tag:blogger.com,1999:blog-1988432060681510848.comments2024-02-17T13:07:10.285-06:00Revolution Wi-FiAndrew von Nagyhttp://www.blogger.com/profile/12658799453646609565noreply@blogger.comBlogger988125tag:blogger.com,1999:blog-1988432060681510848.post-82947555065292797242016-08-18T08:45:58.926-05:002016-08-18T08:45:58.926-05:00Wildcard certificates are the same. They need to b...Wildcard certificates are the same. They need to be in PEM format. You might need to convert them. Andrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-28511078868635392792016-08-17T23:36:13.685-05:002016-08-17T23:36:13.685-05:00Hello what if you have an SSL Wildcard certificate...Hello what if you have an SSL Wildcard certificate? Do you need to do the same or you can just directly load it to the WLC in .pem format?Anonymoushttps://www.blogger.com/profile/15468996967990211853noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-69409257268283218732016-02-05T11:33:13.972-06:002016-02-05T11:33:13.972-06:00Hi Joey,
You can implement a Guest SSID in a few ...Hi Joey, <br />You can implement a Guest SSID in a few different ways. The simplest would be a separate guest VLAN on your local network on the 3850s and any upstream router/firewall. You would configure the Guest WLAN to assign clients into the guest VLAN and have the layer 3 gateway or firewall filter traffic through an access control list (ACL) to prevent internal access.<br /><br />Second, you could use auto anchor mobility and tunnel guest traffic into a remote DMZ network segment that is attached to a separate anchor controller (e.g. a Cisco 2504, 5508, 5520, 5760, etc.). You would configure the local controllers and anchor controller in a mobility group and configure the WLAN to forward all traffic to the anchor controller in the DMZ. This would be done by the 3850 sending the traffic inside a CAPWAP mobility tunnel to the anchor controller. The APs wouldn't communicate directly with the anchor controller. You can see which controller you may need as an anchor controller based on your size/scale requirements here:<br /><a href="http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/107458-wga-faq.html#qa2" rel="nofollow">http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/107458-wga-faq.html#qa2</a><br /><br />Cheers,<br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-64633184701649540132016-02-03T04:30:41.602-06:002016-02-03T04:30:41.602-06:00Hello,
What would you recommend me setting up for...Hello,<br /><br />What would you recommend me setting up for a small office with 2-3850 switches with the mobility license and 2-3702's ap. WE just purchaed the controller mobility license for the switch. We would like to have one corporate SSID and Guest. The guest i'm confused about, so if i wanted to purchase an anchor controller to separate it out... How would the guest anchor talk to the AP's? The AP's will be connected to the 3850 and obviously used for the corporate wifi, but how would the guest anchor controller talk to the aps? Anonymoushttps://www.blogger.com/profile/11207980832122071571noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-24730115671002132362014-12-17T14:47:23.420-06:002014-12-17T14:47:23.420-06:00Hi Kenny,
The SNR is based on the noise floor. The...Hi Kenny,<br />The SNR is based on the noise floor. There can be many contributing variables such as the thermal noise floor (based on the channel width), noise from indistinguishable Wi-Fi frames (e.g. on an adjacent channel), and non-Wi-Fi noise (e.g. microwaves). The radio circuitry in the receiver also plays a part in regards to receiver sensitivity.<br /><br />Regarding the channel width, the noise floor will go up by 3dB for every doubling of channel width.<br /><br />Regarding modulation scheme, SNR impacts what modulation can be used since it has to reliably recover the encoded data. It's not the other way around (modulation type doesn't affect SNR). 256-QAM is already very tough to reliably decode and requires a very high SNR (approx. 30-35 dB SNR depending on channel width).<br /><br />Cheers,<br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-62583056991735025222014-12-17T12:19:46.650-06:002014-12-17T12:19:46.650-06:00Hey Andrew,
What contributes more to SNR, wider ...Hey Andrew, <br /><br />What contributes more to SNR, wider BW or modulation scheme(64 qam to 256 qam). Also if one day we see 1024QAM, would it be almost impossible to send at an 80MHz channel due to SNR?<br />thanks, Love the blog!Anonymoushttps://www.blogger.com/profile/08918130068649390188noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-63942271944197563472014-12-13T23:56:40.650-06:002014-12-13T23:56:40.650-06:00(Cisco Controller) >show ap auto-rf 802.11b [AP...(Cisco Controller) >show ap auto-rf 802.11b [AP-name]<br />Number Of Slots.................................. 2 <br />AP Name.......................................... [AP-name]<br />MAC Address...................................... [AP-Mac]<br /> Slot ID........................................ 0<br /> Radio Type..................................... RADIO_TYPE_80211b/g<br /> Sub-band Type.................................. All<br /> Noise Information<br /> Noise Profile................................ PASSED<br /> Channel 1.................................... -91 dBm<br /> Channel 2.................................... -80 dBm<br /> Channel 3.................................... -87 dBm<br /> Channel 4.................................... -85 dBm<br /> Channel 5.................................... -79 dBm<br /> Channel 6.................................... -91 dBm<br /> Channel 7.................................... -84 dBm<br /> Channel 8.................................... -89 dBm<br /> Channel 9.................................... -86 dBm<br /> Channel 10................................... -83 dBm<br /> Channel 11................................... -95 dBm<br /> Channel 12................................... -93 dBm<br /> Channel 13................................... -85 dBm<br /><br />--More-- or (q)uit Threshold...................... 2346<br /><br /> Interference Information<br /> Interference Profile......................... PASSED<br /> Channel 1.................................... -128 dBm @ 0 % busy<br /> Channel 2.................................... -128 dBm @ 0 % busy<br /> Channel 3.................................... -128 dBm @ 0 % busy<br /> Channel 4.................................... -128 dBm @ 0 % busy<br /> Channel 5.................................... -128 dBm @ 0 % busy<br /> Channel 6.................................... -128 dBm @ 0 % busy<br /> Channel 7.................................... -128 dBm @ 0 % busy<br /> Channel 8.................................... -128 dBm @ 0 % busy<br /> Channel 9.................................... -128 dBm @ 0 % busy<br /> Channel 10................................... -128 dBm @ 0 % busy<br /> Channel 11................................... -128 dBm @ 0 % busy<br /> Channel 12................................... -128 dBm @ 0 % busy<br /> Channel 13................................... -128 dBm @ 0 % busy<br /> Load Information<br /> Load Profile................................. PASSED<br /> Receive Utilization.......................... 0 %<br /> Transmit Utilization......................... 1 %<br /> Channel Utilization.......................... 72 %<br /> Attached Clients............................. 0 clients<br /> Coverage Information<br /> Coverage Profile............................. PASSED<br /><br />--More-- or (q)uit<br /> Failed Clients............................... 0 clients<br /> Client Signal Strengths<br /> RSSI -100 dbm................................ 0 clients<br /> RSSI -92 dbm................................ 0 clients<br /> RSSI -84 dbm................................ 0 clients<br /> RSSI -76 dbm................................ 0 clients<br /> RSSI -68 dbm................................ 0 clients<br /> RSSI -60 dbm................................ 0 clients<br /> RSSI -52 dbm................................ 0 clients<br /> Client Signal To Noise Ratios<br /> SNR 0 dB.................................. 0 clients<br /> SNR 5 dB.................................. 0 clients<br /> SNR 10 dB.................................. 0 clients<br /> SNR 15 dB.................................. 0 clients<br /> SNR 20 dB.................................. 0 clients<br /> SNR 25 dB.................................. 0 clients<br /> SNR 30 dB.................................. 0 clients<br /> SNR 35 dB.................................. 0 clients<br /> SNR 40 dB.................................. 0 clients<br /> SNR 45 dB.................................. 0 clients<br /> Nearby APs<br /> [AP1 -name]slot 0.................. -89 dBm on 6 [AP1-IP]<br /> [AP2 -name]slot 0.................. -87 dBm on 6 [AP2-IP]<br />.<br />.<br />.<br />.<br /> <br />Anonymoushttps://www.blogger.com/profile/03382494894351655786noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-24956234852763582792014-12-13T23:55:24.923-06:002014-12-13T23:55:24.923-06:00Dear Jason,
You just need to enter 'show ap ...Dear Jason, <br /><br />You just need to enter 'show ap auto-rf [ap name]' on the Cisco WLC. If will list useful rf-info along with the channel utilization percentage<br /><br />Thanks, <br />AdnanAnonymoushttps://www.blogger.com/profile/03382494894351655786noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-86157417422020648862014-11-27T21:30:02.095-06:002014-11-27T21:30:02.095-06:00Thank you for this...very helpfulThank you for this...very helpfulDaniel Khttps://www.blogger.com/profile/03270822776056647632noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-63503854938570340272014-11-22T19:31:35.308-06:002014-11-22T19:31:35.308-06:00As additional channels are approved by the FCC wha...As additional channels are approved by the FCC what is required to make the channels available to WLAN equipment? Do new chipsets have to be released or can firmware updates allow the use of the channels?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-25501585979722377962014-11-09T19:08:33.515-06:002014-11-09T19:08:33.515-06:00An idle access point still sends beacon frames to ...An idle access point still sends beacon frames to advertise the network. This occurs whether the SSID is 'hidden' or not (that just strips the name out of the beacon, but it is still sent). The beacon is sent at the minimum Basic data rate which plays a large factor into how much overhead is consumed (percentage of airtime that is 'busy'). Co-channel interference also plays a large part because any AP that is sending beacons on the same channel within range of your AP or clients causes your devices to backoff (medium is busy).<br /><br />Cheers,<br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-27066341393123904802014-11-09T17:26:37.254-06:002014-11-09T17:26:37.254-06:00Could you explain why an if/why idle access point ...Could you explain why an if/why idle access point would cause overhead? (for example, a Linksys router that no one is connected to).<br /><br />You stated that all access points (incl. neighbors) contribute to overhead on a channel. What about SSIDs of other networks? How do they consume airtime? (for instance, if you're in a building with 15 non-aerohive SSIDs, but not much traffic).<br /><br />I'm trying to wrap my head around how idle 3rd party devices can add so much overhead. Perhaps I don't understand the word "overhead". According to this table, if there are 6 third party access points on the same channel, with 6 SSIDs, there is 100% overhead, does this mean there is 0% airtime left over?dav_phttps://www.blogger.com/profile/09324282892655690007noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-80290577362269995282014-10-22T15:44:42.868-05:002014-10-22T15:44:42.868-05:00I know it's been awhile for this post, but we&...I know it's been awhile for this post, but we've been going crazy with this particular problem. In addition to the iPhone sending a bogus 10000 microsecond CTS-to-Self, the iPhone won't actually ACK any packets for almost 40ms after this is sent. The huge kicker is that the phone won't pass the packet to an app for nearly 400ms! That's a killer.<br /><br />We are the developers of a low-latency audio app that streams over UDP, and this is causing a huge mess for us.<br /><br />I'd love to know if anybody's found out anything more about it. We've filed a bug report with Apple, but who knows how long that will take to resolve.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-58642999606894476702014-10-17T00:04:04.765-05:002014-10-17T00:04:04.765-05:00In a scenario where I do not mind a little bit of ...In a scenario where I do not mind a little bit of co-channel interference do you recommend assigning static 80Mhz channels? Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-17437765239408359322014-10-16T10:27:53.484-05:002014-10-16T10:27:53.484-05:00Hi Koen,
That is a coloring typo. Thanks for point...Hi Koen,<br />That is a coloring typo. Thanks for pointing it out, I'll get it updated. The color shading is used to indicate the different encoding ratios used with the same modulation type (e.g. 1/2 versus 2/3 ratios).<br /><br />Thanks,<br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-8410129579833271512014-10-16T10:25:58.856-05:002014-10-16T10:25:58.856-05:00Hi Koen,
I'm not sure what that is. I've n...Hi Koen,<br />I'm not sure what that is. I've never paid much attention to it but now I'm curious. Perhaps the MetaGeek guys know?<br /><br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-47363422251730938922014-10-16T09:22:45.937-05:002014-10-16T09:22:45.937-05:00Hey Andrew,
Great post. Any idea what the cause i...Hey Andrew,<br /><br />Great post. Any idea what the cause is of the blue vertical lines in the spectrum analyzer?<br />I also see these a lot assesing the 5GHz spectrum bands. Also using Chanalyzer.<br />Anonymoushttps://www.blogger.com/profile/13196154645974704305noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-52821179318272036152014-10-16T08:31:17.489-05:002014-10-16T08:31:17.489-05:00Hey Andrew,
What is the meaning of the difference...Hey Andrew,<br /><br />What is the meaning of the difference in color (lighter/darker) for the same MCS rate? <br />ex. 29dB, MCS = 8 (color is light green)<br /> 30dB, MCS = 8 (color is dark green)<br /><br />Best Regards,<br />KoenAnonymoushttps://www.blogger.com/profile/13196154645974704305noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-57531046012319090412014-10-12T10:50:55.103-05:002014-10-12T10:50:55.103-05:00is there any open source WLC s to download???is there any open source WLC s to download???Anonymoushttps://www.blogger.com/profile/09611622196248071110noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-12747647102588040862014-10-10T08:06:33.049-05:002014-10-10T08:06:33.049-05:00Hi Martin,
The FCC banned use of the 5600-5650 MHz...Hi Martin,<br />The FCC banned use of the 5600-5650 MHz range in 2010:<br /><a href="http://transition.fcc.gov/eb/uniitdwr.pdf" rel="nofollow">http://transition.fcc.gov/eb/uniitdwr.pdf</a><br /><br />They have since allowed its use again in 2014:<br /><a href="http://www.revolutionwifi.net/2014/04/impact-of-fcc-5-ghz-u-nii-report-order.html" rel="nofollow">http://www.revolutionwifi.net/2014/04/impact-of-fcc-5-ghz-u-nii-report-order.html</a><br /><br />Cheers,<br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-54474731019761315272014-10-09T08:45:56.575-05:002014-10-09T08:45:56.575-05:00Hi Jeremy,
For 802.11n the MCS numbers were 0 thro...Hi Jeremy,<br />For 802.11n the MCS numbers were 0 through 31, with 8 MCS rates defined for each spatial stream 1-4. So you had MCS 0-7 for 1SS, MCS 8-15 for 2SS, MCS 16-23 for 3SS, and MCS 24-31 for 4SS. However, with 802.11ac that changed and there are only MCS 0-9 now and they numbering is the same no matter how many spatial streams are being used. The MCS really describes the modulation type (BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM) and the encoding ratio (the number of bits used for data versus error correction). Essentially, the older method used by 802.11n was redundant since every MCS above 7 was simply the same as the lower MCS rates just numbered higher to account for the number of spatial streams.<br /><br />Hope this helps.<br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-41660694589136763002014-10-06T10:41:56.951-05:002014-10-06T10:41:56.951-05:00I'm confused on the MCS value in the chart, do...I'm confused on the MCS value in the chart, doesn't MCS go up to 32?Anonymoushttps://www.blogger.com/profile/01682851002394030815noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-55168061217047199462014-10-06T08:32:23.590-05:002014-10-06T08:32:23.590-05:00You need to convert bytes to bitsYou need to convert bytes to bitsAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-85298781912175604382014-09-30T16:18:55.186-05:002014-09-30T16:18:55.186-05:00First Row First column=3.22%? how,, can you please...First Row First column=3.22%? how,, can you please explain? I did following calculations:<br /><br />Frame Size =380 bytes<br />100msec every frame=10 frames a second<br />overheads= (Frame size*no of Frames)/Data Rate=(380*10)/1000000=0.0038= 0.38%<br /><br />Anonymoushttps://www.blogger.com/profile/02508275968338798005noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-12071285762986211672014-09-10T05:40:42.200-05:002014-09-10T05:40:42.200-05:00on the subject of ACI, I came across Ubiquiti'...on the subject of ACI, I came across Ubiquiti's blurb for AirPrism today, claiming to zap up to 30dB of ACI. I'm a bit sceptical (of marketing, by default) , but if it works in practice this feature would definitely be an advantage when deploying wide channels.Anonymoushttps://www.blogger.com/profile/09781002536512067265noreply@blogger.com