You are right the 100Mbps is pure network dynamics. right now we are adapting a wait and see but your added war story means we have to do more watching as well
Raymond Macharia On Wed, Aug 5, 2009 at 4:52 PM, Fred Baker <f...@cisco.com> wrote: > That is very much to be expected, if nothing else due to pent-up demand. > The existing vsat infrastructure tends to be pretty saturated, meaning that > users experience a lot of loss as well as delay. What if they stop losing > traffic? > > War story: in 1995 I found myself sharing a podium with Phill Gross, who > was then a VP with MCI. He was more or less apologizing for the behavior of > his network. They had recently upgraded to a then-new-and-gee-whiz OC-3 > infrastructure, in many places using parallel bandwidth, and were dropping a > lot - he reported one link to be dropping 20%. So they then upgraded the > whole thing to OC-12 - and fiber that was OC-3 was replaced with an OC-12. > They presumed that this would give them 75% overprovisioning at worst. What > they actually saw was that those links that had been dropping 20% were now > dropping 4%. TCP observed that it was not getting crunched into the ground, > and started opening its windows. > > The other big issue with satcom is of course delay, and with conversion to > fiber the delay plummets. That means that where you might have had <mumble> > connections running at <low> average speed due to RTT, the average > connection speed for the same session is instantly multiplied by > <old-RTT>/<new-RTT>. That gives the user time and incentive to click again > during that same time window - new load. > > Price is very important, of course, but I suspect your 100 MBPS is > explainable by simple network dynamics. > > > On Aug 5, 2009, at 6:13 AM, Raymond Macharia wrote: > > Hello all,in the last two weeks or so providers in East Africa, >> particularly >> in Kenya where I am, have been moving from Satellite to Fibre for the >> internet Back bone connectivity. From where I am I have seen an upsurge of >> about 100Mbps in the last two days from my users. It would be interesting >> to >> know if anyone out there has seen an increase in traffic from this region >> and by how much. There is more to come as providers are cutting prices and >> adding bandwidth to their networks. >> >> Best Regards >> >> Raymond Macharia >> > >
