blumenth@BBN.COM (Steve Blumenthal) (12/23/88)
Gene, Thanks for your note. Please be sure to notify the ARPANET NOC at BBN about the power outage. Their telephone number is 1-800-492-4992. I'm not sure that the controllers are regular readers of the tcp-ip mailing list. Besides the three cross country links being carried as streams by the Wideband Net, there are two 56kb/s point-to-point VSAT lines between PSNs at MIT and SRI. Since these are also satellite links, they will also incurr the 250-300 msec delays as do the Wideband Net stream trunks. I believe that time constants in the ARPANET PSN routing software have been adjusted to favor putting traffic over the Wideband Net streams and VSAT lines, even though they represent a real higher packet delay. This was done to balance the load on the cross country links and to keep the only terrestrial path from being congested. Under light load conditions, the loss of the terrestrial path would probbaly be more noticeable than under moderate to heavy load. Steve Blumenthal BBN