>Date: Wed, 30 Oct 1996 14:19:33 -0500 >From: [email protected] (Doug McKean) > >Does anyone know of any standard for 'back pressure signaling'? > >This signal is used when a node's throughput is backing up and >the transmission rate from the upstream node is slowed to match >the recieve rate of the downstream node. I 'think' this is >Ethernet, but not sure.
Doug, I don't believe that this has anything to do with Ethernet, which is a collision sense/detect LAN packet transmission protocol. The feature you describe _is_ implemented in "frame relay" circuits, where it is called BECN (Backwards Explicit Congestion Notification), but frame relay is carried over T1, E1 or the old DDS 56kbps circuits, not Ethernet. However, frame relay is often used to link Ethernet LANs together into a WAN (Wide Area Network) using routers that are frame relay on one "side" and Ethernet on the other "side". For more information on frame relay, you can check out the Frame Relay Forum URL: http://www.frforum.com/ ------------------------------------------------------------------ John Combs, Senior Project Engineer, ITS/TestMark Laboratories Email: [email protected] URL: http://www.testmark.com ------------------------------------------------------------------
