On Mon, Aug 17, 2015 at 1:44 PM, Scott Whyte <swhyte@gmail.com> wrote:
On 8/15/15 09:47, Glen Kent wrote:
Hi,
Is it fair to say that most traffic drops happen in the access layers, or the first and the last miles, and the % of packet drops in the core are minimal? So, if the packet has made it past the first mile and has "entered" the core then chances are high that the packet will safely get across till the exit in the core. Sure once it gets off the core, then all bets are off on whether it will get dropped or not. However, the key point is that the core usually does not drop too many packets - the probability of drops are highest in the access side.
What do these terms mean in a world where my EC2 VM talks to my GCE VM? It doesn't seem unreasonable that the DC bandwidth on either end dwarfs the "core" capacity between the two.
there's some other work going on: <http://www.bitag.org/documents/BITAG_Press_Release_-_Announcing_Prioritization_and_Differential_Treatment_Topic.pdf> which pokes a bit at this idea of packet drops (from the 'what if I prioritize traffic? or differentiate between traffic types?' perspective). I imagine that a topic of conversation is that: "hey, do we get meaningful drop numbers, or does prioritization/differentiation matter, in the core of a network or only at the network edges?" mostly bitag is focused on 'consumer' edges, so they may not look at 'inside a a datacenter' problems.