一、实验拓扑：
和10.1相同
四、验证：
1、默认就是Round-robin：轮循下方MAC地址
PC3#show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.10.3 - cc0b.f7cc.0000 ARPA FastEthernet0/0
Internet 192.168.10.254 0 0007.b400.0101 ARPA FastEthernet0/0

PC4#show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.10.4 - cc0a.f7cc.0000 ARPA FastEthernet0/0
Internet 192.168.10.254 0 0007.b400.0102 ARPA FastEthernet0/0

PC5#show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.10.5 - cc09.f7cc.0000 ARPA FastEthernet0/0
Internet 192.168.10.254 0 0007.b400.0101 ARPA FastEthernet0/0

PC6#show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.10.6 - cc0c.f7cc.0000 ARPA FastEthernet0/0
Internet 192.168.10.254 0 0007.b400.0102 ARPA FastEthernet0/0
2、传数据时轮流传数据：
PC3#traceroute 3.3.3.3
Type escape sequence to abort.
Tracing the route to 3.3.3.3

1 *
192.168.10.2 28 msec 16 msec
2 23.1.1.3 44 msec 40 msec 40 msec

PC4#traceroute 3.3.3.3
Type escape sequence to abort.
Tracing the route to 3.3.3.3

1 192.168.10.1 1028 msec 16 msec 12 msec
2 *
192.168.10.2 88 msec 16 msec
3 23.1.1.3 44 msec 76 msec 60 msec

PC5#traceroute 3.3.3.3
Type escape sequence to abort.
Tracing the route to 3.3.3.3

1 *
192.168.10.2 40 msec 20 msec
2 23.1.1.3 84 msec 20 msec 20 msec

PC6#traceroute 3.3.3.3 //这种很奇怪，Ping的时候2条路线抓包，都会有10个Ping包；但是第二次再Ping就只走一个方向
Type escape sequence to abort.
Tracing the route to 3.3.3.3

1 192.168.10.1 16 msec 16 msec 20 msec
2 192.168.10.2 24 msec 36 msec 24 msec
3 23.1.1.3 64 msec 60 msec 52 msec