Marketing folks love to use half-duplex when speaking about backplane fabric speed.. Typically they don't do that on the ports themselves, typically..
On Wed, Nov 19, 2014 at 6:05 PM, Jay Hennigan <j...@west.net> wrote: > On 11/18/14, 2:16 AM, M K wrote: > > Hi all , we were arguing about the full duplex FE interface and it's > speedIs it true that this interface can handle 100Mbps send and 100Mbps > receive at the same time? like it is 200Mbps ? > > To be more precise, the throughput in either direction is limited to 100 > Mbps but traffic can flow in both directions at the same time. > > If you have an expressway with lanes in both directions and a speed > limit of 100 MPH, you don't call it a 200 MPH expressway. (That's > full-duplex). > > If you have a single-lane road with a speed limit of 100 MPH then you > can transmit at up to 100 MPH in one direction at a time. Attempting to > transmit in both directions at the same time results in what is referred > to as a collision. Collisions reduce throughput as the debris must be > cleaned up and then retried. > > Salespeople have been known to refer to T-1 circuits as 3Mbits/s and > 100Mbps full-duplex Ethernet as 200 Mbits/s. This is considered to be > nitrogen-rich organic fertilizer by those with clue. > > -- > Jay Hennigan - CCIE #7880 - Network Engineering - j...@impulse.net > Impulse Internet Service - http://www.impulse.net/ > Your local telephone and internet company - 805 884-6323 - WB6RDV > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/