which band are you getting the 75/20 from ? is the 40Mhz Channel Width Enabled? check your MTU Settings and if you are running QoS check to see if you are specifying a incorrect max bandwidth number.
my Comcast 105/20 gets 125/25 on both Ethernet AND both 2.4/5G WiFi's
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This was done over 5G WiFi with another device streaming a netflix video on the LAN as of 5 minutes ago.
http://results.speedtest.comcast.net/result/1039372004.png
if 40Mhz is enabled, then something is not right. if its still on the 20Mhz, then switch it to either 20/40 Co-exist or just plain out drop the 20MHz option altogether.
contrary to most people's beliefs, DO NOT USE a channel other than 1, 6 or 11.
all those other channels are for low bandwidth people because of the spacing in the band itself. and even at that, WiFi specifications call for 30MHz +/- from the Center of the Channel's frequency. 15MHz in each direction
so if you use channel 1, you are dipping into Channels 2 and 3 with the bandwidth spacing, as WiFi channels are only 5MHz apart in spacing. at least for the 2.4 GHz band.
id run a RF Tool such as inSSider and see how many other networks are in your local vicinity of YOUR router and devices.
read more here:
The WiFi Adjacent Channel Myth
The best way to differentiate between dual band. is make a SSID Name, then for the 5GHz band, add a -5G to the same SSID.
so my LAN, is Alpha and Alpha-5G.
This way you can have 1 password, but know which band you are connecting to.
Those Cisco EA series routers have been known to bog down after some time of use. routine power cycles are required for them.
my self i use Amped Wireless 600mW AP's tied into a Cisco Catalyst 3750 Gigabit Switch where a single AP provides the link for the two high power AP's. ( I recently changed this from a actual wired connection to the AP's ) this link is hidden and uses a static IP to talk to the Catalyst and the two AP's. everything else is DHCP. everything but the second floor of my 4700 SQ Foot house is wired with Cat 6 Gigabit. the AP's are located equally spaced on each side of the house on the first floor from a central point. the basement, first and second floor PLUS my 1.25 Acre Yard from street to backyard fence is covered with at least 3/5 bars of signal.
KB0 makes a very valid point. the longer the distance to the remote server, the less speed. because you have to bounce soo many nodes and the average user has ZERO clue what the node's capacity is, what its current load is, where node outages may be happening and offloading is going on.
