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ping from PC1 can not reach R1 and PC2.

Unanswered Question
Mar 18th, 2009
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ping from PC1 can not reach R1 and PC2.

I don't know why. I'm testing Vlan

principle. Can anyone help me?


R1 : E0 10.43.6.1, E1 10.43.4.1

SW1 : 10.43.6.2 SW2 : 10.43.4.2

PC1 : 10.43.6.5 PC2 : 10.43.4.5


E0 from R1 connects Port1 from SW1

Port2 from SW1 connects PC1


E1 from R1 connects Port1 from SW2

Port2 from SW2 connects PC2


and here is configuration for SW1

SW1#vlan database

SW1#vlan 20 name test

SW1#conf t

SW1#int FE0/1

SW1#switchport access vlan 20

SW1#int FE0/2

SW1#switchport access vlan 20


SW2#vlan database

SW2#vlan 20 name test

SW2#conf t

SW2#int FE0/1

SW2#switchport access vlan 20

SW2#int FE0/2

SW2#switchport access vlan 20




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Giuseppe Larosa Wed, 03/18/2009 - 01:06
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Hello Sangbong,

you have only one router connected to the two switches


verify on PC1 that you have provided the right default gateway

use ipconfig /all it has to be 10.43.6.1


you can check the ARP table with arp -g on the PC


on the router verify that ip routing is enabled

conf t

ip routing


PC2 has to use as DEf GW 10.43.4.1


Hope to help

Giuseppe


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