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标题: [讨论] 为什么三层交换机添加ip routing 电脑就不能互相访问,也ping 不通路由器了呢?  ( 查看:654  回复:24 )   
 
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发表于:2007-11-14 14:20　 　标题：为什么三层交换机添加ip routing 电脑就不能互相访问,也ping 不通路由器了呢?
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为什么三层交换机添加ip routing 电脑就不能互相访问,也ping 不通路由器了呢?

今天利用boson做实验,进行vlan 间路由配置, 路由器fa 0/0 IP:192.168.1.254,  se 1/0 IP:10.10.10.2       3550交换机 fa 0/12连路由器的fa 0/0 并划分两个VLAN,vlan 2 和 vlan3  , 3550的fa 0/1连接下面的2950  , 3550的fa 0/2连另外一台2950 ,当再3550上添加路由协议(ip routing)的时候,结果PC1不能ping 通PC2 也ping 不通 192.168.1.254 或10.10.10.2    ,请教各位高手这个是什么原因啊?    PC1 连接到2950 ,PC2连另外一个2950       PC1 ip:192.168.2.2  255.255.255.0   192.168.2. 254      PC2: ip:192.168.3.3  255.255.255.0  192.168.3.254     

配置如下:
路由器Rout(4500)
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

SW1(3550)配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

sw2(2950)配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

另外一台2950配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms为什么三层交换机添加ip routing 电脑就不能互相访问,也ping 不通路由器了呢?

今天利用boson做实验,进行vlan 间路由配置, 路由器fa 0/0 IP:192.168.1.254,  se 1/0 IP:10.10.10.2       3550交换机 fa 0/12连路由器的fa 0/0 并划分两个VLAN,vlan 2 和 vlan3  , 3550的fa 0/1连接下面的2950  , 3550的fa 0/2连另外一台2950 ,当再3550上添加路由协议(ip routing)的时候,结果PC1不能ping 通PC2 也ping 不通 192.168.1.254 或10.10.10.2    ,请教各位高手这个是什么原因啊?     PC1 ip:192.168.2.2  255.255.255.0   192.168.2. 254      PC2: ip:192.168.3.3  255.255.255.0  192.168.3.254     

配置如下:
路由器Rout(4500)
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

SW1(3550)配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

sw2(2950)配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

另外一台2950配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

今天利用boson做实验,进行vlan 间路由配置, 路由器fa 0/0 IP:192.168.1.254,  se 1/0 IP:10.10.10.2       3550交换机 fa 0/12连路由器的fa 0/0 并划分两个VLAN,vlan 2 和 vlan3  , 3550的fa 0/1连接下面的2950  , 3550的fa 0/2连另外一台2950 ,当再3550上添加路由协议(ip routing)的时候,结果PC1不能ping 通PC2 也ping 不通 192.168.1.254 或10.10.10.2    ,请教各位高手这个是什么原因啊?     PC1 ip:192.168.2.2  255.255.255.0   192.168.2. 254      PC2: ip:192.168.3.3  255.255.255.0  192.168.3.254     

配置如下:
路由器Rout(4500)
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

SW1(3550)配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

sw2(2950)配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

另外一台2950配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms为什么三层交换机添加ip routing 电脑就不能互相访问,也ping 不通路由器了呢?

今天利用boson做实验,进行vlan 间路由配置, 路由器fa 0/0 IP:192.168.1.254,  se 1/0 IP:10.10.10.2       3550交换机 fa 0/12连路由器的fa 0/0 并划分两个VLAN,vlan 2 和 vlan3  , 3550的fa 0/1连接下面的2950  , 3550的fa 0/2连另外一台2950 ,当再3550上添加路由协议(ip routing)的时候,结果PC1不能ping 通PC2 也ping 不通 192.168.1.254 或10.10.10.2    ,请教各位高手这个是什么原因啊?     PC1 ip:192.168.2.2  255.255.255.0   192.168.2. 254      PC2: ip:192.168.3.3  255.255.255.0  192.168.3.254     

配置如下:
路由器Rout(4500)
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

SW1(3550)配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

sw2(2950)配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

另外一台2950配置
Router>
Router>en
Router#con t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#interface serial 1/0
Router(config-if)#ip address 10.10.10.2 255.255.255.224
Router(config-if)#ip
Router(config-if)#ip nat outside
Router(config-if)#no shutdown
%LINK-3-UPDOWN: Interface Serial1/0, changed state to up
Router(config-if)#exit
%LINK-3-UPDOWN: Interface Serial1/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
Router(config)#ip nat inside source list 1 interface serial 1/0
Router(config)#ip nat inside source list 1 interface serial 1/0 overload
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.2
Router(config)#exit
Router#cpy
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms
Router#
Router#
Router#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5), round-trip min/avg/max = 1/2/4 ms

网络工程师到底该不该去考CCIE认证？
2007-11-14 14:201楼
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caoleni123
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发表于:2007-11-14 14:31　
用的模拟器啊，是不是boson有问题，用真实机做做试试~

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2007-11-14 14:312楼
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szh608
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发表于:2007-11-14 14:52　
是的,用的是boson模拟器,我试了好多遍就是ping不通啊

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2007-11-14 14:523楼
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fobkem2001
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发表于:2007-11-14 15:03　
模拟器问题自己换真实的做吧

【MVP】马上申请成为“微软最有价值专家”
2007-11-14 15:034楼
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subchen
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发表于:2007-11-14 15:48　
你看一下路由表sh ip ro

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2007-11-14 15:485楼
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cwfsxlove
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  QQ       
发表于:2007-11-14 17:27　
你知道三层交换机工作原理吗？
你的两台PC的网关192.168.2.254和192.168.3.254，请问配置在哪里，网关都没你让数据包发给谁哦？
这里要想通，三层交换机起IP　ROUTING，并且至少应该配置静态路由吧？3550的具体配置两年没接触了，但是不是起了IP　ROUTING就可以，还要配置东西，你网上搜索下三层交换机起三层功能后的配置细节。
这3550不起三层功能，通过路由器也可以实现VLAN间路由，这就是常见的单臂路由。实现是通过配置子接口的方法实现，很简单

网络工程师到底该不该去考CCIE认证？
2007-11-14 17:276楼
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denghanwen
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发表于:2007-11-14 22:02　 　标题：真的很不错！谢谢啦！
真的很不错！谢谢啦！

网络工程师到底该不该去考CCIE认证？
2007-11-14 22:027楼
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小侠唐在飞
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发表于:2007-11-14 22:26　
累啊..看完至少半天..

【欢迎访问小侠唐在飞技术博客http://xiaoxia.blog.51cto.com】
2007-11-14 22:268楼
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cwfsxlove
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  QQ       
发表于:2007-11-14 23:21　
你去这个地址下载三层交换机作VLAN间路由的配置方法,是我发在51CTO上的,你可以下来看看:
http://bbs.51cto.com/viewthread.php?tid=433832&highlight=

网络工程师到底该不该去考CCIE认证？
2007-11-14 23:219楼
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weixiao520
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发表于:2007-11-19 21:26　
jhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

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2007-11-19 21:2610楼
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statue007
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发表于:2007-11-20 08:37　
真是好东西  谢谢楼主 哈哈

网络工程师到底该不该去考CCIE认证？
2007-11-20 08:3711楼
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lygzhangbo
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发表于:2007-11-28 09:53　
楼上的怎么乱回复啊  哈哈哈…………………………

网络工程师到底该不该去考CCIE认证？
2007-11-28 09:5312楼
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lixiaomingkira
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  QQ       
发表于:2007-12-11 15:13　
最好你画个图吧ROUTER4500在那里啊 ?
怎么都不清楚啊 .....其实三层交换机....分配了VLAN后....又起用三层路由的话  应该在连接的路由器应该起用虚拟子接口

网络工程师到底该不该去考CCIE认证？
2007-12-11 15:1313楼
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xueqinhe
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发表于:2007-12-11 15:52　
莫名其妙,接入的交换机配IP NAT INSIDE搞什么呢?

网络工程师到底该不该去考CCIE认证？
2007-12-11 15:5214楼
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快乐星期天
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发表于:2007-12-11 16:18　
boson模拟器本身就没三层交换的功能,换模拟器

网络工程师到底该不该去考CCIE认证？
2007-12-11 16:1815楼
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sl_szq
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发表于:2007-12-12 10:40　
不错,又学到新知识了,谢谢各位

网络工程师到底该不该去考CCIE认证？
2007-12-12 10:4016楼
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frogman
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  QQ       
发表于:2007-12-13 09:27　
不错，今天又学习到了新的知识！谢谢楼上诸位兄弟了！

网络工程师到底该不该去考CCIE认证？
2007-12-13 09:2717楼
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forteibj
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发表于:2007-12-13 16:26　
好东西  谢谢楼主 !!!!!!!!!!!!!!!!!!!!!!!!!!!

网络工程师到底该不该去考CCIE认证？
2007-12-13 16:2618楼
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robertlala
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发表于:2007-12-16 15:49　
人家有问题，不是叫你们学习，大哥，帮他解决啊

网络工程师到底该不该去考CCIE认证？
2007-12-16 15:4919楼
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zbh87330
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发表于:2008-1-6 18:36　
多多分析别人出的问题,才能避免自己在以后少出同样的问题!

网络工程师到底该不该去考CCIE认证？
2008-1-6 18:3620楼
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lygzhangbo
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发表于:2008-1-6 18:54　
太长了 不想看 ，但是俺建议用  DYNAMIPS  如果内存足够大的话……