上次提到了Cisco Document中 帧中继 配置和故障处理指南（上）
根据上面的指南，我们可以轻松地搭建在帧中继网络环境，并在其中中配置OSPF。
总体来说，我们根据这个表格来完成一下实验。
一、RFC定义的NBMA网络环境
以下配置实验参考了红头发的方法，完全可以参考本文开始提到的指南进行FR环境搭建，冷博客也实验成功了。
拓扑图来自cisco document(改)
1.配置命令
Spicey
interface Serial0/0
ip address 17.1.1.1 255.255.255.0
encapsulation frame-relay
ip ospf 11 area 0
no arp frame-relay
frame-relay map ip 17.1.1.2 102 broadcast
frame-relay map ip 17.1.1.3 103 broadcast
no frame-relay inverse-arp
router ospf 11
neighbor 17.1.1.2
neighbor 17.1.1.3
*说明：这里没有显示配置命令：neighbor 17.1.1.2 priority 0 和 neighbor 17.1.1.3 priority 0
这样阻止两个Hub路由器选作DR
Praslt
interface Loopback0
ip address 2.2.2.2 255.255.255.255
ip ospf 111 area 1
!
interface Serial0/0
ip address 17.1.1.2 255.255.255.0
encapsulation frame-relay
ip ospf 111 area 1
no arp frame-relay
frame-relay map ip 17.1.1.1 201 broadcast
no frame-relay inverse-arp
router ospf 111
log-adjacency-changes
neighbor 17.1.1.1
Aton
interface Loopback0
ip address 3.3.3.3 255.255.255.255
ip ospf 1 area 0
!
interface Serial0/0
ip address 17.1.1.3 255.255.255.0
encapsulation frame-relay
ip ospf 1 area 0
no arp frame-relay
frame-relay map ip 17.1.1.1 301 broadcast
no frame-relay inverse-arp
router ospf 1
neighbor 172.1.1.1
2.测试与改进
Aton#sh ip ospf inter s 0/0
Serial0/0 is up, line protocol is up
Internet Address 17.1.1.3/24, Area 0
Process ID 1, Router ID 3.3.3.3, Network Type NON_BROADCAST, Cost: 64
….
这里端口类型默认为Non_broadcast，所以没有修改。
Aton#sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
17.1.1.1 1 FULL/DR 00:01:58 17.1.1.1 Serial0/0
可以看到spoke路由器为DR，并且FULL邻接状态。
Aton#sh ip route ospf
2.0.0.0/32 is subnetted, 1 subnets
O IA 2.2.2.2 [110/65] via 17.1.1.2, 00:19:31, Serial0/0
可以学到来自Praslt的IA路由条目。
Aton#p 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
…..
Success rate is 0 percent (0/5)
ping不通，虽然有路由条目和出口，还需要做一个DLCI复用，参见：帧中继 配置和故障处理指南（上）
配置：
Praslt(config)#inter s 0/0
Praslt(config-if)#frame-relay map ip 17.1.1.3 201
Aton(config)#inter s 0/0
Aton(config-if)#frame-relay map ip 17.1.1.2 301
Aton#p 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 288/373/476 ms
二、RFC定义的P2M网络环境
网络拓扑参见第一部分。
1.配置命令
Spicey
interface Serial0/0
ip address 10.1.1.1 255.255.255.248
encapsulation frame-relay
ip ospf network point-to-multipoint
no arp frame-relay
frame-relay map ip 10.1.1.2 102 broadcast
frame-relay map ip 10.1.1.3 103 broadcast
no frame-relay inverse-arp
router ospf 11
network 10.1.1.1 0.0.0.0 area 0
Praslt
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface Serial0/0
ip address 10.1.1.2 255.255.255.248
encapsulation frame-relay
ip ospf network point-to-multipoint
no arp frame-relay
frame-relay map ip 10.1.1.1 201 broadcast
no frame-relay inverse-arp
router ospf 11
network 2.2.2.2 0.0.0.0 area 1
network 10.1.1.2 0.0.0.0 area 0
*注意：做p2m的时候，两个spoke路由器无需做DLCI复用。
Aton
interface Serial0/0
no ip address
encapsulation frame-relay
no arp frame-relay
no frame-relay inverse-arp
!
interface Serial0/0.1 multipoint
ip address 10.1.1.3 255.255.255.248
frame-relay map ip 10.1.1.1 301
ip ospf network point-to-multipoint
*注意：没有修改网络类型，可以正常建立邻接关系，无法学习和发出路由条目。
2.测试
Spicey#sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
10.1.1.2 0 FULL/ - 00:01:46 10.1.1.2 Serial0/0
10.1.1.3 0 FULL/ - 00:01:46 10.1.1.3 Serial0/0
Spicey#sh ip route ospf
O IA 2.2.2.2 [110/65] via 10.1.1.2, 00:00:22, Serial0/0
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
O 10.1.1.2/32 [110/64] via 10.1.1.2, 00:00:22, Serial0/0
三、Cisco自有的NBMA P2M网络环境
1.配置命令
Spicey
interface Serial0/0
ip address 10.1.1.1 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint non-broadcast
serial restart-delay 0
no arp frame-relay
frame-relay map ip 10.1.1.2 102 broadcast
frame-relay map ip 10.1.1.3 103 broadcast
no frame-relay inverse-arp
frame-relay lmi-type ansi
router ospf 11
network 0.0.0.0 255.255.255.255 area 0
neighbor 10.1.1.3
neighbor 10.1.1.2
Praslt
interface Serial0/0
ip address 10.1.1.2 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint non-broadcast
serial restart-delay 0
no arp frame-relay
frame-relay map ip 10.1.1.1 201 broadcast
no frame-relay inverse-arp
router ospf 11
network 0.0.0.0 255.255.255.255 area 0
Aton
interface Serial0/0
ip address 10.1.1.3 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint non-broadcast
serial restart-delay 0
no arp frame-relay
frame-relay map ip 10.1.1.1 301 broadcast
no frame-relay inverse-arp
frame-relay lmi-type ansi
router ospf 11
network 0.0.0.0 255.255.255.255 area 0
2.测试
Spicey#sh ip os nei
Neighbor ID Pri State Dead Time Address Interface
10.1.1.3 0 FULL/ - 00:01:56 10.1.1.3 Serial0/0
10.1.1.2 0 FULL/ - 00:01:56 10.1.1.2 Serial0/0
四、Cisco自有的P2P网络环境
拓扑图大概如上面，Aton只有s0，Praslt只有S0.1
1.配置命令
Spicey
interface Serial0/0
no ip address
encapsulation frame-relay
serial restart-delay 0
no arp frame-relay
no frame-relay inverse-arp
!
interface Serial0/0.1 point-to-point
ip address 10.1.1.1 255.255.255.0
frame-relay interface-dlci 102
!
interface Serial0/0.2 point-to-point
ip address 20.1.1.1 255.255.255.0
frame-relay interface-dlci 103
*注意：需要本地DLCI frame-relay interface-dlci 103 ,子接口继承物理接口属性。
router ospf 11
network 0.0.0.0 255.255.255.255 area 0
Praslt
interface Serial0/0
no ip address
encapsulation frame-relay
no arp frame-relay
no frame-relay inverse-arp
!
interface Serial0/0.1 point-to-point
ip address 10.1.1.2 255.255.255.0
frame-relay interface-dlci 201
router ospf 11
network 0.0.0.0 255.255.255.255 area 0
Aton
interface Serial0/0
ip address 20.1.1.2 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-point
serial restart-delay 0
no arp frame-relay
frame-relay map ip 20.1.1.1 301 broadcast
no frame-relay inverse-arp
frame-relay lmi-type ansi
*注意：这里仍然要做DLCI映射，指定端口类型point-to-point
router ospf 11
network 0.0.0.0 255.255.255.255 area 0
2.测试
Spicey#sh ip os nei
Neighbor ID Pri State Dead Time Address Interface
20.1.1.2 0 FULL/ - 00:00:37 20.1.1.2 Serial0/0.2
10.1.1.2 0 FULL/ - 00:00:32 10.1.1.2 Serial0/0.1
Aton#sh ip route ospf
10.0.0.0/24 is subnetted, 1 subnets
O 10.1.1.0 [110/128] via 20.1.1.1, 00:01:35, Serial0/0
Aton#p 10.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 480/540/688 ms
五、Cisco自有的Broadcast网络环境
1.配置命令
Spicey
interface Serial0/0
ip address 10.1.1.1 255.255.255.0
encapsulation frame-relay
ip ospf network broadcast
ip ospf priority 255
no arp frame-relay
frame-relay map ip 10.1.1.2 102 broadcast
frame-relay map ip 10.1.1.3 103 broadcast
no frame-relay inverse-arp
router ospf 11
network 0.0.0.0 255.255.255.255 area 0
Praslt
interface Serial0/0
ip address 10.1.1.2 255.255.255.0
encapsulation frame-relay
ip ospf network broadcast
no arp frame-relay
frame-relay map ip 10.1.1.1 201 broadcast
no frame-relay inverse-arp
router ospf 11
network 0.0.0.0 255.255.255.255 area 0
Aton
interface Serial0/0
ip address 10.1.1.3 255.255.255.0
encapsulation frame-relay
ip ospf network broadcast
no arp frame-relay
frame-relay map ip 10.1.1.1 301 broadcast
no frame-relay inverse-arp
router ospf 11
network 0.0.0.0 255.255.255.255 area 0
2.测试
Spicey#sh ip route ospf
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/65] via 10.1.1.3, 00:05:49, Serial0/0
Spicey#sh ip os nei
Neighbor ID Pri State Dead Time Address Interface
10.1.1.2 1 FULL/BDR 00:00:34 10.1.1.2 Serial0/0
20.1.1.2 1 EXSTART/DROTHER 00:00:35 10.1.1.3 Serial0/0
Spicey#p 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
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