Agreed, but is there a device that will do just that. The reason I ask is because that is exactly what is needed in a GPON network architecture.
mike On 7/29/08, Brett Frankenberger <[EMAIL PROTECTED]<[EMAIL PROTECTED]>> wrote: > > On Tue, Jul 29, 2008 at 12:43:10PM -0400, Mike Johnson wrote: > > > > What happens if a layer 2 switch receives a frame that needs to be > > forwarded out the same port that the incoming frame was received on? > > It will discard it. > > Back when Layer 2 switches were typically used to connect multiple > shared-media Ethernet segments, this happened all the time -- every > time two nodes on the same shared-media Ethernet segment communicated. > > These days, most switch ports connect only to a single device, but the > operation of Layer 2 switching (which is just bridging) hasn't changed. > > > Im realize that a typical layer 2 switch would never forward that > > packet upstream in the first place. However, If it did in fact happen > > what does the upstream L2 switch do? > > Consider the case of a hub (not a switch) connected to a switch port, > and multiple devices on that hub communicating with each other. The > switch sees all the packets, and doesn't forward them. > > -- Brett > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
