Michael Powell <nightre...@verizon.net> writes: > You are running Ethernet, right? CSMA/CD is part of the Ethernet framing > protocol. It is present in the protocol independent of simplex/duplex, etc. > As such the timing windows contain non-infinite discreet value ranges. It is > integral to Ethernet and does not get 'switched off' or disappear just > because a link is full-duplex.
I call your attention to the specification (IEEE 802.3) for Ethernet: 1.1.1 Basic concepts This standard provides for two distinct modes of operation: half duplex and full duplex. A given IEEE 802.3 instantiation operates in either half or full duplex mode at any one time. The term CSMA/CD MAC is used throughout this standard synonymously with 802.3 MAC, and may represent an instance of either a half duplex or full duplex mode data terminal equipment (DTE), even though full duplex mode DTEs do not implement the CSMA/CD algorithms traditionally used to arbitrate access to shared-media LANs. -- Lowell Gilbert, embedded/networking software engineer, Boston area http://be-well.ilk.org/~lowell/ _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"