shutdown Topology Name
0 64 no no Base
Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
oob-resync timeout 120
Hello due in 00:00:14
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
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 4 msec
Neighbor Count is 3, Adjacent neighbor count is 3
Adjacent with neighbor 4.4.4.4
Adjacent with neighbor 3.3.3.3
Adjacent with neighbor 2.2.2.2
Suppress hello for 0 neighbor(s)

R2#show ip route

1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/65] via 10.1.1.1, 00:27:07, Serial1/0
2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 2.2.2.0/24 is directly connected, Loopback0
L 2.2.2.2/32 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/129] via 10.1.1.1, 00:21:41, Serial1/0
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/129] via 10.1.1.1, 00:19:39, Serial1/0
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C 10.1.1.0/24 is directly connected, Serial1/0
O 10.1.1.1/32 [110/64] via 10.1.1.1, 00:27:07, Serial1/0
L 10.1.1.2/32 is directly connected, Serial1/0
O 10.1.1.3/32 [110/128] via 10.1.1.1, 00:21:41, Serial1/0
O 10.1.1.4/32 [110/128] via 10.1.1.1, 00:19:39, Serial1/0
R2#show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 0 FULL/ - 00:01:38 10.1.1.1 Serial1/0
R2#show ip ospf in
R2#show ip ospf interface s1/0
Serial1/0 is up, line protocol is up
Internet Address 10.1.1.2/24, Area 1, Attached via Network Statement
Process ID 1, Router ID 2.2.2.2, Network Type POINT_TO_MULTIPOINT, Cost: 64
Topology-MTID Cost Disabled Shutdown Topology Name
0 64 no no Base
Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
oob-resync timeout 120
Hello due in 00:00:09
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
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
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 1.1.1.1
Suppress hello for 0 neighbor(s)
2.FR默认网络类型R1#show ip route 1.0.0.0/8 is variably subnetted, 2 subnets, 2 masksC 1.1.1.0/24 is directly connected, Loopback0L 1.1.1.1/32 is directly connected, Loopback0 2.0.0.0/32 is subnetted, 1 subnetsO 2.2.2.2 [110/65] via 10.1.1.2, 00:00:42, Serial1/0.1 10.0.0.0/8 is variably subnetted, 2 subnets, 2 masksC 10.1.1.0/24 is directly connected, Serial1/0.1L 10.1.1.1/32 is directly connected, Serial1/0.1R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface2.2.2.2 1 2WAY/DROTHER 00:01:56 10.1.1.2 Serial1/0.13.3.3.3 1 FULL/DR 00:01:55 10.1.1.3 Serial1/0.14.4.4.4 1 FULL/BDR 00:01:55 10.1.1.4 Serial1/0.1R1#show ip ospf*Sep 26 15:04:08.603: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Serial1/0.1 from LOADING to FULL, Loading DoneR1#show ip ospf interface s1/0.1Serial1/0.1 is up, line protocol is up Internet Address 10.1.1.1/24, Area 1, Attached via Network Statement Process ID 1, Router ID 1.1.1.1, Network Type NON_BROADCAST, Cost: 64 Topology-MTID Cost Disabled Shutdown Topology Name 0 64 no no Base Transmit Delay is 1 sec, State BDR, Priority 1 Designated Router (ID) 4.4.4.4, Interface address 10.1.1.4 Backup Designated router (ID) 1.1.1.1, Interface address 10.1.1.1 Old designated Router (ID) 3.3.3.3, Interface address 10.1.1.3 Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5 oob-resync timeout 120 Hello due in 00:00:00 Supports Link-local Signaling (LLS) Cisco NSF helper support enabled IETF NSF helper support enabled 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 4 msec, maximum is 4 msec Neighbor Count is 3, Adjacent neighbor count is 3 Adjacent with neighbor 2.2.2.2 Adjacent with neighbor 3.3.3.3 Adjacent with neighbor 4.4.4.4 (Designated Router) Suppress hello for 0 neighbor(s) 3.FR point-to-multipoint none_brodcast 网络类型R1(config)#int s1/0.1R1(config-subif)#ip ospf network point-to-multipoint non-broadcast R1(config-subif)#enR1#show ip route / /没有指邻居之前查看路由表 1.0.0.0/8 is variably subnetted, 2 subnets, 2 masksC 1.1.1.0/24 is directly connected, Loopback0L 1.1.1.1/32 is directly connected, Loopback0 10.0.0.0/8 is variably subnetted, 2 subnets, 2 masksC 10.1.1.0/24 is directly connected, Serial1/0.1L 10.1.1.1/32 is directly connected, Serial1/0.1 R1(config)#router ospf 1*Sep 26 15:39:17.011: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Serial1/0.1 from LOADING to FULL, Loading DoneR1(config-router)#neighbor 10.1.1.2R1(config-router)#neighbor 10.1.1.3R1(config-router)#neighbor 10.1.1.4R1(config-router)#end R1#show ip route //指邻居之后查看路由表downloaded static route, H - NHRP, l - LISP 1.0.0.0/8 is variably subnetted, 2 subnets, 2 masksC 1.1.1.0/24 is directly connected, Loopback0L 1.1.1.1/32 is directly connected, Loopback0 2.0.0.0/32 is subnetted, 1 subnetsO 2.2.2.2 [110/65] via 10.1.1.2, 00:02:05, Serial1/0.1 3.0.0.0/32 is subnetted, 1 subnetsO 3.3.3.3 [110/65] via 10.1.1.3, 00:01:15, Serial1/0.1 4.0.0.0/32 is subnetted, 1 subnetsO 4.4.4.4 [110/65] via 10.1.1.4, 00:01:15, Serial1/0.1 10.0.0.0/8 is variably subnetted, 5 subnets, 2 masksC 10.1.1.0/24 is directly connected, Serial1/0.1L 10.1.1.1/32 is directly connected, Serial1/0.1O 10.1.1.2/32 [110/64] via 10.1.1.2, 00:02:05, Serial1/0.1O 10.1.1.3/32 [110/64] via 10.1.1.3, 00:01:15, Serial1/0.1O 10.1.1.4/32 [110/64] via 10.1.1.4, 00:01:15, Serial1/0.1 R1#show ip ospf interface brief Interface PID Area IP Address/Mask Cost State Nbrs F/CLo0 1 1 1.1.1.1/24 1 LOOP 0/0Se1/0.1 1 1 10.1.1.1/24 64 P2MP 3/3R1#show ip ospf in R1#show ip ospf interface s1/0%OSPF: OSPF not enabled on Serial1/0R1#show ip ospf interface s1/0.1Serial1/0.1 is up, line protocol is up Internet Address 10.1.1.1/24, Area 1, Attached via Network Statement Process ID 1, Router ID 1.1.1.1, Network Type POINT_TO_MULTIPOINT, Cost: 64 Topology-MTID Cost Disabled Shutdown Topology Name 0 64 no no Base Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5 oob-resync timeout 120 Hello due in 00:00:03 Supports Link-local Signaling (LLS) Cisco NSF helper support enabled IETF NSF helper support enabled Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 2 Last flood scan time is 0 msec, maximum is 4 msec Neighbor Count is 3, Adjacent neighbor count is 3 Adjacent with neighbor 4.4.4.4 Adjacent with neighbor 3.3.3.3 Adjacent with neighbor 2.2.2.2 Suppress hello for 0 neighbor(s) R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface4.4.4.4 0 FULL/ - 00:01:57 10.1.1.4 Serial1/0.13.3.3.3 0 FULL/ - 00:01:42 10.1.1.3 Serial1/0.12.2.2.2 0 FULL/ - 00:01:39 10.1.1.2 Serial1/0.1 4.FR point-to-point 网络类型R1#show ip ospf interface s1/0.1Serial1/0.1 is up, line protocol is up Internet Address 10.1.1.1/24, Area 1, Attached via Network Statement Process ID 1, Router ID 1.1.1.1, Network Type POINT_TO_POINT, Cost: 64 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 oob-resync timeout 40 Hello due in 00:00:05 Supports Link-local Signaling (LLS) Cisco NSF helper support enabled IETF NSF helper support enabled Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 2 Last flood scan time is 0 msec, maximum is 4 msec Neighbor Count is 1, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s)*Sep 26 16:09:01.995: %OSPF-5-ADJCHG: Process 1, Nbr 3.3.3.3 on Serial1/0.1 from LOADING to FULL, Loading Done 5.FR broadcast 网络类型R1#show ip ospf int s1/0.1Serial1/0.1 is up, line protocol is up Internet Address 10.1.1.1/24, Area 1, Attached via Network Statement Process ID 1, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 64 Topology-MTID Cost Disabled Shutdown Topology Name 0 64 no no Base Transmit Delay is 1 sec, State BDR, Priority 1 Designated Router (ID) 3.3.3.3, Interface address 10.1.1.3 Backup Designated router (ID) 1.1.1.1, Interface address 10.1.1.1 Old designated Router (ID) 2.2.2.2, Interface address 10.1.1.2 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 oob-resync timeout 40 Hello due in 00:00:09 Supports Link-local Signaling (LLS) Cisco NSF helper support enabled IETF NSF helper support enabled Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 0, maximum is 2 Last flood scan time is 0 msec, maximum is 4 msec Neighbor Count is 3, Adjacent neighbor count is 3 Adjacent with neighbor 2.2.2.2 Adjacent with neighbor 3.3.3.3 (Designated Router) Adjacent with neighbor 4.4.4.4 Suppress hello for 0 neighbor(s)R1#R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface2.2.2.2 1 FULL/DROTHER 00:00:35 10.1.1.2 Serial1/0.13.3.3.3 1 FULL/DR 00:00:38 10.1.1.3 Serial1/0.14.4.4.4 1 FULL/DROTHER 00:00:39 10.1.1.4 Serial1/0.1R1#R3#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface1.1.1.1 1 FULL/BDR 00:00:30 10.1.1.1 Serial1/0 总结：
在多点子接口下，FR网络类型为point-to-multipoint时，建立领居关系，不选DR/BDR，
Hello 30, Dead 120, Wait 120,
FR的默认Network Type NON_BROADCAST ，建立邻居关系，选DR、BDR。Hello 30, Dead 120, Wait 120 point-to-multipoint non-broadcast，在该网络类型下，邻居不能自动发现，所以需要手动指定邻居，不需要选举DR、BDR，网络类型显示为Network Type POINT_TO_MULTIPOINT, Hello 30, Dead 120, Wait 120； point-to-point，在该网络类型下，邻居不能自动发现，所以需要手动指定邻居，不需要选举DR、BDR，网络类型显示为POINT_TO_POINT,, Hello 30, Dead 120, Wait 120； 在bradcast网络类型下，邻居自动发现，所以不需要手动指定邻居，由于是多路访问的环境，所以需要选举DR，Hello 10, Dead 40, Wait 40,