I have created a simple bus topology connecting 2 switches and a router, with each switch connected to their respective end devices through ordinary star topology. The switch model used was 3560-24PS and the router's was 2811.

1. I have created a VLAN for each switch and assigned the interfaces connected to the end devices to the same VLAN, to form a subnet. Namely, Switch 1 end devices are part of VLAN 10 and Switch 2 devices part of VLAN 20.

2. Next, I configured the interfaces of each switch that is connected to each other, and the interface of switch 2 which is connected to the router to be trunk ports, and enabled traffic for both VLANs.

3. Then, I configured inter-VLAN routing in the router by configuring the router port interface connected to Switch 3 with 2 subinterfaces for each VLAN to act as each's default gateway.

4. Finally, I configured each end device of both VLANs with static IPs and their respective default gateways. The default gateway of devices of VLAN 10 are configured with the IP of its router subinterface: 192.168.10.1 and VLAN 20: 192.168.20.1

Nevertheless, when attempting to send a simple PDU between a device in VLAN 10 to a device in VLAN 20, it shows "Failed". I tried pinging too using the command prompt. Why is this the case? Is there something that I am missing or overlooking? I have been extensively looking up resources online for days and cracking my skull, and tried different steps but to no avail. Please do help me as I need to figure this out to successfully carry out inter-VLAN communication for my networking module assignment for university which is a lot more complex than this simple example.

I am attaching the packet tracer file for this example:

Packet Tracer File

Thank you very much in advance! :)

posted 3 months ago

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3mo ago by Alexei‭

Phoenix‭

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