Still not working, are some of my configs for the router and switches. It's driving me nuts, is there a problem with my logic? I also tried setting up static routes but it still isn't working. My logic is that PC2 sends the packet to the default gateway, the router sends it out the sub interface associated with PC3's subnet and the switch sends it to PC3. The computer can ping each interface vlan IP of the layer 2 switches. So far I have two 2900 switches and a computer. When I check the router's interfaces in show int, it clearly shows the interface up, and VLAN id being correct. Hi all, I'm using packet tracer version 6.0.1 and I need to connect a switch to a router. When I check to see how the packet is moving through the network, for example from PC 2 to PC 3 it reaches switch 1, switch 1 sends it to the router, the router says there isn't a sub interface with this VLAN enabled and then drops the packet. Also, PC 2 and 3 cannot communicate with PC 0 and 1 and vice versa. It’s not necessary to enable it on the interface of the switch to PC. Note: Try to enable trunking mode only to interface between to switch or router devices. Now the VLANs can transmit traffic over the FastEthernet 0/1 without any problems. The problem I am facing is PC0 and PC1 can talk to each other without an issue, however PC 2 and 3 cannot. Switch(config)interface fastEthernet 0/1 Switch(config-if)switchport mode trunk Switch(config-if) 2. I also set the IP address default gateways for the end devices for these sub interfaces. I created sub interfaces on the router as well. I currently have both switches trunked to ports fa 0/0 and 0/1 of the router. I am having trouble routing between 2 switches and 1 router.
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