I'm pretty new to networking and I've just got started into using cisco packet tracer (a network simulator program).

My topology is basically a router, two switches connected to this router and per switch there are two computers.

one switch is connected on fastethernet0/0 ( the other is connected on fastethernet0/1 (

Now if I use one of the computers on one switch to ping to one on the other switch it fails... however, computers on the same switch can ping each other and the router...

Like I said... I'm pretty new and I might be missing something here.

Can anyone help me figure this out?

Thanks in advance! Dempsey

closed as off topic by pauska, TheCleaner, Tim Brigham, mdpc, Tom O'Connor May 14 '13 at 22:44

Questions on Server Fault are expected to relate to server, networking, or related infrastructure administration within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here. If this question can be reworded to fit the rules in the help center, please edit the question.

  • Is there a route between the two networks? You might want to add some static routes on the router and on the computers. On computers, set the right gateway, on the router check the routes to see wich network is bound on each physical interface. – mimipc May 14 '13 at 13:52
  • Oh my... It was related to NOT setting the default gateway. Sorry – Dempsey FoxDie Van Assche May 14 '13 at 14:10

You will need to make sure that you have put a default gateway into each of the computers. No routes will be needed in your lab yet because the router will see each of the networks as connected.

Not the answer you're looking for? Browse other questions tagged or ask your own question.