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实验拓扑:
实验步骤：
1.在路由器AR1上创建4个环回地址，进入GE0/0/0，配置IP地址，rip summary-address 3.3.0.0 255.255.252.0的意思：在AR1的出接口上手动汇总3.3.0.0/22这条路由信息，启用rip，版本为2，宣告网络；
2.在路由器AR2上配置GE0/0/0的IP地址，启用rip，版本为2，宣告网络；
3.在路由器AR2上通过display ip routing-table 查看路由表。
实验命令：
AR1：
<Huawei>system-view
[Huawei]sysname r1
[r1]int LoopBack 0
[r1-LoopBack0]ip address 3.3.0.1 24
[r1-LoopBack0]int LoopBack 1
[r1-LoopBack1]ip address 3.3.1.1 24
[r1-LoopBack1]int LoopBack 2
[r1-LoopBack2]ip address 3.3.2.1 24
[r1-LoopBack2]int LoopBack 3
[r1-LoopBack3]ip address 3.3.3.1 24
[r1-LoopBack3]quit
[r1]int GigabitEthernet 0/0/0
[r1-GigabitEthernet0/0/0]ip address 192.168.1.1 24
[r1-GigabitEthernet0/0/0]rip summary-address 3.3.0.0 255.255.252.0
[r1-GigabitEthernet0/0/0]quit
[r1]rip 10
[r1-rip-10]version 2
[r1-rip-10]undo summary
[r1-rip-10]network 192.168.1.0
[r1-rip-10]network 3.0.0.0
[r1-rip-10]quit
[r1]quit AR2：
<Huawei>system-view
[Huawei]sysname r2
[r2]int GigabitEthernet 0/0/0
[r2-GigabitEthernet0/0/0]ip address 192.168.1.2 24
[r2-GigabitEthernet0/0/0]quit
[r2]rip 100
[r2-rip-100]version 2
[r2-rip-100]undo summary
[r2-rip-100]network 192.168.1.0
[r2-rip-100]quit
[r2]quit
实验检查：
查看路由器AR2的路由表：
<r2>display ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 8 Routes : 8
Destination/Mask Proto Pre Cost Flags NextHop Interface
3.3.0.0/22 RIP 100 1 D 192.168.1.1 GigabitEthernet
0/0/0
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
192.168.1.0/24 Direct 0 0 D 192.168.1.2 GigabitEthernet
0/0/0
192.168.1.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
192.168.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0你会发现，四个环回地址被汇总成了3.3.0.0/22，大大减少了路由条目。