Confusion on 2.4 and 5Ghz bands

Hi All,
So I just picked up the new TC with the 802.11ac. When I set it up, there was a checkbox in AE to create a seperate 5GHz network. I went ahead and checked it and now my network shows up twice, with one showing 5Ghz at the end of the name.
So what's a little confusing to me is that Apple's documentation shows the TC transmits at both frequencies, and no matter which band my devices use, they will automatically connect to the best available band. I have iphones, iPads and Macs (including the new Air) that are connecting to it.
So I guess my question is, which network (regular or 5Ghz should I be selecting on my wireless devices, and would it matter if it automatically switches between them?
Thanks

You don't have to even think about it. That's the whole point of the auto-switching aspect. Your Apple devices should select the optimal connection based on signal strength and quality from where they relative to the base.
The 5Ghz signal attentuates more rapidly as you move away from the base station, so up close, they should pick the 5Ghz, but as you increase the distance from the base, at some point they should switch to 2.4Ghz as the 5Ghz signal degrades.
However, by selecting separate networks, you've now interrupted the autoswitching, as the two networks are distincly named and identified. If you want the auto switching feature, then reset the TC to only enable a single network for both frequencies. You then just connect your devices to "the network SSID" and the devices will connect to whichever signal is best (or if they only support one frequency, they will just connect to that and stay that way).

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I have the same problem
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Trying to connect to BOTH 2.4GHz and 5GHz bands on WRT610N simultaneously!??!?

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Linksys WRT400N - Unable to Connect to 5GHz Band

Good Evening -
I am on my last nerve regarding my situation and I am hoping someone on this board can help me in some way, some form. My Linksys WRT400N router is not under warranty anymore so I can't receive any assistance through Linksys.
I have a Dell Vostro 3400 running Windows 7 Professional 64-bit. The wireless card in the Vostro is a DW1520 Wireless-N Half-Mini Card. This card can operate in the 2.4 GHz and 5 GHz band spectrum. Obviously, the Linksys WRT400N is a dual-band router and broadcasts in the 2.4 GHZ and 5GHz band simultaneously.
I originally had a DW1501 Wireless-N Half-Mini Card. Apparently, there was a known issue with this card with regards to connecting to a 5GHz frequency. With the DW1501 I was never able to connect to the 5GHz band ,,, the card would "see" the 5GHz band but it would never be able to connect to it. While on a support call with Dell wireless, they admitted that the DW1501 has an issue with actually connecting ("seeing") to a 5GHz band.
Dell offered to replace the DW1501 card with the DW1520. So, now my Dell Vostro has a DW1520 and it is able to "see" the 2.4GHz and the 5GHz bands. I am actually able to connect at 130 Mbps on the 2.4GHz band which is better than what I was connecting at ... which had been 65 Mbps. Now, the DW1520 card can also "see" the 5GHz band AND it can actually "connect" to the 5GHz band. When I "connect", I connect anywhere between 170 and 243Mbps, or thereabouts. So all is good until I actually open a browser and try and surf the net. When I do this, nothing happens ... it's like I am connected to the Internet but not really. So then I have to disconnect from the 5GHz and connect back the the 2.4 GHz band.
I spent nearly 2 hrs. on the phone this afternoon with another Dell technician trying to find out why I could connect to the 5GHz band but not actually surf the Internet via a browser. After 2hrs, the Dell technician could not find a resolution. However, we have possibly narrowed it down to the Linksys WRT400N router. At this point, I no idea what the issue is. The Dell technician said that I may have to re-install Windows 7 Pro 64-bit. I totally disagree. I have downloaded all recent DW1520 drivers and the Linksys WRT400N has the one and only firmware version. The Dell tech also recommended "resetting" the Linksys WRT400N. I have not done this yet ... but will.
So ... I don't know what else to do or where to turn. Is there a setting in my Linksys WRT400N router that I am not aware of that will allow me to connect to the 5GHz band? I have disabled my MacAfee firewall ... nothing. I have checked over everything I can think of ... I have researched the Internet for the optimal settings for the Linksys WRT400N. I have made those changes. Nothing. I don't have any IP address populated within the Wireless MAC filter settings within the Linksys WRT400N. I have done the ipconfig steps and have "refreshed" and "renewed" the ip addresses.
What leads me to believe that there is something not set correctly with my Linksys WRT400N (or maybe it's my AT&T Siemens modem that provides the gateway to the Internet) is that I am seeing the EXACT same issue that a state above with my Dell Precision M4400 Mobile Workstation laptop. That has a Intel WiFi 5300 ABGN network card in it. Same thing ... it actually connects to the 5GHz band, but I can't surf the net.
Finally, when I go to the Linksys WRT400N setup page and I go to Wireless > Wireless Basic Setup and change the Network Mode for the 5GHz band from Mixed to Wireless-A Only, I can actually connect to the 5GHz band but only at 54Mbps.
So, I am at a loss. I am not sure what to do, where to look or turn, nor what to or what not to configure. Any advice on optimal network settings or anything regarding this post would be greatly appreciated. This is like buying a nice sports car and not being able to get out of second gear. What's the use?
Thank you in advance.

Most likely the router. you said that 2 different laptops have the same EXACT problem. Try this (in order): Reflash the firmware, reset the router then reconfigure the wireless settings. Set the channel width and channels to AUTO.

Wifi connectivity - Yosemite and dual band routers (i.e. BT Home Hub)

This is working for me so far after all previous tips on other Discussions proved only to be temporary. This is the only one that enabled my MBP to accept password for the SSID.
From BT Home Hub - 2011!!
The BT Home Hub 4 and Hub 5 are dual band with two wireless frequencies for devices to connect to: 2.4GHz and 5GHz. On both Hubs, the default setting has the same network name (or SSID) for both the 2.4GHz and 5GHz bands. Connecting a typical 5GHz-capable device to this single SSID will automatically connect the device to both the 2.4 and 5Ghz frequency at the same time.
However, not all dual band devices behave the same way and some device software does not cope well with a single SSID for both frequencies.
As a result:
the device may not connect wirelessly to the Hub
it may not connect to 5GHz frequency even in the same room
the wireless connection might be intermittent
the wireless connection might be very slow
Devices where there are known to be problems include:
Some Apple devices including iPhone 5 and Apple TV
some Android smartphones
Xbox
For some devices you can solve this problem by having different network names (SSIDs) for the 2.4GHz and the 5GHz bands. To set this up, follow these steps:
Open your web browser on a device connected to the Hub and go to bthomehub.home. This will open the Hub Manager
Click on Advanced Settings and enter your Hub admin password when prompted. Unless you've changed it, you'll find the default Hub password on the Hub settings card
Click on Continue to Advanced Settings
Click on Wireless
Click on 5GHz
Change 'Sync with 2.4 Ghz' to No
Change the 'Wireless SSID' to a new name (we recommend just adding '5GHz' to the end of the existing SSID name so you'll know which one is which)
Click Apply to save the changes
After a few minutes you should see two BT Home Hub SSIDs in the list of networks on your device. All of your devices will still automatically connect to the original SSID name, which will be the 2.4GHz.
If you have existing dual band devices you want to connect to 5GHz only, you'll need to connect them to the 5GHz SSID that you've renamed. AND RESTART the hub - PJ
Note- Even though wireless speeds at 5GHz can be significantly faster than 2.4GHz, the range of a 5GHz connection is not as good. As a result, you may need your device closer to your Hub (than you'd need to when using the 2.4GHz SSID) to get the best performance possible."

Sadly it didn't last...
I just posted this on BT Home Hub users forum. and the big Yosemite/wifi Discussion
"Sorry to awaken this topic from the dead....
I am using HH5a, opted in to FON, and Os10.10 MacBookPro
I have no problem whatsoever connecting and staying connected to 2.4ghz
I struggle since OS10.10 to either connect or stay connected to 5ghz
A persistent issue with trying to connect to 5ghz is the response "invalid password" Only occasionally in the past 3 months has this not been a problem
the app WifiExplorer shows today that the only other networks on the same channels as my networks are the FON wifiX - both of which I presume are using my router/wifi as when I manually change channels these move with me.
Signal strength on 2.4 ghz is between 77 - 85, 5ghz 80+/- 1
Noise and signal noise ratio a lot higher on 2.4 than 5
(There is lots more info on wifi explorer but I dont know its relevance/meaning)
I have tried using manual channel selection and Smart Wireless and can't see much difference in 5ghz connection
Given a choice I would prefer to stay in FON but if there is overwhleming evidence that these hot spot networks are affecting mine, I would consider opting out. Views/ guidance please. Thanks. And a Happy New Year too."
IS ANYBODY ELSE using BT Home Hub5a having this same issue? I BELIEVE it has largely if only been since upgrading to 10.10.1 but can't swear to it.
IS IT SIGNIFICANT THAT SOMETIMES THE PASSWORD TO 5GHZ network is accepted and other times not?

How to see 5Ghz band using WRT610N and WUSB600N

I've installed the WRT610N router, and am connecting via WUSB600N adapter. I have only installed the driver for the adapter (not Linksys's LELA), and am using WinXP's "Wireless Network Connection" to connect. I've run into problems in the past with LELA causing errors, and I'd rather avoid using it.
The problem is that I cannot see the 5Ghz band. I can only see the 2.4Ghz band. What do I need to do in order to see (and hopefully connect to) the 5Ghz band? (I would hope that my not using LELA would be a non-factor. Theoretically, I should be able to use any brand of "N" adapter to connect with the larger band... Right?)

I have noticed that 5GHz channels on routers are sometimes set automatically far out at channel number 149 and thereabouts. I had a similar problem in that I knew I had a 5GHz band, but I couldn't even see it to try to connect. It appears that the Linksys utility which came with the WUSB600N cannot 'see' past about channel 50.
You may want to try setting the channel manually in the router to something like channel 38. The Linksys utility will definitely be able to 'see' it then, and should offer the ability to connect.

E8350 5GHZ Band and Macbook Pro

I saw another thread like this but really this should be brought to Linksys attention. The 5GHZ band is extremely slow with my Macbook Pro Retina (2012). It takes around 30 seconds to load any webpage if it loads at all. No other device has a problem and my macbook works with every other router at 5GHZ. The 2.4GHZ works fine. The strange thing is, the problem even happens when going straight to the router to make changes in the menu, not even outside the local network. It will take 30+ seconds to load any page in the router settings (sometimes it doesn't load at all). Oddly enough, it will load the login page instantly, anything other than that takes forever. The wifi networks aren't overlapping channels with each other, or my neighbors either. Any help would be appreciated.

ping www.yahoo.com: 64 bytes from 206.190.36.45: icmp_seq=0 ttl=51 time=51.218 ms64 bytes from 206.190.36.45: icmp_seq=1 ttl=51 time=52.501 ms64 bytes from 206.190.36.45: icmp_seq=2 ttl=51 time=54.525 ms64 bytes from 206.190.36.45: icmp_seq=3 ttl=51 time=53.394 ms64 bytes from 206.190.36.45: icmp_seq=4 ttl=51 time=54.045 ms ping 192.168.1.1: 64 bytes from 192.168.1.1: icmp_seq=0 ttl=64 time=5.090 ms64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=5.049 ms64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=5.051 ms64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=5.037 ms64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=2.599 ms64 bytes from 192.168.1.1: icmp_seq=5 ttl=64 time=403.588 ms64 bytes from 192.168.1.1: icmp_seq=6 ttl=64 time=5.093 ms64 bytes from 192.168.1.1: icmp_seq=7 ttl=64 time=2.620 ms64 bytes from 192.168.1.1: icmp_seq=8 ttl=64 time=2.573 ms64 bytes from 192.168.1.1: icmp_seq=9 ttl=64 time=4.886 ms64 bytes from 192.168.1.1: icmp_seq=10 ttl=64 time=4.870 ms64 bytes from 192.168.1.1: icmp_seq=11 ttl=64 time=66.202 ms64 bytes from 192.168.1.1: icmp_seq=12 ttl=64 time=5.349 ms64 bytes from 192.168.1.1: icmp_seq=13 ttl=64 time=5.136 ms64 bytes from 192.168.1.1: icmp_seq=14 ttl=64 time=5.199 ms64 bytes from 192.168.1.1: icmp_seq=15 ttl=64 time=2.441 ms64 bytes from 192.168.1.1: icmp_seq=16 ttl=64 time=5.079 ms64 bytes from 192.168.1.1: icmp_seq=17 ttl=64 time=4.876 ms64 bytes from 192.168.1.1: icmp_seq=18 ttl=64 time=2.521 ms64 bytes from 192.168.1.1: icmp_seq=19 ttl=64 time=176.117 ms traceroute www.yahoo.com: (5GHZ) -traceroute: Warning: www.yahoo.com has multiple addresses; using 206.190.36.105-traceroute to fd-fp3.wg1.b.yahoo.com (206.190.36.105), 64 hops max, 52 byte packets 1 192.168.1.1 (192.168.1.1) 5.144 ms 5.073 ms 2.451 ms 2 * * * 3 host-69-144-234-41.but-mt.client.bresnan.net (69.144.234.41) 13.573 ms 12.240 ms 8.995 ms 4 mslmt001dr5-xe-5-2-0-u0.int.bresnan.net (69.145.247.150) 14.613 ms 14.926 ms 27.741 ms 5 69.144.26.2 (69.144.26.2) 29.179 ms 30.772 ms 48.891 ms 6 lvtmt001cm1-ge-0-2.int.bresnan.net (72.175.110.76) 32.170 ms 29.580 ms 26.752 ms 7 38.104.126.53 (38.104.126.53) 34.154 ms 38.88.252.73 (38.88.252.73) 32.550 ms 38.104.126.53 (38.104.126.53) 33.458 ms 8 be2084.ccr22.sea01.atlas.cogentco.com (154.54.0.253) 33.531 ms 30.101 ms be2083.ccr21.sea01.atlas.cogentco.com (154.54.0.249) 29.549 ms 9 be2077.ccr22.sfo01.atlas.cogentco.com (154.54.0.241) 49.943 ms be2075.ccr21.sfo01.atlas.cogentco.com (154.54.0.233) 50.691 ms 50.415 ms10 be2016.ccr21.sjc04.atlas.cogentco.com (154.54.0.178) 51.753 ms be2015.ccr21.sjc04.atlas.cogentco.com (154.54.7.174) 49.873 ms 51.046 ms11 te0-0-2-0.agr11.sjc04.atlas.cogentco.com (154.54.0.98) 52.002 ms te0-0-2-0.agr12.sjc04.atlas.cogentco.com (154.54.2.62) 49.915 ms 50.915 ms12 yahoo.sjc04.atlas.cogentco.com (154.54.13.190) 58.853 ms 50.280 ms 154.54.14.58 (154.54.14.58) 56.712 ms13 ae-0.pat1.swp.yahoo.com (216.115.110.43) 49.315 ms 50.048 ms 47.520 ms14 216.115.101.109 (216.115.101.109) 52.928 ms 216.115.101.111 (216.115.101.111) 55.749 ms ae-5.pat2.gqb.yahoo.com (216.115.101.197) 56.669 ms15 66.196.67.1 (66.196.67.1) 53.154 ms 66.196.67.5 (66.196.67.5) 56.971 ms 66.196.67.3 (66.196.67.3) 55.908 ms16 98.137.31.133 (98.137.31.133) 55.514 ms unknown-67-195-1-x.yahoo.com (67.195.1.181) 57.360 ms 98.137.31.141 (98.137.31.141) 52.294 ms17 et-17-25.fab3-1-gdc.gq1.yahoo.com (67.195.1.83) 54.626 ms et-18-1.fab3-1-gdc.gq1.yahoo.com (67.195.1.81) 54.123 ms 98.137.31.186 (98.137.31.186) 54.904 ms18 po-11.bas1-7-prd.gq1.yahoo.com (206.190.32.17) 53.385 ms po-10.bas1-7-prd.gq1.yahoo.com (206.190.32.15) 55.489 ms 206.190.32.13 (206.190.32.13) 55.354 ms19 * * *20 * * * This whole process took about 5 minutes to complete. traceroute www.yahoo.com: (2.4GHZ) -traceroute: Warning: www.yahoo.com has multiple addresses; using 206.190.36.45-traceroute to fd-fp3.wg1.b.yahoo.com (206.190.36.45), 64 hops max, 52 byte packets 1 192.168.1.1 (192.168.1.1) 3.379 ms 1.040 ms 0.776 ms 2 * * * 3 host-69-144-234-41.but-mt.client.bresnan.net (69.144.234.41) 12.484 ms 20.470 ms 7.765 ms 4 mslmt001dr5-xe-5-2-0-u0.int.bresnan.net (69.145.247.150) 17.085 ms 18.684 ms 41.053 ms 5 seawafh2cr5-xe-3-3-0-u0.int.bresnan.net (69.144.26.2) 26.609 ms 26.746 ms 24.828 ms 6 lvtmt001cm1-ge-0-2.int.bresnan.net (72.175.110.76) 44.030 ms 28.533 ms 26.841 ms 7 te0-0-0-16.ccr21.sea02.atlas.cogentco.com (38.104.126.53) 28.844 ms 39.352 ms 38.88.252.73 (38.88.252.73) 28.130 ms 8 be2084.ccr22.sea01.atlas.cogentco.com (154.54.0.253) 31.601 ms be2083.ccr21.sea01.atlas.cogentco.com (154.54.0.249) 29.245 ms be2084.ccr22.sea01.atlas.cogentco.com (154.54.0.253) 31.962 ms 9 be2077.ccr22.sfo01.atlas.cogentco.com (154.54.0.241) 47.697 ms be2075.ccr21.sfo01.atlas.cogentco.com (154.54.0.233) 48.365 ms be2077.ccr22.sfo01.atlas.cogentco.com (154.54.0.241) 47.435 ms10 be2015.ccr21.sjc04.atlas.cogentco.com (154.54.7.174) 48.275 ms 50.377 ms 49.250 ms11 te0-0-2-0.agr11.sjc04.atlas.cogentco.com (154.54.0.98) 48.403 ms 49.199 ms 50.759 ms12 yahoo.sjc04.atlas.cogentco.com (154.54.14.58) 49.978 ms 47.774 ms yahoo.sjc04.atlas.cogentco.com (154.54.14.62) 47.646 ms13 ae-6.pat2.swp.yahoo.com (216.115.100.91) 50.326 ms 47.864 ms 50.907 ms14 ae-7.pat2.gqb.yahoo.com (216.115.101.109) 52.846 ms ae-7.pat1.gqb.yahoo.com (216.115.96.45) 69.071 ms ae-7.pat2.gqb.yahoo.com (216.115.101.109) 53.439 ms15 ae-1.msr2.gq1.yahoo.com (66.196.67.3) 54.056 ms 54.956 ms ae-1.msr1.gq1.yahoo.com (66.196.67.5) 75.433 ms16 xe-1-0-1.clr2-a-gdc.gq1.yahoo.com (98.137.31.133) 53.272 ms unknown-67-195-1-x.yahoo.com (67.195.1.185) 52.265 ms unknown-67-195-1-x.yahoo.com (67.195.1.181) 54.880 ms17 et-17-1.fab3-1-gdc.gq1.yahoo.com (98.137.31.172) 51.487 ms et-18-1.fab7-1-gdc.gq1.yahoo.com (67.195.1.245) 51.412 ms et-17-25.fab4-1-gdc.gq1.yahoo.com (67.195.1.87) 53.990 ms18 po-11.bas1-7-prd.gq1.yahoo.com (206.190.32.17) 71.616 ms po-9.bas1-7-prd.gq1.yahoo.com (206.190.32.13) 64.514 ms po-11.bas2-7-prd.gq1.yahoo.com (206.190.32.33) 50.988 ms19 * * *20 * * * This process took about 10 seconds to complete. netstat -rn: Routing tables Internet:Destination Gateway Flags Refs Use Netif Expiredefault 192.168.1.1 UGSc 67 67 en0127 127.0.0.1 UCS 0 0 lo0127.0.0.1 127.0.0.1 UH 1 26 lo0169.254 link#4 UCS 0 0 en0192.168.1 link#4 UCS 2 0 en0192.168.1.1/32 link#4 UCS 2 0 en0192.168.1.1 b4:75:e:c1:63:2b UHLWIir 69 143 en0 978192.168.1.122/32 link#4 UCS 0 0 en0192.168.1.255 ff:ff:ff:ff:ff:ff UHLWbI 0 2 en0 Internet6:Destination Gateway Flags Netif Expire::1 ::1 UHL lo0fd02:1a5b:2826::/64 link#4 UC en0fd02:1a5b:2826::167:d734:ee1b:422b c8:e0:eb:19:88:87 UHL lo0fd02:1a5b:2826::cae0:ebff:fe19:8887 c8:e0:eb:19:88:87 UHL lo0fe80::%lo0/64 fe80::1%lo0 UcI lo0fe80::1%lo0 link#1 UHLI lo0fe80::%en0/64 link#4 UCI en0fe80::b675:eff:fec1:632b%en0 b4:75:e:c1:63:2b UHLWIi en0fe80::cae0:ebff:fe19:8887%en0 c8:e0:eb:19:88:87 UHLI lo0fe80::%awdl0/64 link#8 UCI awdl0fe80::5c7b:65ff:fe51:6bf4%awdl0 5e:7b:65:51:6b:f4 UHLI lo0ff01::%lo0/32 ::1 UmCI lo0ff01::%en0/32 link#4 UmCI en0ff01::%awdl0/32 link#8 UmCI awdl0ff02::%lo0/32 ::1 UmCI lo0ff02::%en0/32 link#4 UmCI en0ff02::%awdl0/32 link#8 UmCI awdl0 [Process completed] I can make a video showing the differenence. It doesn't seem to show here but it happens...

Wrt610N please help ps3 remote play and also nothing sees the 5ghz band

I have finaly hooked everything up last night. I have everyything on mac filter and static IP address. Questions is though I would like to have my laptop D-link extreme N adapter and my ps3 on the 5ghz band. Can I do this... cause Im looking in the settings and it says Mixed,, N only, A only.... I thought it could do G also.... PLease explain there...I cant even get my laptop adapt to see the 5ghz band! Weird.... Also Im trying to get my ps3 on the best connection possible.. I would like to also have remote play through the net. Heres my problem... I enable it on the ps3 turn off the system.....and about 1 or 2 minutes it turns on by itself... IT does this quiete frequently... Again I have a wrt610N dual band wireless router. I thought I read somewhere if you change the broadcast channel it will help with the remote play..so I placed it on channel 11 and also placed the ps3 in the dmz... I am away from my home so I will try more out later...I woudl like to take the ps3 out of dmz if possible... I have unup enabled. THanks!!

Beside doing DMZ for your PS3, you better Open the Ports for your PS3 on your Linksys Router. TCP Ports: 10070 - 10080, UDP Ports: 50000 ,UDP Ports: 6000-7000, 10070. This will solve your Problem.

Can not see 5GHz band on my network

My HP 200 Quad all in one PC can not see the 5GHz band on my network. It works fine on the 2.4GHz band and I have another PC on the network that is able to see the 5GHz band. My wireless card is a Ralink and according to its properties it should operate on the 5GHz band on channels36-161. HP Tech support wants to charge me to fix this and the unit is 3 weeks old and was like this right out of the box, not to mention my 2 year warrnty. Can anyone help?
Freddy

FWV wrote: hanspuppa, My wireless card is a Ralink Technology device and it does have blue tooth. To the best of my knowledge this card is capable of receiving the 5 GHz signal but it does not. When I check the wireless device properties it list the 5 GHz band to operate through channels 36-161 and also states the device is working
properly. The last I checked my router it was broadcasting on channel 36, so everything seems to be fine but I can not receive the signal.
Hello FWV, Sorry for the confusion. I was under the impression that you could not connect at 5 ghz. Now you suggest you cannot connect at all.
Can you advise if the Ralink can connect to the wireless router at the 2.4 ghz frequency, or not connect at all?
Can you advise if you can see the router on the network at the 2.4 ghz.?
Many times, you may need to reboot the router to allow it to recognize new connections.
Just not sure of what is going on. Maybe some other Member can be of more help.
Please click the White Kudos star on the left, to say thanks.
Please mark Accept As Solution if it solves your problem.

AppleTV "sees" 2.5Ghz band but not 5Ghz band.

I have a new DualBand Extreme that I purchased mainly to give my AppleTV the full "whammy" of "N" bandwidth. The ATV is located in the bedroom of a very small house, but does not see the 5Ghz band, even though it connects easily with the 2.5Mhz band and shows a full strength connection. I am a bit confused because I thought the 5Mhz had the greater range. (When I move the ATV closer to to the DB Extreme, it does pick up the 5Mhz band...). FYI.. the 5GHZ has a separate name so I know if I am on the dedicated "N" network or not.
I realize it is making an "N" connection on the 2.5Ghz band, and in the absence of a/b/g devices on the network is probably doing as well as the 5Ghz band would, but... does anybody have any ideas on why I get the 2.5 but not the 5?

5 GHz signals do not travel through objects as well as 2.4 GHz signals do. Therefore in many situations the 5 GHz signal does not reach as far.

After upgrading to Mountain Lion, I cannot connect to my Airport Extreme on the 5GHz band (2.4GHz works fine)...what's going on?

I have been having intermittent/no wireless success on the 5GHz band of my Airport Extreme. I'm on an iMac early 2008. It was working fine before upgrading to Mountain Lion. I have tried many things (deleting the wireless network, readding it, changing settings on the AirPort Extreme, deleting the 5GHz network on that and readding it, running diagnostics) but nothing has fixed it. I can switch to the 2.4GHz band and it works flawlessly. This must be a software problem since it only started happening when I upgraded the OS.
Any help would be appreciated. Thanks!

No it isn't, I have tried 4 different mountain lion machines connected to a 5Ghz and it works just fine. It is with your machine hence we need to fix it
create a new location and see if that fixes your issue, If not trash Macintosh HD/Library/System Configuration
That is a folder so trash it > restart the computer > create a new location

WRT1900AC - WiFi on 5GHz band *RANDOM REBOOTS*

I've noticed that this router is totally unstable (random reboots) on 5GHz band.
I'm using Lenovo ThinkPad T440p with build-in Intel(R) Dual Band Wireless-AC 7260 and it's unusable on 5GHz band using Mixed mode. I've setup to N-Only but it doesn't help, router reboots randomly while i'm surffing web.
Now i'm only using 2.4GHz band so router doesn't reboot at random.
Linksys please fix this issues!!!! this shouldn't happen on 300$ router!!!!
I'm running lastest 1.1.8.161917 FW

Was a Factory Reset performed before and after any firmware updates then set up from scratch?
Was the router working before any firmware updates?
Internet Service Provider and Modem Configurations
What ISP Service do you have? Cable or DSL?
What ISP Modem Mfr. and model # do you have?
What wireless modes are you using?
2.4Ghz and 5Ghz routers: Try single mode N or mixed G and N on 2.4Ghz and single mode N or Mixed on 5Ghz?
Channel Width set for Auto 20/40Mhz or try 20Mhz only.
Try setting a manual Channel to a open or unused channel. 1, 6 or 11. 11 for single mode N if the channel is clear. 13 for EU regions. Try channel 48 or 149 on 5Ghz. http://en.wikipedia.org/wiki/List_of_WLAN_channels
http://kb.linksys.com/Linksys/ukp.aspx?vw=1&docid=f2625b15a5d7454b8e7fafbe65d5aa63_4009.xml&pid=80&r...
What security mode are you using? Preferred security is WPA-Personal. WPA2 Only. http://kb.linksys.com/Linksys/ukp.aspx?vw=1&docid=8ce9e83bd3784001aee72da7f1ef48e8_Changing_the_basi...
http://kb.linksys.com/Linksys/ukp.aspx?pid=80&vw=1&articleid=19073
Ensure any devices with WiFi adapter drivers are updated.
Any 2.4Ghz or 5Ghz cordless house phones or WiFi APs near by?
Any other WiFi routers in the area? Link> Use http://www.metageek.net/support/metageek-software-archives/ to find out. Use v3. How many?
WMM Support must be enabled for single wireless N mode to function.
http://kb.linksys.com/Linksys/ukp.aspx?vw=1&articleid=5471
Router Placement
Forum User - "Well I feel really dumb. After moving the router away from other electronic devices my speeds are back to normal. Just a heads up for anyone experiencing slow speeds, you might want to move it away from other electronics and see if that helps."
3-6' feet minimum safe distance between devices.
Placement on main level floor and central in the building and WELL ventilated is preferred. Not in basements or closets as building materials, or near by electronics devices could interfere or hinder good signal propagation.
I've been using Mixed Mode on 5Ghz with my router and haven't had any issues. Possible envrionment or configuration issue or incompatibility issue with the ThinkPad....Please give feedback on question presented...lets see if we can find the problem.

Does the iPhone 4S support the 5GHz band?

While the iPhone 4 supported 803.11(n), it did so only on the 2.4GHz band. I can't find any information about this for the 4S. Does anyone know if it supports the 5Ghz band?
Sorry....I asked too quickly. The answer is NO. See http://www.apple.com/iphone/specs.html
Message was edited by: Robert Camner

stevenfromwaterdown wrote:
I wan't to use my 5ghz wifi on my iPhone 4S but it can't see the SSID for my 5ghz network. The specs page for the iPhone 4S states it uses:
802.11a/b/g/n Wi-Fi (802.11n 2.4GHz and 5GHz).
No, it does not state that.
The 4S does not have the 5GHz radio.
http://www.apple.com/iphone/compare-iphones/

Virgin Superhub settings to allow Airport Extreme to broadcast at 2.4 and 5Ghz

I have a 120Mb Virgin Superhub (SH) installed in my home but its wireless performance is terrible. The SH router can work in wireless or modem mode at 2.4Ghz or 5Ghz but not simultaneously. I'm therefore going to place my SH in modem mode and connect up my Airport Extreme which can broadcast at 2.4 and 5Ghz simultaneously which will allow me to use all my tech at their best frequencies.
My query is what do I set my SH to? 2.4Ghz or 5Ghz to enable my Airport Express to broadcast both frequencies. Hope you can help.

Hi - if you configure the SH to be just a modem then all it should be doing is providing internet to the Extreme - the Extreme can be used with almost any cable or DSL modem without having to touch the modem so 2.4Ghz or 5Ghz would have nothing to do with the dual band capabilities of the Extreme - I would check with the SH manufacturer or ISP to make sure that this is the case - since you already have the Extreme, it won't hurt to try it.

Could wifi with a university network drop often because of a 5ghz band connection?

Hey guys,
I've been having wifi issues at my school/work (same location) with the connection dropping randomly. It seems to happen several times an hour. I purchased a MBA months ago and had no problems with wifi connectivity till recently. My school has acquired a new access point in the facility. It was right around the release of Mavericks. So now I've become unclear on whether it's the network or the new OS. Anyways, the network is WPA 2 enterprise with dual-band connectivity. This past week I have done my fair share of studying on dual-band technology and now understand perks and downfalls to 2.4ghz versus 5ghz bands. That reading was due to a connection issue at home. However, today I finally realized that I was connected to the 5ghz band at work/school by using the option key and clicking the wifi icon. After browsing through several forums, I was still unsure if A) the 5ghz band was responsible for wifi dropping, and B) Whether or not I could disable the wifi from defaulting to the 5ghz and use 2.4ghz as a solution instead.
Since I could not find answers to those two questions I have tried the following...
I changed the MTU to "1453" since it's the so-called "magic number" for mac's. And yes, so far it is the magic number because the wifi has not dropped once since applying it. I'm still standing by, convinced it will drop. Wireless diagnostics is currently monitoring if it does. Typically I use the ethernet adapter so I don't have to worry about any of this. That's a fix, but not the one I'm looking for. It's flat out annoying! I know I can try renewing the DHCP lease as well. I haven't done it yet because I'm seeing if the MTU was the sole source of the problem. I've already performed basic troubleshooting and like usual it didn't solve anything. That's not to say that restarting doesn't cover a higher percentage of issues!
Honestly the MTU change could be the end of my problems, but I'd still like some insight on my two questions in the first paragraph. Any guidance is strongly appreciated. I've been loving my mac and the community since I made the switch not too long ago. I'm just still familiarizing myself with everything. Thanks in advance for any help!

That's correct.
When it's unable to obtain an IP address from a DHCP server, machines are supposed to self-assign themselves an address from the 169.254.x.x range.
This is so that you can, for example, connect two machines with an Ethernet cable or via Wi-Fi without the need for a DHCP server and the two machines will be able to talk to each other.
(If you care, you can read the technical details here.)
So the big question here is why your machine is failing to obtain an address via DHCP, and it sounds like an issue with the DHCP servers on your network.
If you want to read more than you probably would ever want to know about how one campus is dealing with similar issues, you can here.)

Confusion on 2.4 and 5Ghz bands

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