NA-NP-IE系列实验53：帧中继环境下BMA 模式-白红宇

实验53：帧中继环境下BMA 模式

实验目的

通过本实验可以掌握：

（1）帧中继静态映射及broadcast 参数的含义

（2）BMA 模式下的DR 选举

（3）BMA 模式下OSPF 的配置和调试

拓扑结构

实验拓扑

实验步骤

注：

（1）在Hub-and-Spoke 结构中，BMA 也要控制DR 选举，确保处于“Hub”端的路由器

为DR。

（2）BMA 模式下，邻居关系自动通过Hello 包建立和维持。

r1(config)#int loo 1

r1(config-if)#ip add

*Mar 1 00:03:08.331: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up

r1(config-if)#ip add 1.1.1.1 255.255.255.0

r1(config-if)#ip ospf net point-to-point

r1(config-if)#no sh

r1(config-if)#exit

r1(config)#int s0/0

r1(config-if)#ip add 172.16.1.1 255.255.255.0

r1(config-if)#enca frame

r1(config-if)#no sh

r1(config-if)#

*Mar 1 00:04:25.119: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up

r1(config-if)#

*Mar 1 00:04:36.119: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up

r1(config-if)#frame-relay map ip 172.16.1.2 101

r1(config-if)#frame-relay map ip 172.16.1.3 102 broadcast

r1(config-if)#frame-relay map ip 172.16.1.2 101 broadcast

r1(config-if)#frame-relay map ip 172.16.1.1 101

r1(config-if)#no fram inver

r1(config-if)#ip ospf net broadcast

r1(config-if)#no sh

r1(config-if)#exit

r1(config)#router ospf 1

r1(config-router)#router-id 1.1.1.1

r1(config-router)#net 1.1.1.0 0.0.0.255 area 0

r1(config-router)#net 172.16.1.0 0.0.0.255 area 0

r1(config-router)#

*Mar 1 00:10:27.735: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Serial0/0 from LOADING to FULL, Loading Done

r1(config-router)#do sh ip route

Codes: 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

Gateway of last resort is not set

1.0.0.0/24 is subnetted, 1 subnets

C 1.1.1.0 is directly connected, Loopback1

2.0.0.0/24 is subnetted, 1 subnets

O 2.2.2.0 [110/65] via 172.16.1.2, 00:02:28, Serial0/0

172.16.0.0/24 is subnetted, 1 subnets

C 172.16.1.0 is directly connected, Serial0/0

这里出现了一个问题，就是

没有到

3.3.3

的路由，可以通过关闭水平分割来解决：

r1(config-if)#no ip split-horizon

r1(config-router)#

*Mar 1 00:13:30.511: %OSPF-5-ADJCHG: Process 1, Nbr 3.3.3.3 on Serial0/0 from LOADING to FULL, Loading Done

r1(config-router)#exit

r1(config)#int s0/0

r1(config-if)#no ip s?

sap security service split-horizon

summary-address

r1(config-if)#no ip split-hori

r1(config-if)#no ip split-horizon

r1(config-if)#do sh ip route

Codes: 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

Gateway of last resort is not set

1.0.0.0/24 is subnetted, 1 subnets

C 1.1.1.0 is directly connected, Loopback1

2.0.0.0/24 is subnetted, 1 subnets

O 2.2.2.0 [110/65] via 172.16.1.2, 00:03:30, Serial0/0

3.0.0.0/24 is subnetted, 1 subnets

O 3.3.3.0 [110/65] via 172.16.1.3, 00:03:30, Serial0/0//

出现了到

3.3.3.3

的路由

172.16.0.0/24 is subnetted, 1 subnets

C 172.16.1.0 is directly connected, Serial0/0

r1(config-if)#do sh ip ospf int

Serial0/0 is up, line protocol is up

Internet Address 172.16.1.1/24, Area 0

Process ID 1, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 64

网络类型为BROADCAST

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 1.1.1.1, Interface address 172.16.1.1

Backup Designated router (ID) 3.3.3.3, Interface address 172.16.1.3

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

//BMA

模式下，Hello 周期为10 秒

oob-resync timeout 40

Hello due in 00:00:03

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 0 msec

Neighbor Count is 2, Adjacent neighbor count is 2

Adjacent with neighbor 2.2.2.2

Adjacent with neighbor 3.3.3.3 (Backup Designated Router)

Suppress hello for 0 neighbor(s)

Loopback1 is up, line protocol is up

Internet Address 1.1.1.1/24, Area 0

Process ID 1, Router ID 1.1.1.1, Network Type POINT_TO_POINT, Cost: 1

Transmit Delay is 1 sec, State POINT_TO_POINT,

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

oob-resync timeout 40

Supports Link-local Signaling (LLS)

Index 1/1, flood queue length 0

Next 0x0(0)/0x0(0)

Last flood scan length is 0, maximum is 0

Last flood scan time is 0 msec, maximum is 0 msec

Neighbor Count is 0, Adjacent neighbor count is 0

Suppress hello for 0 neighbor(s)

r1(config-if)#

r1(config-if)#do sh ip ospf nei detail

Neighbor 2.2.2.2, interface address 172.16.1.2

In the area 0 via interface Serial0/0

Neighbor priority is 1, State is FULL, 6 state changes

DR is 172.16.1.1 BDR is 172.16.1.2

Options is 0x52

LLS Options is 0x1 (LR)

Dead timer due in 00:00:38

Neighbor is up for 00:07:20

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

Neighbor 3.3.3.3, interface address 172.16.1.3

In the area 0 via interface Serial0/0

Neighbor priority is 1, State is FULL, 6 state changes

DR is 172.16.1.1 BDR is 172.16.1.3

Options is 0x52

LLS Options is 0x1 (LR)

Dead timer due in 00:00:31

Neighbor is up for 00:04:57

Index 2/2, 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(config-if)#

r2(config)#int loo 1

r2(config-if)#ip add 2..

*Mar 1 00:00:40.243: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up

r2(config-if)#ip add 2.2.2.2 255.255.255.0

r2(config-if)#ip ospf net point-to-point

r2(config-if)#exit

r2(config)#int s0/0

r2(config-if)#ip add 172.16.1.2 255.255.255.0

r2(config-if)#encap frame

r2(config-if)#no sh

r2(config-if)#

*Mar 1 00:01:27.967: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up

r2(config-if)#

*Mar 1 00:01:38.967: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up

r2(config-if)#fram map ip 172.16.1.1 201 broadcast

r2(config-if)#fram map ip 172.16.1.3 201 broadcast

r2(config-if)#fram map ip 172.16.1.2 201

r2(config-if)#no fram inver

r2(config-if)#ip ospf net broadcast

r2(config-if)#no sh

r2(config-if)#exit

r2(config)#router ospf 1

r2(config-router)#router-id 2.2.2.2

r2(config-router)#net 2.2.2.0

% Incomplete command.

r2(config-router)#net 2.2.2.0 0.0.0.255 area 0

r2(config-router)#net 172.16.1.0 0.0.0.255 area 0

r2(config-router)#

*Mar 1 00:10:27.983: %OSPF-5-ADJCHG: Process 1, Nbr 1.1.1.1 on Serial0/0 from LOADING to FULL, Loading Done

r2(config-router)#do sh ip route

Codes: 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

Gateway of last resort is not set

1.0.0.0/24 is subnetted, 1 subnets

O 1.1.1.0 [110/65] via 172.16.1.1, 00:02:44, Serial0/0

2.0.0.0/24 is subnetted, 1 subnets

C 2.2.2.0 is directly connected, Loopback1

172.16.0.0/24 is subnetted, 1 subnets

C 172.16.1.0 is directly connected, Serial0/0

r2(config-router)#do sh ip route

Codes: 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

Gateway of last resort is not set

1.0.0.0/24 is subnetted, 1 subnets

O 1.1.1.0 [110/65] via 172.16.1.1, 00:03:39, Serial0/0

2.0.0.0/24 is subnetted, 1 subnets

C 2.2.2.0 is directly connected, Loopback1

3.0.0.0/24 is subnetted, 1 subnets

O 3.3.3.0 [110/65] via 172.16.1.3, 00:03:39, Serial0/0

172.16.0.0/24 is subnetted, 1 subnets

C 172.16.1.0 is directly connected, Serial0/0

r2(config-router)#

r3(config)#int loo 1

r3(config-if)#ip add

*Mar 1 00:01:49.427: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up

r3(config-if)#ip add 3.3.3.3 255.255.255.0

r3(config-if)#ip ospf net point-to-point

r3(config-if)#exit

r3(config)#int s0/0

r3(config-if)#ip add 172.16.1.3 255.255.255.0

r3(config-if)#enca frame

r3(config-if)#no sh

r3(config-if)#

*Mar 1 00:02:48.631: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up

r3(config-if)#

*Mar 1 00:02:59.631: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up

r3(config-if)#fram map ip 172.16.1.1 302 broadcast

r3(config-if)#fram map ip 172.16.1.2 302 broadcast

r3(config-if)#fram map ip 172.16.1.3 302

r3(config-if)#no fram inver

r3(config-if)#ip ospf net broadcast

r3(config-if)#no sh

r3(config-if)#exit

r3(config)#router ospf 1

r3(config-router)#router-id 3.3.3.3

r3(config-router)#net 3.3.3.0 0.0.0.255 area 0

r3(config-router)#net 172.16.1.0 0.0.0.255 area 0

r3(config-router)#do sh ip route

Codes: 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

Gateway of last resort is not set

3.0.0.0/24 is subnetted, 1 subnets

C 3.3.3.0 is directly connected, Loopback1

172.16.0.0/24 is subnetted, 1 subnets

C 172.16.1.0 is directly connected, Serial0/0

r3(config-router)#

*Mar 1 00:13:30.847: %OSPF-5-ADJCHG: Process 1, Nbr 1.1.1.1 on Serial0/0 from LOADING to FULL, Loading Done

r3(config-router)#do sh ip route

Codes: 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

Gateway of last resort is not set

1.0.0.0/24 is subnetted, 1 subnets

O 1.1.1.0 [110/65] via 172.16.1.1, 00:03:45, Serial0/0

2.0.0.0/24 is subnetted, 1 subnets

O 2.2.2.0 [110/65] via 172.16.1.2, 00:03:45, Serial0/0

3.0.0.0/24 is subnetted, 1 subnets

C 3.3.3.0 is directly connected, Loopback1

172.16.0.0/24 is subnetted, 1 subnets

C 172.16.1.0 is directly connected, Serial0/0

r3(config-router)#do sh

本文转自gauyanm 51CTO博客，原文链接：http://blog.51cto.com/gauyanm/245914，如需转载请自行联系原作者