nanog mailing list archives
Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality]
From: Mike Hammett <nanog () ics-il net>
Date: Sat, 28 Feb 2015 08:19:09 -0600 (CST)
WiFi also has 50% overhead, so cut all modulation rates in half. That 300 meg modulation under the best conditions only does 150 megabit aggregate. The problem with WiFi is that IEEE keeps rolling out larger and larger channels when they're not even usable due to interference. IEEE needs to implement AP syncing and *SMALLER* channels. let hte AP dynamically control the size of the channel as needed. Only have a 25 meg Internet service? Use a 5 MHz channel, not 160 MHz. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com ----- Original Message ----- From: "Philip Dorr" <tagno25 () gmail com> To: "Miles Fidelman" <mfidelman () meetinghouse net> Cc: nanog () nanog org Sent: Friday, February 27, 2015 11:15:17 PM Subject: Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] On Feb 27, 2015 6:48 PM, "Miles Fidelman" <mfidelman () meetinghouse net> wrote:
Jack Bates wrote:On 2/27/2015 2:47 PM, Miles Fidelman wrote:Folks, Let's not go overboard here. Can we remember that most corporate and
campus (and, for that matter home) networks are symmetric, at least at the edges. Personally, I figure that by deploying PON, the major carriers were just asking for trouble down the line. It's not like carrier-grade gigE switches are that much more expensive than PON gear.
I'll disagree on the home part. I doubt that most homes are symmetric.Just to be clear - I'm talking about the local switch/router sitting on a
home network, not the connection to the outside world. Last time I looked, commodity gigE switches were symmetric - good for network attached storage, media servers, that sort of thing. (Come to think of it, though, I've never paid attention to whether the WiFi side is symmetric.) Commodity switches are symmetric for multiple reasons, but the biggest is probably because a server could be on any port and a client on any other port. WiFi has two separate data rate selections. The download could be at 300mbps and the upload only be at 1mbps. Or even the other way. WiFi is also half-duplex, so if the data rate is 300mbps, then the maximum you should expect is 150mbps.
Current thread:
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality], (continued)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Jack Bates (Feb 27)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Stephen Satchell (Feb 27)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Scott Helms (Feb 27)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Jack Bates (Feb 27)
- RE: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Naslund, Steve (Feb 27)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Jack Bates (Feb 27)
- RE: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Naslund, Steve (Feb 27)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Miles Fidelman (Feb 27)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Philip Dorr (Feb 27)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Mark Tinka (Feb 27)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Mike Hammett (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] James R Cutler (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Mike Hammett (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Stephen Satchell (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Mike Hammett (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Michael Thomas (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Mike Hammett (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Michael Thomas (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Miles Fidelman (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Mike Hammett (Feb 28)
- Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality] Owen DeLong (Feb 28)