[156520] in North American Network Operators' Group
Re: Big Temporary Networks
daemon@ATHENA.MIT.EDU (Masataka Ohta)
Wed Sep 19 04:26:34 2012
Date: Wed, 19 Sep 2012 17:25:33 +0900
From: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
To: nanog@nanog.org
In-Reply-To: <50597345.1080204@dds.nl>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Seth Mos wrote:
> Yes, radvd has a configuration option to send unicast packets. But I
> think the effects are slightly overstated.
A senario considered by IEEE11ai is that a very crowded train
arrives at a station and all the smart phones of passengers
try to connect to APs.
Then, it is essential to reduce the number of control packet
exchanges.
> Also note that some wifi networks eat DHCPv4 broadcasts too,
As I already stated, DHCP discover/request from STA to AP is
unicast.
> And if the wifi network is so bad that you have icmp and udp dropping
I'm afraid you don't understand CSMA/CA at all.
Masataka Ohta
