Finally, if your OSPF adjacencies do not form as expected, make sure to use your OSI model knowledge to approach the problem. Since we're dealing with an NBMA network, the hub cannot dynamically discover its neighbors.By paying special attention to these details, you're that much close to CCNA exam day success and earning your certification. Neighbor statements are not needed on the spokes.

They don't hurt anything, but they don't do anything, either. I recommend that you get some experience with configuring OSPF hub-and-spoke before taking the CCNA exam, because it's by actually performing tasks such as this that makes you supremely confident on CCNA test day. The issue may actually be at Layer Two, with your Frame Relay configuration. Let's take a quick look at several common OSPF configuration errors and how to avoid them on your CCNA test.

That's a tough way to get started, because a hub-and-spoke configuration built over an NBMA technology such as Frame Relay requires quite a bit of attention to detail. If you don't use the "broadcast" option on your frame relay statements, OSPF hellos will not be transmitted successfully between potential neighbors..Configure neighbor statements on the hub.

CCNA certification demands that you master Graphic Customization 200A Three Phase Relay the basics of OSPF, and for many studying for the CCNA exam, their first exposure to OSPF is a hub-and-spoke configuration. This not only ensures that the hub wins the DR election with its default OSPF interface priority of 1, but it prevents the spokes from ever having a chance to become the DR or BDR. OSPF hellos are multicast, but the "broadcast" option for Frame Relay includes multicasts. This is done by setting the OSPF interface priority to zero on the spoke routers.Make sure the hub is the designated router and that there are no backup designated routers

Megosztás a facebookon