Objectives:
-、配置EIGRP和OSPF
-、實作EIGRP和OSPF的雙向重配置設定
-、實作EIGRP的路由
-、使用route map實作路由過濾
-、修改EIGRP和OSPF的AD值
-、在EIGRP上建立被動接口
-、在OSPF的ABR和ASBR上配置路由彙總
首先在R1，R2，R3上把基本的配置配好
R1#show ip int bri | b Serial
Serial1/0 172.16.12.1 YES manual up up
Serial1/1 unassigned YES unset administratively down down
Serial1/2 unassigned YES unset administratively down down
Serial1/3 unassigned YES unset administratively down down
Loopback0 172.16.1.1 YES manual up up
Loopback48 192.168.48.1 YES manual up up
Loopback49 192.168.49.1 YES manual up up
Loopback50 192.168.50.1 YES manual up up
Loopback51 192.168.51.1 YES manual up up
Loopback70 192.168.70.1 YES manual up up
R2(config-if)#do show ip int bri | b Serial
Serial1/0 unassigned YES unset administratively down down
Serial1/1 172.16.12.2 YES manual up up
Serial1/3 172.16.23.2 YES manual up up
Loopback0 172.16.2.1 YES manual up up
Loopback100 172.16.100.1 YES manual up up
R3(config-if)#do show ip int bri | b Serial
Serial1/0 172.16.23.3 YES manual up up
Loopback0 172.16.3.1 YES manual up up
Loopback8 192.168.8.1 YES manual up up
Loopback9 192.168.9.1 YES manual up up
Loopback10 192.168.10.1 YES manual up up
Loopback11 192.168.11.1 YES manual up up
Loopback20 192.168.20.1 YES manual up up
Loopback25 192.168.25.1 YES manual up up
Loopback30 192.168.30.1 YES manual up up
Loopback35 192.168.35.1 YES manual up up
Loopback40 192.168.40.1 YES manual up up
完成基本配置後，在R2上驗證一下
R2#ping 172.16.12.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/96/216 ms
R2#ping 172.16.23.3
Sending 5, 100-byte ICMP Echos to 172.16.23.3, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/99/260 ms
OK，進入下一個環節，開始配置EIGRP和OSPF（小激動一下，因為公司一大駝累人的事，一個星期沒做過實驗）。按照拓撲的要求進行路由協定的配置，先在R1和R2上配置EIGRP
R1#show runn | b r e
router eigrp 1
network 0.0.0.0
no auto-summary
!
R2(config-router)#do show runn | b r e
network 172.16.0.0
看一下R1上面EIGRP的network，純屬懶人做法（除實驗平台外請勿使用），再看一下R2的network 172.16.0.0，宜告一個主類網絡，這樣将會把R2上的所有172.16.0.0/16的網絡加入到EIGRP，下面來驗證一下
首先
R2(config-router)#do show ip eigrp nei
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.12.1 Se1/1 11 00:13:15 113 1017 0 3
鄰居關系可以成功建立，
R1#show ip eigrp int 1
IP-EIGRP interfaces for process 1
Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Se1/0 1 0/0 160 0/15 695 0
Lo0 0 0/0 0 0/1 0 0
Lo48 0 0/0 0 0/1 0 0
Lo49 0 0/0 0 0/1 0 0
Lo50 0 0/0 0 0/1 0 0
Lo51 0 0/0 0 0/1 0 0
Lo70 0 0/0 0 0/1 0 0
R1上把所有的接口都加入到EIGRP，看一下R2的
R2(config-router)#do show ip eigrp int 1
Se1/1 1 0/0 113 0/15 467 0
Se1/3 0 0/0 0 0/1 0 0
Lo100 0 0/0 0 0/1 0 0
跟意料中的一樣。但是在R1可以在network後面加上反掩碼，使得通告更加精确，如：
network 172.16.1.0 0.0.0.255
network 172.16.12.0 0.0.0.255
network 192.168.48.0
network 192.168.49.0
network 192.168.50.0
network 192.168.51.0
network 192.168.70.0
還有就是no auto-summary，有事沒事把它帶上，總不會讓你吃虧，作用你們明白的… 接下面驗證一下，R1和R2上的路由是否都正确
R1#show ip route eigrp
172.16.0.0/24 is subnetted, 5 subnets
D 172.16.23.0 [90/2681856] via 172.16.12.2, 00:32:51, Serial1/0
D 172.16.2.0 [90/2297856] via 172.16.12.2, 00:32:51, Serial1/0
D 172.16.100.0 [90/2297856] via 172.16.12.2, 00:32:51, Serial1/0
R2#show ip route eigrp
D 172.16.1.0 [90/2297856] via 172.16.12.1, 00:32:57, Serial1/1
D 192.168.51.0/24 [90/2297856] via 172.16.12.1, 00:32:57, Serial1/1
D 192.168.50.0/24 [90/2297856] via 172.16.12.1, 00:32:57, Serial1/1
D 192.168.49.0/24 [90/2297856] via 172.16.12.1, 00:32:57, Serial1/1
D 192.168.70.0/24 [90/2297856] via 172.16.12.1, 00:32:57, Serial1/1
D 192.168.48.0/24 [90/2297856] via 172.16.12.1, 00:32:57, Serial1/1
R2#
R1通過EIGRP從R2那學習到3條路由，正确。R2通過EIGRP從R1學習到6條路由，其中掩碼，下一跳，出接口都沒有問題，正确。
但是從上面的
R1#
R2#show ip eigrp int 1
EIGRP會在R1和R2的環回口和R2的S1/3接口發送EIGRP的HELLO包，這是沒有必要的，是以優化一下下，看一下配置
R1(config-router)#do show runn | b r e
passive-interface default
no passive-interface Serial1/0
no passive-interface Serial1/1
在R1上把直接R2的序列槽以外的接口配置為被動接口，在R2上把直連R1的序列槽以外的接口配置為被動接口，驗證一下
R1(config-router)#do show ip pro
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
0.0.0.0
Passive Interface(s):
Ethernet0/0
Ethernet0/1
Ethernet0/2
Ethernet0/3
Serial1/1
Serial1/2
Serial1/3
Loopback0
Loopback48
Loopback49
Loopback50
Loopback51
Loopback70
VoIP-Null0
Routing Information Sources:
Gateway Distance Last Update
172.16.12.2 90 00:02:13
Distance: internal 90 external 170
Se1/0 1 0/0 174 0/15 727 0
當然在R2上把連接配接到R3的序列槽配置成為被動接口還會起到一定的安全作用。檢視一下R2的路由表
R2#show ip route
Gateway of last resort is not set
C 172.16.23.0 is directly connected, Serial1/3
C 172.16.12.0 is directly connected, Serial1/1
D 172.16.1.0 [90/2297856] via 172.16.12.1, 00:09:45, Serial1/1
C 172.16.2.0 is directly connected, Loopback0
C 172.16.100.0 is directly connected, Loopback100
D 192.168.51.0/24 [90/2297856] via 172.16.12.1, 00:09:45, Serial1/1
D 192.168.50.0/24 [90/2297856] via 172.16.12.1, 00:09:45, Serial1/1
D 192.168.49.0/24 [90/2297856] via 172.16.12.1, 00:09:45, Serial1/1
D 192.168.70.0/24 [90/2297856] via 172.16.12.1, 00:09:45, Serial1/1
D 192.168.48.0/24 [90/2297856] via 172.16.12.1, 00:09:45, Serial1/1
可以将172.16.48.0/24-172.16.51.0/24彙總成172.16.48.0/23，也就是在可以在R1配置EIGRP的路由彙總。EIGRP的路由彙總是配置在接口下面的，不像RIP和OSPF，還有RIP也不可以進行超網的路由彙總（請看上一篇RIP和OSPF的重配置設定）。
R1(config-if)#do show runn int s1/0
Building configuration...
Current configuration : 146 bytes
interface Serial1/0
ip address 172.16.12.1 255.255.255.0
ip summary-address eigrp 1 192.168.48.0 255.255.252.0 5
serial restart-delay 0
end
這将在R1的路由表中産生一條指向空接口的彙總路由，還有在R2上将學習到這條彙總路由，驗證一下
R1#show ip rou
D 172.16.23.0 [90/2681856] via 172.16.12.2, 00:01:14, Serial1/0
D 172.16.2.0 [90/2297856] via 172.16.12.2, 00:01:14, Serial1/0
D 172.16.100.0 [90/2297856] via 172.16.12.2, 00:01:14, Serial1/0
D 192.168.48.0/22 is a summary, 00:00:18, Null0
D 172.16.1.0 [90/2297856] via 172.16.12.1, 00:01:44, Serial1/1
D 192.168.70.0/24 [90/2297856] via 172.16.12.1, 00:01:44, Serial1/1
D 192.168.48.0/22 [90/2297856] via 172.16.12.1, 00:00:48, Serial1/1
正确，但要注意看掩碼後面的5，它是管理距離，也就是EIGRP的彙總路由的預設管理距離是5，但是它隻是在本地有效，檢視一下
R1#show ip route 192.168.48.0 255.255.252.0
Routing entry for 192.168.48.0/22, supernet
Known via "eigrp 1", distance 5, metric 128256, type internal
Redistributing via eigrp 1
Routing Descriptor Blocks:
* directly connected, via Null0
Route metric is 128256, traffic share count is 1
Total delay is 5000 microseconds, minimum bandwidth is 10000000 Kbit
Reliability 255/255, minimum MTU 1514 bytes
Loading 1/255, Hops 0
R2#show ip route 192.168.48.0 255.255.252.0
Known via "eigrp 1", distance 90, metric 2297856, type internal
Last update from 172.16.12.1 on Serial1/1, 00:04:19 ago
* 172.16.12.1, from 172.16.12.1, 00:04:19 ago, via Serial1/1
Route metric is 2297856, traffic share count is 1
Total delay is 25000 microseconds, minimum bandwidth is 1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1
EIGRP配置完成後，在R2和R3上配置OSPF。R2和R3之間的串行鍊路在區域0，R2的Loopback100在區域10，R3的Lo~Lo11在區域20。
R2#show runn | b r o
router ospf 1
router-id 1.1.1.2
log-adjacency-changes
network 172.16.23.0 0.0.0.255 area 0
network 172.16.100.0 0.0.0.255 area 10
R3#show runn | b r o
router-id 1.1.1.3
network 172.16.3.0 0.0.0.255 area 0
network 192.168.8.0 0.0.0.255 area 20
network 192.168.9.0 0.0.0.255 area 20
network 192.168.10.0 0.0.0.255 area 20
network 192.168.11.0 0.0.0.255 area 20
network 192.168.20.0 0.0.0.255 area 0
network 192.168.25.0 0.0.0.255 area 0
network 192.168.30.0 0.0.0.255 area 0
network 192.168.35.0 0.0.0.255 area 0
network 192.168.40.0 0.0.0.255 area 0
配置完成後，應該是R2和R3完成鄰接關系，由于是點到點的網絡類型，是以沒有DR和BDR的選舉。R2可以學習到R3的環回位址路由和區域20的O IA路由，還有就是R3可以學習到區域10的O IA路由，下面驗證一下
R2#show ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
1.1.1.3 0 FULL/ - 00:00:31 172.16.23.3 Serial1/3
R3#show ip ospf nei
1.1.1.2 0 FULL/ - 00:00:30 172.16.23.2 Serial1/0
下面是路由表
R2#show ip route ospf
192.168.30.0/32 is subnetted, 1 subnets
O 192.168.30.1 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
192.168.8.0/32 is subnetted, 1 subnets
O IA 192.168.8.1 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
192.168.25.0/32 is subnetted, 1 subnets
O 192.168.25.1 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
192.168.9.0/32 is subnetted, 1 subnets
O IA 192.168.9.1 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
192.168.10.0/32 is subnetted, 1 subnets
O IA 192.168.10.1 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
192.168.40.0/32 is subnetted, 1 subnets
O 192.168.40.1 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
172.16.0.0/16 is variably subnetted, 6 subnets, 2 masks
O 172.16.3.1/32 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
192.168.11.0/32 is subnetted, 1 subnets
O IA 192.168.11.1 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
192.168.20.0/32 is subnetted, 1 subnets
O 192.168.20.1 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
192.168.35.0/32 is subnetted, 1 subnets
O 192.168.35.1 [110/65] via 172.16.23.3, 00:04:12, Serial1/3
R3#show ip route ospf
172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
O IA 172.16.100.1/32 [110/65] via 172.16.23.2, 00:04:31, Serial1/0
鄰接關系可以形成，路由也可以學習到，再看清楚一點
/32的主機路由，為什麼呢？
R3#show ip ospf int lo 0
Loopback0 is up, line protocol is up
Internet Address 172.16.3.1/24, Area 0
Process ID 1, Router ID 1.1.1.3, Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
OSPF把環回接口當作一個末梢的主機，把它改為/24的可以，
R2#show runn int lo 100
Current configuration : 100 bytes
interface Loopback100
ip address 172.16.100.1 255.255.255.0
ip ospf network point-to-point
172.16.0.0/24 is subnetted, 3 subnets
O IA 172.16.100.0 [110/65] via 172.16.23.2, 00:00:31, Serial1/0
這下正确了。但是在show runn | b r o的時候有沒有注意到log-adjacency-changes，想知道它的作用吧，在OSPF程序下面打個問号問一下
R2(config)#router ospf 1
R2(config-router)#?
Router configuration commands:
log-adjacency-changes Log changes in adjacency state
也就是在鄰接關系發生改變的時候會有日志提示，當然這是預設的配置，如果把它關掉你可能把OSPF配好了，就會在傻等它loading to full，可是路由器一直沒有提示…
R2(config-router)#no log-adjacency-changes
R2(config-router)#do clear ip ospf pro
Reset ALL OSPF processes? [no]: y
R2(config-router)#do show ip ospf nei
1.1.1.3 0 FULL/ - 00:00:34 172.16.23.3 Serial1/3
嘿嘿，看到了吧。
觀察一下R2的路由表
O 192.168.30.1 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
O IA 192.168.8.1 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
O 192.168.25.1 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
O IA 192.168.9.1 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
O IA 192.168.10.1 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
O 192.168.40.1 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
172.16.0.0/24 is subnetted, 6 subnets
O 172.16.3.0 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
O IA 192.168.11.1 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
O 192.168.20.1 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
O 192.168.35.1 [110/65] via 172.16.23.3, 01:24:34, Serial1/3
OSPF的路由彙總可以發生在ABR和ASBR上，當然可以把區域20的路由在R3上彙總，下面試一下
R3(config-router)#do show runn | b r o
area 20 range 192.168.8.0 255.255.252.0
… …
想像一下配置完成後的結果：在R3上會産生一條指向空接口的彙總路由，之後在R2上會看到一條192.168.8.0/22的O IA路由。其3類LSA的傳遞過程應該是，R3向R2發送192.168.8.0/24~192.168.11.0/24的3類LSA，但是其中的age字段為3600S，這樣R2在收到這些LSA的時候會讓它老化掉，接着R3再向R2發送彙總後的3類LSA。當然在R2上的明細路由會由于3類LSA的老化而删除。下面在R3和R2上驗證一下
R3(config-router)#do show ip route ospf
O IA 172.16.100.0 [110/65] via 172.16.23.2, 00:10:01, Serial1/0
O 192.168.8.0/22 is a summary, 00:10:01, Null0
R2#show ip ospf data
OSPF Router with ID (1.1.1.2) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.2 1.1.1.2 2003 0x80000004 0x00885E 2
1.1.1.3 1.1.1.3 46 0x80000005 0x0031E1 8
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
172.16.100.0 1.1.1.2 2003 0x80000003 0x00957E
192.168.8.0 1.1.1.3 655 0x80000001 0x005077
O 192.168.30.1 [110/65] via 172.16.23.3, 01:41:31, Serial1/3
O 192.168.25.1 [110/65] via 172.16.23.3, 01:41:31, Serial1/3
O 192.168.40.1 [110/65] via 172.16.23.3, 01:41:31, Serial1/3
O 172.16.3.0 [110/65] via 172.16.23.3, 01:41:31, Serial1/3
O 192.168.20.1 [110/65] via 172.16.23.3, 01:41:31, Serial1/3
O 192.168.35.1 [110/65] via 172.16.23.3, 01:41:31, Serial1/3
O IA 192.168.8.0/22 [110/65] via 172.16.23.3, 00:11:35, Serial1/3
在此可以對比一下EIGRP和OSPF的彙總。比如EIGRP和OSPF路由彙總是配置在哪，為什麼要在這些位置配置。
為了實作整個網絡的互聯，可以在R2上配置路由重配置設定
R2#show runn | b r e
redistribute ospf 1 metric 10000 100 255 1 1500
no log-adjacency-changes
redistribute eigrp 1 subnets
在EIGRP程序下重分布時，需要指定路徑成本，如果沒有指定路徑成本，那麼預設路徑成本将會是無窮大，除非你使用default-metric。在OSPF程序下重分布EIGRP和RIP時要注意加上subnets，如果沒有加上它隻能重分布主類網絡，當然OSPF的預設重分布的路徑成本為20，類型為O E2，在R1和R3上驗證一下
D EX 192.168.30.1 [170/2195456] via 172.16.12.2, 00:06:07, Serial1/0
D EX 192.168.25.1 [170/2195456] via 172.16.12.2, 00:06:07, Serial1/0
D EX 192.168.40.1 [170/2195456] via 172.16.12.2, 00:06:07, Serial1/0
D 172.16.23.0 [90/2681856] via 172.16.12.2, 02:09:20, Serial1/0
D 172.16.2.0 [90/2297856] via 172.16.12.2, 02:09:20, Serial1/0
D EX 172.16.3.0 [170/2195456] via 172.16.12.2, 00:06:07, Serial1/0
D 172.16.100.0 [90/2297856] via 172.16.12.2, 02:09:20, Serial1/0
D EX 192.168.20.1 [170/2195456] via 172.16.12.2, 00:06:07, Serial1/0
D EX 192.168.35.1 [170/2195456] via 172.16.12.2, 00:06:07, Serial1/0
D EX 192.168.8.0/22 [170/2195456] via 172.16.12.2, 00:06:07, Serial1/0
D 192.168.48.0/22 is a summary, 02:09:21, Null0
O E2 172.16.12.0 [110/20] via 172.16.23.2, 00:06:15, Serial1/0
O E2 172.16.1.0 [110/20] via 172.16.23.2, 00:06:15, Serial1/0
O E2 172.16.2.0 [110/20] via 172.16.23.2, 00:06:15, Serial1/0
O IA 172.16.100.0 [110/65] via 172.16.23.2, 00:06:15, Serial1/0
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 00:06:15, Serial1/0
O 192.168.8.0/22 is a summary, 00:39:39, Null0
O E2 192.168.48.0/22 [110/20] via 172.16.23.2, 00:06:15, Serial1/0
結果正确。但是現在有一個新的需要，不讓R3上的192.168.25.0/24和192.168.30.0/24的路由重分布到R1上。呵呵，可以使用route-map實作
先在R2上定義好通路控制清單
R2(config)#do show runn | b ip access
ip access-list standard o2e
permit 192.168.25.0 0.0.0.255
permit 192.168.30.0 0.0.0.255
然後配置route-map
R2(config)#do show runn | b route-map
route-map deny_o deny 10
match ip address o2e
route-map deny_o permit 20
之後應用在EIGRP重分布下面
redistribute ospf 1 metric 10000 100 255 1 1500 route-map deny_o
在R1那裡驗證一下
D EX 192.168.40.1 [170/2195456] via 172.16.12.2, 00:03:15, Serial1/0
D 172.16.23.0 [90/2681856] via 172.16.12.2, 00:04:55, Serial1/0
D 172.16.2.0 [90/2297856] via 172.16.12.2, 00:04:55, Serial1/0
D EX 172.16.3.0 [170/2195456] via 172.16.12.2, 00:03:15, Serial1/0
D 172.16.100.0 [90/2297856] via 172.16.12.2, 00:04:55, Serial1/0
D EX 192.168.20.1 [170/2195456] via 172.16.12.2, 00:03:15, Serial1/0
D EX 192.168.35.1 [170/2195456] via 172.16.12.2, 00:03:15, Serial1/0
D EX 192.168.8.0/22 [170/2195456] via 172.16.12.2, 00:03:15, Serial1/0
D 192.168.48.0/22 is a summary, 00:04:55, Null0
成功了！！！
前面有說到OSPF可以在ABR和ASBR上進行路由彙總。在R2上進行了雙向的分布後，R2成為了ASBR，也就是現在可以在R2上對重分布的路由進行路由彙總。分析一下，在R1的環回口上的IP位址192.168.48.0/24-192.168.51.0/24可以彙總成192.168.48.0/22，還有在前面已經在R1的序列槽上配置的EIGRP的路由彙總，現在把它NO掉，之後再在R2上進行OSPF的路由彙總，看一下OSPF在ASBR上是怎樣進行路由彙總的
R1(config-if)#no ip summary-address eigrp 1 192.168.48.0 255.255.252.0
然後在R2上進行路由彙總
R2(config-router)#do show runn | b r o
summary-address 192.168.48.0 255.255.252.0
在R3上對比一下路由表
O E2 172.16.12.0 [110/20] via 172.16.23.2, 01:08:08, Serial1/0
O E2 172.16.1.0 [110/20] via 172.16.23.2, 01:08:08, Serial1/0
O E2 172.16.2.0 [110/20] via 172.16.23.2, 01:08:08, Serial1/0
O IA 172.16.100.0 [110/65] via 172.16.23.2, 01:08:08, Serial1/0
O E2 192.168.51.0/24 [110/20] via 172.16.23.2, 00:00:10, Serial1/0
O E2 192.168.50.0/24 [110/20] via 172.16.23.2, 00:00:10, Serial1/0
O E2 192.168.49.0/24 [110/20] via 172.16.23.2, 00:00:10, Serial1/0
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 01:08:08, Serial1/0
O E2 192.168.48.0/24 [110/20] via 172.16.23.2, 00:00:10, Serial1/0
O 192.168.8.0/22 is a summary, 01:41:31, Null0
O E2 172.16.12.0 [110/20] via 172.16.23.2, 01:10:21, Serial1/0
O E2 172.16.1.0 [110/20] via 172.16.23.2, 01:10:21, Serial1/0
O E2 172.16.2.0 [110/20] via 172.16.23.2, 01:10:21, Serial1/0
O IA 172.16.100.0 [110/65] via 172.16.23.2, 01:10:21, Serial1/0
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 01:10:21, Serial1/0
O 192.168.8.0/22 is a summary, 01:43:45, Null0
O E2 192.168.48.0/22 [110/20] via 172.16.23.2, 00:01:27, Serial1/0
有效果了吧。OSPF的兩種彙總使用的指令是不同的，area * range ***和summary-address ***
最後就是修改管理距離，直接在路由協定程序下，使用distance *** 就OK了！！！
![ospf 3.[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)