一、 拓扑图

二、配置

步骤:

1.基础配置

router配置:

interface FastEthernet0/0
 ip address 192.168.2.254 255.255.255.0
 
interface FastEthernet0/1
 ip address 192.168.1.254 255.255.255.0


Switch配置:

稍后配置

 

pc0配置:

ip: 192.168.1.2/24

gw:192.168.1.254

 

pc1配置:

ip: 192.168.1.2/24

gw:192.168.2.254

 

2. 解决问题

1)、如何给switch配置ip 地址

switch的ip是基于vlan的(这个问题等会再说)。配置:

interface Vlan1
 ip address 192.168.1.3 255.255.255.0

 

结果:

PC>ping 192.168.1.3

Pinging 192.168.1.3 with 32 bytes of data:

Reply from 192.168.1.3: bytes=32 time=31ms TTL=255
Reply from 192.168.1.3: bytes=32 time=31ms TTL=255
Reply from 192.168.1.3: bytes=32 time=31ms TTL=255
Reply from 192.168.1.3: bytes=32 time=31ms TTL=255
 

2)、怎么实现pc0 telnet到switch

配置:

line vty 0 4
 password cisco
 login
 

结果:

PC>telnet 192.168.1.3
Trying 192.168.1.3 ...Open


User Access Verification

Password:
Switch>

Switch>enable
% No password set.
Switch>

如果想进的exec 配置模式

switch还需要配置:

enable password config

结果:

Switch>enable
Password:
Switch#

3)、 实现pc1 telnet到switch

PC>ping 192.168.1.3

Pinging 192.168.1.3 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

结果是ping不同的。分析---因为pc1的一个“外网的数据包”发给网关,即router。router查路由表,目的是192.168.1.3 是直连。发给switch,switch收到后,回复数据包,但switch没有路由表,说以要设置一个网关给它,配置:

ip default-gateway 192.168.1.254

 

结果:

PC>ping 192.168.1.3

Pinging 192.168.1.3 with 32 bytes of data:

Reply from 192.168.1.3: bytes=32 time=63ms TTL=254
Reply from 192.168.1.3: bytes=32 time=63ms TTL=254
Reply from 192.168.1.3: bytes=32 time=63ms TTL=254
Reply from 192.168.1.3: bytes=32 time=62ms TTL=254

 

 

PC>telnet 192.168.1.3
Trying 192.168.1.3 ...Open


User Access Verification

Password:
Switch>enable
Password:
Switch#
 

最后留一个问题:希望读者给个补充:在“不同vlan的telnet” 或者是“ 非本针vlan 的telnet ”怎么配置?