紧急求助NP实验ospf stub题

sunforever

明天就考试了，急。
Seattle>enable
Password:cisco
Seattle#conf t
Seattle(config)#router ospf 10
Seattle(config-router)#network 192.168.16.4 0.0.0.3 area 21One of the tasks states that area 21 should not receive any external orinter-area routes (except the default route).
Seattle(config-router)#area 21 stub
Seattle(config-router)#end
Seattle#copy run start
Chicago Configuration:
Chicago>enable
Password: cisco
Chicago#conf t
Chicago(config)#router ospf 10
Chicago(config-router)#network 192.168.16.4 0.0.0.3 area 21
Chicago(config-router)#area 21 stub no-summary
Chicago(config-router)#end
Chicago#copy run start


题目：大意就是要求ospf进程是21，配成stub之类的。
我有一句话不理解，是不是要在第一台路由器ping通最后一台的loopback。
HH010.com is a small IT corporation that is attempting to implement thenetwork shown in the exhibit. Currently the implementation is partiallycompleted. OSPF has been configured on routers Chicago and NewYork. TheSO/O interface on Chicago and the SO/1 interface on NewYork are in Area 0.The loopbackO interface on NewYork is in Area 1. However, they cannot pingfrom the serial interface of the Seattle router to the loopback interface of theNewYork router. You have been asked to complete the implementation to allowthis ping.HH010.com's corporate implementation guidelines require:• The OSPF process ID for all routers must be 10.• The routing protocol for each interface must be enabled under the routingprocess.• The routing protocol must be enabled for each interface using the mostspecific wildcard mask possible.• The serial link between Seattle and Chicago must be in OSPF area 21.• OSPF area 21 must not receive any inter-area or external routes.(except thedefault route)
Network Information
SeattleS0/0 192.168.16.5/30 - Link between Seattle and ChicagoSecret Password: cisco
ChicagoS0/0 192.168.54.9/30 - Link between Chicago and NewYorkS0/1 192.168.16.6/30 - Link between Seattle and Chicago SecrePassword: cisco
NewYorkS0/1 192.168.54.10/30 - Link between Chicago and NewYorkLoopback0 172.16.189.189Secret Password: cisco




图在这

syfccnahao

有几点：1.进程号是10  2.题目问题是不能从最左边ping最右边，你要通过配置使其ping通3.额外要求是area 21不需要收到lsa345，所以要配成stub区域，并在abr上配置stub no-summary

wqlxi888

http://www.digitaltut.com/ 给你一个外国的CCNP题库网站 你去看看人家的讲解吧

syfccnahao

有几点：1.进程号是10  2.题目问题是不能从最左边ping最右边，你要通过配置使其ping通3.额外要求是area 21不需要收到lsa345，所以要配成stub区域，并在abr上配置stub no-summary

sunforever

syfccnahao 发表于 2015-4-22 23:56
有几点：1.进程号是10  2.题目问题是不能从最左边ping最右边，你要通过配置使其ping通3.额外要求是area 21 ...

配置完stub 就ping不通

jayshe886

我也是PING不通环回口，这是为啥

乐罗

sunforever 发表于 2015-4-23 12:59
配置完stub 就ping不通

是用的题库提供的拓扑的话，IP和area配置都和题库不一样，所以不通，把配置理一遍就通了