On 1/24/11 7:48 PM, Aaron Riemer wrote: [snip]
Obviously this is not the case. Therefore my question is what determines if a port is physically "UP"? What physical checks are done by the switch port and how does it determine if media is attached? Is a frame received over the fibre initially which brings the port up but a subsequent failure will go on undetected?
Port "up" (for many forms of Ethernet, newer technologies notwithstanding) is unilateral: if port is receiving properly-formatted pulses, port is up. Unfortunately, "properly-formatted" has a very small definition in the Ethernet world. TDM technologies (DSx, OCx) have better alarm capabilities integrated into "properly-formatted", and therefore provide a more complete end-to-end status (partially because of their point-to-point nature).
I miss working with TDM. pt _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
