Your limit is simply that the RT-N15 is a 2.4GHz only radio The 300Mb/s advertised is one of those wonderful if only no one else used it and you had 5 more channels with no overlap to bond together. this will never be seen on 2.4GHz. 2.4GHz has 3 non overlapping channels and if 802.11N with channel bonding is used 1. The airport on the other hand is an ABGN simultaneous Dual band radio that can bond several 5GHz channels together (less cross talk on these channels (and much less pollution)) to be honest it's kinda amazing that you get 70Mb/s on 2.4GHz :) I run a cisco ap and abgn card in a separate AP and see sustained 250Mb/s link speed over that On Tue, Aug 21, 2012 at 12:17 PM, Toby Corkindale <toby.corkindale@strategicdata.com.au> wrote:
Hi, Wifi is not something I consider myself an expert upon. I understand the security problems with WEP, WPS, WPA and WPA2 fairly well, and I've read some docs on fragmentation, RTS thresholds, and channel width. I don't consider myself a newbie here either.
Try as I might, I just can't seem to get decent performance out of my home network. It's a 802.11n network, theoretically 300 mbit/s, however testing with iperf between a Linux wireless laptop and a wired linux server results in 60-70 mbits reported in either direction.
I tried fiddling with a few options on the router, such as: * disabling a/b/g support. (no effect) * disabling pre-spec-N support. (no effect) * lowering RTS threshold slightly (lower throughput) * lowering fragment threshold (no effect at small changes; perf slightly increases (~5mbit) as fragments decrease for a while, then after a point (around ~2000 bytes) performance just drops as you decrease size.) * WMM no-ack mode (totally wrecked performance)
I'm using a Broadcom chipset in the laptop, which seems to have reasonable Linux support. I'm using the opensource brcmsmac driver on a 3.2.0 kernel. The AP is an Asus RT-N15, which also runs Linux, although I'm still on the vendors firmware.
So, no matter what I've done, I can't get more than 75 mbits, and on default settings its more like 65 mbits between these two Linux devices. However a friend with an Apple Mac laptop and an Apple airport AP can push about 200 mbit/s according to iperf!
So.. I just wondered if anyone has some hints about how to improve wifi performance?
I also wondered what sort of bitrates you see? And if someone is getting good speeds, can you report your hardware (incl. chipset) and configuration options?
thanks! Toby _______________________________________________ luv-main mailing list luv-main@luv.asn.au http://lists.luv.asn.au/listinfo/luv-main