FR上的OSPF之四：点到点
一、拓扑图
二、说明：实验在点到点子接口环境下的OSPF实验
三、配置
1. 将物理接口封装成FR模式
R1#show run int s0/0
interface Serial0/0
no ip address
encapsulation frame-relay
2. 在中心路由器起多个点到点的子接口，两个子接口属于不同的子网
在R1上配置
interface Serial0/0.1 point-to-point
ip address 12.1.1.1 255.255.255.0
frame-relay interface-dlci 102
!
interface Serial0/0.2 point-to-point
ip address 13.1.1.1 255.255.255.0
frame-relay interface-dlci 103
3. 在两个分支各起一个点到点的子接口到中心路由器
R3#show run int s0/0.2
Building configuration...
Current configuration : 114 bytes
!
interface Serial0/0.2 point-to-point
ip address 13.1.1.3 255.255.255.0
frame-relay interface-dlci 301
R2# show run int s0/0.1
Building configuration...
Current configuration : 114 bytes
!
interface Serial0/0.1 point-to-point
ip address 12.1.1.2 255.255.255.0
frame-relay interface-dlci 201
end
4. 在子接口配置IP地址，并配置frame-relay interface-dlci dlci号
四、总结
1. hello时间为10秒，发送的是组播包
2. 不选举DR，不用配置接口优先级
3. 邻居自动生成，不用手工配置
R2#debug ip ospf hello
OSPF hello events debugging is on
R2#
*Mar 1 00:23:23.663: OSPF: Send hello to 224.0.0.5 area 0 on Serial0/0.1 from 12.1.1.2
R2#
*Mar 1 00:23:27.067: OSPF: Rcv hello from 1.1.1.1 area 0 from Serial0/0.1 12.1.1.1
*Mar 1 00:23:27.071: OSPF: End of hello processing
R2#
*Mar 1 00:23:33.667: OSPF: Send hello to 224.0.0.5 area 0 on Serial0/0.1 from 12.1.1.2
R2#
*Mar 1 00:23:37.063: OSPF: Rcv hello from 1.1.1.1 area 0 from Serial0/0.1 12.1.1.1
*Mar 1 00:23:37.067: OSPF: End of hello processing
R1#show ip ospf neighbor det
Neighbor 3.3.3.3, interface address 13.1.1.3
In the area 0 via interface Serial0/0.2
Neighbor priority is 0, State is FULL, 6 state changes
DR is 0.0.0.0 BDR is 0.0.0.0
Options is 0x52
LLS Options is 0x1 (LR)
Dead timer due in 00:00:37
Neighbor is up for 00:10:20
Index 2/2, retransmission queue length 0, number of retransmission 1
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 1, maximum is 1
Last retransmission scan time is 0 msec, maximum is 0 msec
Neighbor 2.2.2.2, interface address 12.1.1.2
In the area 0 via interface Serial0/0.1
Neighbor priority is 0, State is FULL, 6 state changes
DR is 0.0.0.0 BDR is 0.0.0.0
Options is 0x52
LLS Options is 0x1 (LR)
Dead timer due in 00:00:31
Neighbor is up for 00:10:34
Index 1/1, retransmission queue length 0, number of retransmission 1
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 1, maximum is 1
Last retransmission scan time is 0 msec, maximum is 0 msec
Serial0/0.1 is up, line protocol is up
Internet Address 12.1.1.1/24, Area 0
Process ID 110, Router ID 1.1.1.1, Network Type POINT_TO_POINT, Cost: 64
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)
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 4 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 2.2.2.2
Suppress hello for 0 neighbor(s)
转载于:https://blog.51cto.com/liu008qing/455695