要求R2能远程登陆上R1（使用password）方式

第一种方式：

[R1]

[R1]int e0/0/0

[R1-Ethernet0/0/0]ip address 12.1.1.1 24

[R1]user-interface vty 0 4

[R1-ui-vty0-4]authentication-mode password

[R1-ui-vty0-4]set authentication password cipher 123456

[R2]int e0/0/0

[R2-Ethernet0/0/0]ip address 12.1.1.2 24

[R2-Ethernet0/0/0]q

[R2]q

telnet 12.1.1.1

第二种方式：使用aaa认证

[R1]interface e0/0/0

[R1-Ethernet0/0/0]ip address 12.1.1.1 24

[R1-Ethernet0/0/0]q

[R1]user-interface vty 0 4

[R1-ui-vty0-4]authentication-mode aaa

[R1-ui-vty0-4]q

[R1]aaa

[R1-aaa]local-user huawei password cipher 123456

[R1-aaa]local-user huawei privilege level 3

[R1-aaa]local-user huawei service-type  telnet

[R2]int e0/0/0

[R2-Ethernet0/0/0]ip address 12.1.1.2 24

[R2-Ethernet0/0/0]q

[R2]

[R2]q

telnet 12.1.1.1