On Thu, May 08, 2003 at 01:19:48PM +0200, Hagen Paul Pfeifer wrote: > * Tace | 2003-05-08 07:52:50 [+0700]: > > >Hi, > > What's Ethernet Jamming Signal? > > Sorry, my failure! > > CSMA/CD - Jamming Signal > > When a controller detects a collision on the wire he sends a jamming signal. > All nics in the segment now realize that a collision take place. > I hope that some nics provide some statistic informations!? > > >Tace > > Hagen > > -- > Universe.SYS corrupted. Reboot? [Y/N] > - > : send the line "unsubscribe linux-net" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html My understanding of CSMA/CD collision detection is that NIC's operating in half-duplex mode listen while transmitting, detecting a foreign transmission during that time as a collision - any other NIC's transmitting during that period should likewise detect the collision. Any full-duplex links _should_ be unaffected, depending on switching mode (cut-through, fragment-free, store-and-forward) - switches should buffer the frames, dropping invalid frames. I do not believe there is a "jamming signal" - frames involved in a collision will be damaged and dropped. -- Darrell A. Escola, CCNA, Linux+ - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
