路由汇总和过滤

1、BGP8-BGP 路由汇总和路由过滤实验目的：了解 BGP 路由汇总的方法，掌握其配置；并且尽可能多的掌握 BGP 中路由过滤的方法。说明：本实验中仅第一部分为 CCNP 课程中应掌握内容，第二、三、四部分均为超纲内容，供有志于冲击 CCIE 的学员选做。第一部分拓扑图：/3010.168.192.实验步骤：1， 按图示配置好各台路由器的各个接口；2， 配置路由协议，注意 London 和 Florence 间并不运行 IBGP，运行的是 EIGRP：2005 steve6307.s.CCNP+BGP 路由汇总BasicAS 52S 0.23.3.3.3.1 6/30 Denver 0/2AS

2、 51192.168.192.0/24 1.1.1.1 10.1.1.5192.168.193.0/24S 0.2192.168.194.0/24 LondonS 0.110.1.1.1/30192.110.1.1.2/30S 0.1192.168.196.0/24 2.2.2.2192.168.197.0/24192.168.198.0/24 FlorenceEIGRP 513， 查看 Denver 的路由表，发现能够学到具体路由：Denver#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile,

3、 B BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-ISer area* - candidate default, U - per-user sic rou

4、te, o - ODR P - periodic downloaded sic routeGateway of last resort is not setB192.168.192.0/24 20/0 via 10.1.1.5, 00:01:53B192.168.193.0/24 20/0 via 10.1.1.5, 00:01:53B192.168.194.0/24 20/0 via 10.1.1.5, 00:01:5310.0.0.0/30 ibnetted, 2 subnetsB10.1.1.0 20/0 via 10.1.1.5, 00:01:53C10.1.1.4 is direct

5、ly connected, Serial0.2Denver(config)#router bgp 52Denver(config-router)#bgp router-id 3.3.3.3Denver(config-router)#neighbor 10.1.1.5 remote-as 51Denver(config-router)#network 10.1.1.4 mask 255.255.255.252Florence(config)#router eigrp 51Florence(config-router)#eigrp router-id 2.2.2.2Florence(config-

6、router)#network 0.0.0.0 255.255.255.255London(config)#router bgp 51London(config-router)#bgp router-id 1.1.1.1London(config-router)#neighbor 10.1.1.6 remote-as 52London(config-router)#network 192.168.192.0London(config-router)#network 192.168.193.0London(config-router)#network 192.168.194.0London(co

7、nfig-router)#network 10.1.1.0 mask 255.255.255.252London(config-router)#network 10.1.1.4 mask 255.255.255.252 London(config-router)#exitLondon(config)#router eigrp 51London(config-router)#eigrp router-id 1.1.1.1London(config-router)#network 0.0.0.0 255.255.255.2554， 在 London 上配置路由汇总，有两种方法，先尝试一下第一种吧（

8、注意不要漏了静态路由，这种方法没有它可）：5， 再次查看一下 Denver 的路由表，原先的具体路由已经变为汇总条目了吧？6， 回到 London，改用另法再试试：7， 再看看 Denver 的路由表，一样的效果：London(config)#no ip route 192.168.192.0 255.255.248.0London(config)#router bgp 51London(config-router)#no network 192.168.192.0 mask 255.255.248.0London(config-router)#network 192.168.192.0Lon

9、don(config-router)#network 192.168.193.0London(config-router)#network 192.168.194.0London(config-router)#redistribute eigrp 51London(config-router)#$ddress 192.168.192.0 255.255.248.0 summary-onlyDenver#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX -

10、 EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-ISer area* - candidate defau t, U - per-user sic route, o - ODR P - perio

11、dic downloaded sic routeGateway of last resort is not set 10.0.0.0/30 ibnetted, 2 subnetsB10.1.1.0 20/0 via 10.1.1.5, 00:07:56C10.1.1.4 is directly connected, Serial0.2B192.168.192.0/21 20/0 via 10.1.1.5, 00:01:13London(config)#ip route 192.168.192.0 255.255.248.0 null 0London(config)#router bgp 51L

12、ondon(config-router)#no network 192.168.192.0London(config-router)#no network 192.168.193.0London(config-router)#no network 192.168.194.0London(config-router)#network 192.168.192.0 mask 255.255.248.0第二部分拓扑图：AS 52/303.3.3.3 10.1.1.17/30S 0.2S 0.310.1.1.6/3010.1.Denver S 0.1只有汇总路由10 1.1.13/30路由汇总路由10.

13、1.1.14/30S 0.110.1.1.21/3010/30S 0.34.4.4.4NewYorkS 0.210.1.1.9/30实验步骤：1， 在上个实验的基础上，按图示再添加两台路由器，配置好它们的接口（注意在 Florence2005 steve6307.s.CCNP+汇总路由和更具体的地址AS 53S 0.15.5.5.51.18/30 IstanbulS 0.2 10.1.1.22/30AS 51192.168.192.0/24 1.1.1.1 10.1.1.5192.168.193.0/24S 0.2192.168.194.0/24 LondonS 0.1 10.1.1.1/30

14、全部10.1.1.2/30S 0.1192.168.196.0/24 2.2.2.2 10.1.1.192.168.197.0/24S 0.2192.168.198.0/24 FlorenceEIGRP 51Denver#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA e

15、xternal type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-ISer area* - candidate default, U - per-user sic route, o - ODR P - periodic downloaded sic routeGateway of last resort is not set10.0.0.0/8 is variably subnetted, 3

16、 subnets, 2 masks B10.0.0.0/8 20/2169856 via 10.1.1.5, 00:01:55B10 1.1.0/30 20/0 via 10.1.1.5, 00:24:42C10.1.1.4/30 is directly connected, Serial0.2 B192.168.192.0/21 20/0 via 10.1.1.5, 00:01:25和 Denver 上也要添加子接口了）；2，配置路由协议，包括对原有三台路由器上邻居的添加以及 Florence 上的路由汇总：3，现在在 London 和 Florence 上配置的是只通告汇总路由，下一步改成

17、既通告汇总路由也通告具体路由吧：Istanbul(config)#router bgp 53Istanbul(config-router)#bgp router-id 5.5.5.5Istanbul(config-router)#neighbor 10.1.1.17 remote-as 52Istanbul(config-router)#neighbor 10.1.1.21 remote-as 52Istanbul(config-router)#network 10.1.1.16 mask 255.255.255.252Istanbul(config-router)#network 10.1.

18、1.20 mask 255.255.255.252NewYork(config)#router bgp 52NewYork(config-router)#bgp router-id 4.4.4.4NewYork(config-router)#neighbor 10.1.1.10 remote-as 51NewYork(config-router)#neighbor 10.1.1.13 remote-as 52NewYork(config-router)#neighbor 10.1.1.22 remote-as 53NewYork(config-router)#network 10.1.1.8

19、mask 255.255.255.252NewYork(config-router)#network 10.1.1.12 mask 255.255.255.252NewYork(config-router)#network 10.1.1.20 mask 255.255.255.252 NewYork(config-router)#no synchronizationDenver(config)#router bgp 52Denver(config-router)#neighbor 10.1.1.14 remote-as 52Denver(config-router)#neighbor 10.1

20、.1.18 remote-as 53Denver(config-router)#network 10.1.1.12 mask 255.255.255.252Denver(config-router)#network 10.1.1.16 mask 255.255.255.252 Denver(config-router)#no synchronizationFlorence(config)#router bgp 51Florence(config-router)#bgp router-id 2.2.2.2Florence(config-router)#neighbor 10.1.1.9 remo

21、te-as 52Florence(config-router)#network 192.168.196.0Florence(config-router)#network 192.168.197.0Florence(config-router)#network 192.168.198.0Florence(config-router)#network 10.1.1.0 mask 255.255.255.0Florence(config-router)#network 10.1.1.8 mask 255.255.255.0Florence(config-router)#redistribute ei

22、grp 51Florence(config-router)#$ddress 192.168.192.0 255.255.248.0 summary-only4， 看看 Denver、NewYork 和 Istanbul 的路由表，现在它们是既可以学到汇总路由也能学到具体条目：Denver#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA

23、 external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-ISer area* - candidate default, U - per-user sic route, o - ODR P - periodic downloaded sic routeGateway of last resort is not setB

24、192.168.192.0/24 20/0 via 10.1.1.5, 00:02:09B192.168.193.0/24 20/0 via 10.1.1.5, 00:02:09B192.168.194.0/24 20/0 via 10.1.1.5, 00:02:09B192.168.196.0/24 200/0 via 10.1.1.10, 00:00:34B192.168.197.0/24 200/0 via 10.1.1.10, 00:00:34B192.168.198.0/24 200/0 via 10.1.1.10, 00:00:3410.0.0.0/8 is variably su

25、bnetted, 7 subnets, 2 masks B10.1.1.8/30 200/0 via 10.1.1.14, 00:07:33C10.1.1.12/30 is directly connected, Serial0.1B10.0.0.0/8 20/2169856 via 10.1.1.5, 00:07:38B10.1.1.0/30 20/0 via 10.1.1.5, 00:07:38C 10.1.1.4/30 is directly connected, Serial0.2 C10.1.1.16/30 is directly connected, Serial0.3 B10.1

26、.1.20/30 200/0 via 10.1.1.14, 00:07:36B192.168.192.0/21 20/0 via 10.1.1.5, 00:01:24Florence(config)#router bgp 51Florence(config-router)#no aggregate-address 192.168.192.0 255.255.248.0Florence(config-router)#aggregate-address 192.168.192.0 255.255.248.0London(config)#router bgp 51London(config-rout

27、er)#no aggregate-address 192.168.192.0 255.255.248.0London(config-router)#aggregate-address 192.168.192.0 255.255.248.0NewYork#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA external type 1,

28、N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, su - IS-Immary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-ISer area, * - candidate default, U - per-user sic route o - ODR, P - periodic downloaded sic routeGateway of last resort is not setB1

29、92.168.192.0/24 200/0 via 10.1.1.5, 00:04:12B192.168.193.0/24 200/0 via 10.1.1.5, 00:04:12B192.168.194.0/24 200/0 via 10.1.1.5, 00:04:12B192.168.196.0/24 20/0 via 10.1.1.10, 00:02:46B192.168.197.0/24 20/0 via 10.1.1.10, 00:02:46B192.168.198.0/24 20/0 via 10.1.1.10, 00:02:4610.0.0.0/8 is variably sub

30、netted, 7 subnets, 2 masks C10.1.1.8/30 is directly connected, Serial0.2C10.1.1.12/30 is directly connected, Serial0.1 B10.1.1.0/30 200/0 via 10.1.1.5, 00:09:40B10.0.0.0/8 20/2169856 via 10.1.1.10, 00:09:42B10.1.1.4/30 200/0 via 10.1.1.13, 00:09:43B10.1.1.16/30 200/0 via 10.1.1.13, 00:09:43C10.1.1.2

31、0/30 is directly connected, Serial0.3 B192.168.192.0/21 20/0 via 10.1.1.10, 00:02:225， 下一步希望按照图上的要求，让 Denver 和 NewYork 仍然学到汇总路由和具体路由，但让 Istanbul 只学到汇总路由，实现这一目的当然有多种方法，本实验中用团体属性来实现：London(config)#$ 100 permit ip host 192.168.192.0 host 255.255.248.0 London(config)#route-map com permit 10London(config

32、-route-map)#match ip address 100 London(config-route-map)#set community none London(config-route-map)#exit London(config)#route-map com permit 20 London(config-route-map)#set community no-export London(config-route-map)#exit London(config)#router bgp 51London(config-router)#neighbor 10.1.1.6munity L

33、ondon(config-router)#neighbor 10.1.1.6 route-map com outIstanbul#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 -

34、 OSPF external type 2, E - EGPi - IS-IS, su - IS-Immary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-ISer area, * - candidate default, U - per-user sic route o - ODR, P - periodic downloaded sic routeGateway of last resort is not setB192.168.192.0/24 20/0 via 10.1.1.21, 00:05:05B192.168.193.0/24

35、20/0 via 10.1.1.21, 00:05:05B192.168.194.0/24 20/0 via 10.1.1.21, 00:05:05B192.168.196.0/24 20/0 via 10.1.1.17, 00:04:42B192.168.197.0/24 20/0 via 10.1.1.17, 00:04:42B192.168.198.0/24 20/0 via 10.1.1.17, 00:04:4210.0.0.0/8 is variably subnetted, 7 subnets, 2 masks B10.1.1.8/30 20/0 via 10.1.1.21, 00

36、:10:34B10.1.1.12/30 20/0 via 10.1.1.17, 00:10:37B10.1.1.0/30 20/0 via 10.1.1.17, 00:10:08B10.0.0.0/8 20/0 via 10.1.1.21, 00:10:34B10.1.1.4/30 20/0 via 10.1.1.17, 00:10:37C10.1.1.16/30 is directly connected, Serial0.1 C10.1.1.20/30 is directly connected, Serial0.2 B 192.168.192.0/21 20/0 via 10.1.1.1

37、7, 00:03:416， 再次查看一下 Denver、NewYork 和 Istanbul 的路由表，发现目的已达到，Denver 和NewYork 都是既能学到汇总路由又能学到具体路由，而 Istanbul 则只能学到汇总路由：NewYork(config)#router bgp 52NewYork(config-router)#neighbor 10.1.1.13munityDenver(config)#router bgp 52Denver(config-router)#neighbor 10.1.1.14munityFlorence(config)#$ 100 permit ip h

38、ost 192.168.192.0 host 255.255.248.0 Florence(config)#route-map com permit 10Florence(config-route-map)#match ip address 100 Florence(config-route-map)#set community none Florence(config-route-map)#exit Florence(config)#route-map com permit 20 Florence(config-route-map)#set community no-export Flore

39、nce(config-route-map)#exit Florence(config)#router bgp 51Florence(config-router)#neighbor 10.1.1.9munity Florence(config-router)#neighbor 10.1.1.9 route-map com outDenver#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA -

40、OSPFer area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-ISer area* - candidate default, U - per-user sic route, o - ODR P - periodic downloaded sic routeGateway

41、of last resort is not setB192.168.192.0/24 20/0 via 10.1.1.5, 00:01:49B192.168.193.0/24 20/0 via 10.1.1.5, 00:01:49B192.168.194.0/24 20/0 via 10.1.1.5, 00:01:49B192.168.196.0/24 200/0 via 10.1.1.10, 00:01:32B192.168.197.0/24 200/0 via 10.1.1.10, 00:01:32B192.168.198.0/24 200/0 via 10.1.1.10, 00:01:3

42、210.0.0.0/8 is variably subnetted, 7 subnets, 2 masks B10.1.1.8/30 200/0 via 10.1.1.14, 00:01:31C10.1.1.12/30 is directly connected, Serial0.1 B 10.1.1.0/30 20/0 via 10.1.1.5, 00:01:50B10.0.0.0/8 20/2169856 via 10.1.1.5, 00:01:50C 10.1.1.4/30 is directly connected, Serial0.2 C10.1.1.16/30 is directl

43、y connected, Serial0.3 B10.1.1.20/30 200/0 via 10.1.1.14, 00:01:33B192.168.192.0/21 20/0 via 10.1.1.5, 00:01:51NewYork#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA external type 1, N2 - OSP

44、F NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, su - IS-Immary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-ISer area, * - candidate default, U - per-user sic route o - ODR, P - periodic downloaded sic routeGateway of last resort is not setB192.168.1

45、92.0/24 200/0 via 10.1.1.5, 00:03:18B192.168.193.0/24 200/0 via 10.1.1.5, 00:03:18B192.168.194.0/24 200/0 via 10.1.1.5, 00:03:18B192.168.196.0/24 20/0 via 10.1.1.10, 00:03:38B192.168.197.0/24 20/0 via 10.1.1.10, 00:03:38B192.168.198.0/24 20/0 via 10.1.1.10, 00:03:3810.0.0.0/8 is variably subnetted,

46、7 subnets, 2 masks C10.1.1.8/30 is directly connected, Serial0.2C10.1.1.12/30 is directly connected, Serial0.1 B10.1.1.0/30 200/0 via 10.1.1.5, 00:03:19B10.0.0.0/8 20/2169856 via 10.1.1.10, 00:03:39B10.1.1.4/30 200/0 via 10.1.1.13, 00:03:34B10.1.1.16/30 200/0 via 10.1.1.13, 00:03:34C10.1.1.20/30 is

47、directly connected, Serial0.3 B192.168.192.0/21 20/0 via 10.1.1.10, 00:03:40第三部分拓扑图：AS 51AS 52192.168.192.0/24192.168.193.0/24192.168.194.0/24汇总路由1.1.1.1 10.1.1.5/303.3.3.3 10.1.1.17/30192.168.192.0/24192.168.193.0/24192.168.194.0/24S 0.2S 0.2S 0.310.1.1.6/3010.1.1London S 0.1Denver S 0.110.1.1.1/30

48、10.1.1.13/3010.1.1.2/30S 0.1 192.168.196.0/2410.1.1.14/30S 0.110.1.1.21/3010.1.1.10/30S 0.32.2.2.24.4.4.4NewYorkS 0.2192.168.197.0/24192.168.198.0/24S 0.2Florence10.1.1 9/30192.168.196.0/24192.168.197.0/24192.168.198.0/24EIGRP 51汇总路由实验步骤：2005 steve6307.s.CCNP+Suppress-mapAS 53S 0.15.5.5.5.18/30 Ista

49、nbulS 0.2 10.1.1.22/30Istanbul#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi -

50、IS-IS, su - IS-Immary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-ISer area, * - candidate default, U - per-user sic route o - ODR, P - periodic downloaded sic routeGateway of last resort is not set 10.0.0.0/30 ibnetted, 5 subnetsB10.1.1.8 20/0 via 10.1.1.21, 00:04:23B10.1.1.12 20/0 via 10.1.1.2

51、1, 00:04:23B10.1.1.4 20/0 via 10.1.1.17, 00:04:11C10.1.1.16 is directly connected, Serial0.1 C10.1.1.20 is directly connected, Serial0.2B192.168.192.0/21 20/0 via 10.1.1.17, 00:04:231，先把上一部分中步骤 5 的配置全部去掉，还原成所有路由器都既学到汇总路由也学到具体路由的状况；2， 按图示的要求，London 向 Denver 通告汇总路由和 192.168.192.0/24、192.168.193.0/24、1

52、92.168.194.0/24 三条具体路由 ，而 Florence 向 NewYork 通告 汇总路由 和192.168.196.0/24、192.168.197.0/24、192.168.198.0/24 三条具体路由，和 Florence 上配置 suppress-map 来实现这个目的：通过在 London3， 分别查看 Denver 和 NewYork 的路由表， 发现它们到达 192.168.192.0/24 、192.168.193.0/24、192.168.194.0/24 三个目标网络都是采用 London（10.1.1.5）作为下一跳，而到达 192.168.196.0/2

53、4、192.168.197.0/24、192.168.198.0/24 三个目标网络则都是采用 Florence（10.1.1.10）作为下一跳，这就是衡和冗余备份：本实验配置的目的实现负载均Florence(config)#ip prefix-list abc seq 5 permit 192.168.192.0/22 le 24 Florence(config)#route-map sup permit 10Florence(config-route-map)#match ip address prefix-list abc Florence(config-route-map)#exitF

54、lorence(config)#router bgp 51Florence(config-router)#$ddress 192.168.192.0 255.255.248.0 suppress-map supLondon(config)#acs-list 1 permit 192.168.196.0 0.0.3.255 London(config)#route-map sup permit 10London(config-route-map)#match ip address 1 London(config-route-map)#exit London(config)#router bgp

55、51London(config-router)#$ddress 192.168.192.0 255.255.248.0 suppress-map supDenver#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF ext

56、ernal type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-ISer area* - candidate default, U - per-user sic route, o - ODR P - periodic downloaded sic routeGateway of last resort is not setB192.168.192.0/24 20/0 via 10.1.1.5, 00:01:02B192.168.193.0/24

57、20/0 via 10.1.1.5, 00:01:02B192.168.194.0/24 20/0 via 10.1.1.5, 00:01:02B192.168.196.0/24 200/0 via 10.1.1.10, 00:01:02B192.168.197.0/24 200/0 via 10.1.1.10, 00:01:02B192.168.198.0/24 200/0 via 10.1.1.10, 00:01:0210.0.0.0/8 is variably subnetted, 7 subnets, 2 masks B10.1.1.8/30 200/0 via 10.1.1.14,

58、00:19:03C10.1.1.12/30 is directly connected, Serial0.1B10.0.0.0/8 20/2169856 via 10.1.1.5, 00:01:03B10.1.1.0/30 20/0 via 10.1.1.5, 00:01:04C 10.1.1.4/30 is directly connected, Serial0.2 C10.1.1.16/30 is directly connected, Serial0.3 B10.1.1.20/30 200/0 via 10.1.1.14, 00:19:05B192.168.192.0/21 20/0 v

59、ia 10.1.1.5, 00:01:04第四部分拓扑图：NewYork#show ip routeCodes: C - connected, S - sic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPFer area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - E

60、GPi - IS-IS, su - IS-Immary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-ISer area, * - candidate default, U - per-user sic route o - ODR, P - periodic downloaded sic routeGateway of last resort is not setB192.168.192.0/24 200/0 via 10.1.1.5, 00:01:12B192.168.193.0/24 200/0 via 10.1.1.5, 00:01:12