power channel data rate Excel sheet terms

[sshahul12]

Hello,

there is some Excel sheets for each wireless product named as power channel data rate table, here is a sample which is for C9115AXI series :

https://www.cisco.com/c/dam/en/us/td/docs/wireless/access_point/channels/reference/r17-6-x/9115axi-pwr-chn-17-6.xlsx

there is various columns in for each regulatory domain, named as this format:

[non] [HT or VHT or HE] [20 or 40 or 80 or 160] [ Beam Form or STBC]

does anyone knows a document declaring above terms? 

and second question, in a DFS test of C9115AXI-E  , radio doesn't detect radar on UNII-2 ( 5260 ) channel while at the same time it detect radar properly on 5500 frequency channel, is this something related to configuration? or it is a regulatory rule and no need for DFS on UNII-2 channels?

Thanks

Shahul  

[Rasika Nayanajith · Accepted solution]

[non] [HT or VHT or HE] [20 or 40 or 80 or 160] [ Beam Form or STBC]
does anyone knows a document declaring above terms? 

HT - 802.11n
VHT - 802.11ac
HE - 802.11ax

non [HT/VHT/HE] means AP operate legacy 802.11a (in 5GHz) or 802.11g (2.4GHz) where data rates limited to 6,9,12,18,24,36,48 & 54 Mbps. In that mode no channel bonding supported and no MCS data rates.

Regarding DFS test, it should support UNII-2 band as well, I would suggest to try with different firmware version (like 17.9.3.x  if you are using 9800)  & see same issue. Then reach out to TAC as it could be a defect/bug.

HTH
Rasika
*** Pls rate all useful responses ***

[sshahul12]

Hello Rasika,

thank you for your reply.

in that Excel sheet, it said "DFS channels are in Italic"

as i checked and you can see as well, for my case- channel 52 ( freq. 5260 ) numbers are NOT italic, while for channel 100 it is italic, so result of my test is correct - Cisco saying C9115AXI-E radio in dual antenna mode doesn't have DFS on UNII-1 and UNII-2 channels and have DFS on UNII-2Ext. only.

i had done same test few years ago on Cisco AIR-AP2802I-E and DFS test passed on both channels ( 52 and 100 ) , now i downloaded the Excel sheet for this radio and see yes, Cisco saying same, and DFS is on both UNII-2 and UNII-2Ext bands while again UNII-1 band doesn't have DFS. 

in HT160 also as i checked both radio  models doesn't have DFS - in this model whole UNII-1 and UNII02 bands are one single 160-Mhz channel

now after above story my question is why C9115 doesn't have DFS on UNII-2 band? this is something related to regulatory domain, and as we see, 2802 has DFS in that band while C9115 doesn;t have while both radio are in E region.

any idea? and do you have any solution to solve this issue? for example if i force radio to work on 40-Mhz channel size only, may it have different result on DFS?

thank you again and sorry for long story i told 

Shahul

[JPavonM]

I think this could be something related to wrong format in fonts.

I've colourized all Italics in that C9105 Excel and it shows some UNII-1 channel variations supporting DFS (under some 1-antenna and 3-antennas configs) when this is not an option in the standard, and some random UNII-2 channel variations not supporting DFS:

[sshahul12]

good day and thank you 

yes it is strange , as most of other modes of radio ( other columns in Excel sheet ) are in italic, so why for a radio it supports DFS on for example 40 and 80 Mhz channel size while it doesn't have DFS on HT20 mode!

and if 9115 radio is 802.11ax , will it work on HT20 mode?

if we suppose it is a typo mistake , why result of DFS test is fail, while on same radio and same time , just by changing channel from 52 to 100 , all DFS tests passed easily as expected!

 all strange and made me confused!

regards

Saeed.

[Gaybemiles]

Thanks for this interesting information!