[183185] in North American Network Operators' Group
Re: Drops in Core
daemon@ATHENA.MIT.EDU (Scott Whyte)
Mon Aug 17 13:44:49 2015
X-Original-To: nanog@nanog.org
To: Glen Kent <glen.kent@gmail.com>, "nanog@nanog.org" <nanog@nanog.org>
From: Scott Whyte <swhyte@gmail.com>
Date: Mon, 17 Aug 2015 10:44:43 -0700
In-Reply-To: <CAPLq3UNEG+CNEns8Ciu35j5UMtp=LDHJ2RnaQM2qkv6WXqdLzg@mail.gmail.com>
Errors-To: nanog-bounces@nanog.org
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.
>
> Is this correct?
>
> Glen
>
