Cyber Akuma Posted August 23, 2013 Share Posted August 23, 2013 I would like to mention that I am not too good with networking hardware.I recently got a dual-band AC router (Asus RT-AC66U) and have been hearing some conflicting advice on how the dual-band works.First of all, if I take for example a Dual-Band N router with two 300Mbps bands. That means that you have two lanes that go up to 300Mbps, and they don't add up to 600Mbps right? I have heard it mentioned both ways, and I always assumed they don't add up the same way having two 1GHhz cpus would not add up to having a single 2Ghz CPU.Also, I was told that each band would have it's own SSID, but when I set up my router I only saw one SSID. I assumed it was automatic and the router manages which device goes on which band until I was told that I should be seeing two SSIDs instead of one (other than setting up WiFi security and assigning specific IPs to specific devices by network name I left it more or less on default settings, I am certain that the dual band option was enabled though).And finally, I was told that this is important because having a b or g device on a n band would slow the band down to b/g speeds. Is this true? Does that mean that when AC devices are common, and I connect an old b or g device to it, that it will slow the entire band down to below even n speeds? Or that all the n devices I have now will mean there was no point in getting an AC router unless I get rid of them all? (or stick them on their own band?). Link to comment Share on other sites More sharing options...
Roger H. Veteran Posted August 23, 2013 Veteran Share Posted August 23, 2013 To your first question the answer is yes - 2 x 300Mbps connections - 2 separate 300Mbps lanes. You can have 2 separate SSIDs per band or make them the same. To "see" the other SSID your device (phone, laptop, etc) need to have 5Ghz support (and the router be in a channel that the device can utilize. ie - some phones don't do the upper 5Ghz band, say channels higher than 50. Some will see 36-48 and 149-160 but don't see those middle channels). Connecting a B or G device on 2.4Ghz radios wont slow down the whole network, it might slow the 2.4Ghz N devices but not all the way down, also only when they are active as well. AC devices use 5Ghz so they wont be bothered by 2.4Ghz devices (B & G) which is one of the perks of simultaneous dual-band routers. It's technically 2 different networks even though they are connected. --------- Your B & G devices can hang out on 2.4Ghz all day, I doubt you even have B devices anymore. So if it's just G devices you'll be just fine when it comes to 2.4Gghz N devices. Keep your N devices that are capable of 5Ghz on those channels and you wont experience slow downs there. goretsky 1 Share Link to comment Share on other sites More sharing options...
+BudMan MVC Posted August 24, 2013 MVC Share Posted August 24, 2013 I would prob pull the B out of your statement about slowing down the network -- I am fairly sure that when a B is associated, not even active that there is quite a bit of overhead with making sure the B client doesn't transmit when the other G and N clients are talking and beacons and such. Because of this added overhead you have lower performance. Simple enough to test.. Even on a G router, test your throughput - then turn on B compatibility mode and just connect a client in B mode. Most any wireless card should be able be hard coded to only use B mode. A good test of this would be to set G/N only on your AP.. Run a iperf test, file copy timed, etc. Then change over AP to allow B to connect.. Run the tests again. Then actually associate a B client and run your tests again on your G or N client. Might have to do that this afternoon ;) goretsky 1 Share Link to comment Share on other sites More sharing options...
Recommended Posts