1、在 NBMA 網(wǎng)絡(luò)非廣播式模型上配置 OSPF1、概述當(dāng)在 NBMA 網(wǎng)絡(luò)中配置 OSPF，必須注意哪個(gè)路由器是網(wǎng)絡(luò)的 DR 和 BDR，DR 和BDR 要求與網(wǎng)絡(luò)中的所有路由器都有完全的邏輯連接。同時(shí)，根據(jù)所使用的是四種網(wǎng)絡(luò)類型中的哪一種（廣播式、非廣播式、點(diǎn)到點(diǎn)、點(diǎn)到多點(diǎn)），有必要使用額外的配置。這個(gè)實(shí)驗(yàn)是在非廣播的 NBMA 幀中繼網(wǎng)絡(luò)中使用了 OSPF。這種類型是幀中繼網(wǎng)絡(luò)中的物理接口的缺省類型。在非廣播式網(wǎng)絡(luò)中，存在一個(gè) DR 或 BDR，這要根據(jù)網(wǎng)絡(luò)的性能，這個(gè) DR 和 BDR 必須有一個(gè)包含所有處于幀中繼中的路由器的靜態(tài)表，在這個(gè)OSPF 過(guò)程中使用鄰居命令可以完成這個(gè)任務(wù)。對(duì)

2、于這個(gè)實(shí)驗(yàn)，DR 是 B 路由器。2、配置概述這個(gè)實(shí)驗(yàn)將驗(yàn)證非廣播式幀中繼網(wǎng)絡(luò)上的 OSPF 的配置過(guò)程，路由器 A、B、C 靠一個(gè)轉(zhuǎn)接線串行的接入一個(gè) Cisco 路由器上，這個(gè)路由器作為幀中繼。路由器 A、C 的串行接口所配置的 OSPF 優(yōu)先級(jí)為 0，這個(gè)配置將保證路由器 B 成為DR，每個(gè)路由器的鄰居都會(huì)配置到路由器 B 上。3、具體配置如下： FR#wr tBuilding configuration.Current configuration : 1360 bytes!version 12.4service timestamps debug datetime msec servic

3、e timestamps log datetime msec no service password-encryption!hostname FR!boot-start-marker boot-end-marker!enable secret 5 $1$ZkMk$Gb/wBOe2uDiHQ0QTE/3F./!no aaa new-model memory-size iomem 5!ip cefno ip domain lookup!frame-relay switching!interface FastEthernet0/0 no ip addressshutdown duplex auto

4、speed auto!interface Serial1/0 no ip addressencapsulation frame-relay serial restart-delay 0 frame-relay intf-type dceframe-relay route 102 interface Serial1/1 201frame-relay route 104 interface Serial1/2 401!interface Serial1/1 no ip addressencapsulation frame-relay serial restart-delay 0 frame-rel

5、ay intf-type dceframe-relay route 201 interface Serial1/0 102frame-relay route 301 interface Serial1/2 103!interface Serial1/2 no ip addressencapsulation frame-relay serial restart-delay 0 frame-relay intf-type dceframe-relay route 103 interface Serial1/1 301frame-relay route 401 interface Serial1/0

6、 104!interface Serial1/3 no ip address shutdownserial restart-delay 0!ip http server!control-plane!line con 0exec-timeout 0 0 password wlcb logging synchronousloginline aux 0 no exec line vty 0 4exec-timeout 5 30 password wlcb logging synchronous login!endA#wr tBuilding configuration.Current configu

7、ration : 1264 bytes!version 12.4service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption!hostname A!boot-start-marker boot-end-marker!enable secret 5 $1$U3zY$garnA2B/8/3Lyf1xGtXfc1!no aaa new-model memory-size iomem 5!ip cefno ip domain lookup!interf

8、ace Loopback0ip address !interface FastEthernet0/0 no ip addressshutdown duplex autospeed auto!interface Serial1/0ip address encapsulation frame-relay ip ospf priority 0serial restart-delay 0frame-relay map ip 102 broadcastframe-relay map ip 192.

9、1.1.3 104 broadcast no frame-relay inverse-arp!interface Serial1/1 no ip address shutdownserial restart-delay 0!interface Serial1/2 no ip address shutdownserial restart-delay 0!interface Serial1/3 no ip address shutdownserial restart-delay 0!router ospf 100log-adjacency-changesnetwork 0.0.0.

10、255 area 0network 55 area 0!ip http server control-plane line con 0exec-timeout 0 0 password wlcb logging synchronous loginline aux 0 no exec line vty 0 4exec-timeout 5 30 password wlcb logging synchronouslogin endB#wr tBuilding configuration.Current configuration : 1256 bytes!versi

11、on 12.4service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption!hostname B!boot-start-marker boot-end-marker!enable secret 5 $1$.4/4$RLSwcQpy4Udvg8g.KH28Z0!no aaa new-model memory-size iomem 5!ip cefno ip domain lookup!interface Loopback0ip address 2

12、.2.2.2 !interface FastEthernet0/0 no ip addressshutdown duplex autospeed auto!interface Serial1/0ip address encapsulation frame-relay serial restart-delay 0frame-relay map ip 201 broadcastframe-relay map ip 301 broadcast!interface Serial1/1 no

13、ip address shutdownserial restart-delay 0!interface Serial1/2 no ip address shutdownserial restart-delay 0!interface Serial1/3 no ip address shutdownserial restart-delay 0!router ospf 100log-adjacency-changesnetwork 55 area 0network 55 area 0neighbor neighbor

14、 !ip http server!control-plane line con 0exec-timeout 0 0 password wlcb logging synchronous loginline aux 0 no exec line vty 0 4exec-timeout 5 30 password wlcblogging synchronous loginendC#wr tBuilding configuration.Current configuration : 1236 bytes!version 12.4service timestamps debug dat

15、etime msec service timestamps log datetime msec no service password-encryption!hostname C!boot-start-marker boot-end-marker!enable secret 5 $1$eXsL$G73l6MHlaSPNOpuom1XP8.!no aaa new-model memory-size iomem 5!ip cefno ip domain lookup!interface Loopback0ip address !interface Fast

16、Ethernet0/0 no ip addressshutdown duplex autospeed auto!interface Serial1/0ip address encapsulation frame-relay ip ospf priority 0serial restart-delay 0frame-relay map ip 401 broadcastframe-relay map ip 103 broadcast!interface Serial1/1 no ip address shutdownserial restart-delay 0!interface Serial1/2 no ip address shutdownserial restart-delay 0!interface Serial1/3 no ip address shutdownserial restart-delay 0!router ospf 100log-adjacency-changesnetwork 55 area 0n