Hi Ben, i did some experiments today. 1. change the node C to AP mode (using same MAC), performance of A to B is good 2. keep node C as adhoc mode but chaneg the cell-id and ssid. performance is deteriorated I am just wondering if any packet of adhoc mode(beacon? probe request? probe response) will screw up wifi network?
Thanks, Jay 2015-10-27 1:47 GMT+08:00 Ben Greear <[email protected]>: > On 10/26/2015 10:38 AM, Yu-Chieh wrote: >> >> Hi Ben, >> I also geuss that mignt be BSSID mask issue, however i have no idea >> about the patten >> I can find bssid_mask function in ath5k and ath9k but not in ath10k. >> Do your suggest me to use XX:XX:XX:YY:YY:XX, XX should be same and YY >> could be different? > > > Please try something that works properly with the way ath9k does it's > mask and see if that fixes your problem in ath10k. > > Basically, if your NIC has an address: 00 11 22 33 44 55, then change the > 33 and/or 44 > octets when creating secondary vifs. This assumes you buy your NICs in > batches and the > low octet is likely unique. > > As long as you have a unique octet among all of your radios in the local RF > environment, then you should be fine. > > Somewhere there was once a security related document on how to screw up > wifi networks by setting a mask to purposefully cause troubles....you might > try to find that and see if it provides some more precise details on > the masking algorithm. > > Thanks, > Ben > >> >> Thanks. >> >> Jay >> >> 2015-10-26 23:12 GMT+08:00 Ben Greear <[email protected]>: >>> >>> Your probably have BSSID mask collision. Rule of thumb is to leave >>> all octets the same except the second and third (from the right) >>> byte. That usually gives you unique masks assuming the right-most >>> byte is unique for your radios. >>> >>> Thanks, >>> Ben >>> >>> >>> >>> On 10/26/2015 03:50 AM, Yu-Chieh wrote: >>>> >>>> >>>> Hi, >>>> >>>> I am working on IBSS mode by using ath10k. However i met some problem >>>> about the performance issue >>>> First of all, i set up two nodes, A (74:DA:38:19:19:DC) and B >>>> (74:DA:38:06:E1:96) and run iperf. >>>> i can get around 170 Mbps form A to B >>>> >>>> Then, i turn on the third node C(74:DA:38:06:E1:BE). >>>> The performance is deteriorated to around 30Mbps. >>>> If i turn off node C, the performance go back to 170 Mbps. >>>> >>>> At the same environment and same devices, i jsut change the mac of B >>>> to (74:DA:38:06:E1:B2) >>>> Everything is good. >>>> No matter node c is on or off, the performance always keep on 170Mbps. >>>> >>>> Anyone have any idea about this problem? >>>> >>>> Jay >>>> >>>> _______________________________________________ >>>> ath10k mailing list >>>> [email protected] >>>> http://lists.infradead.org/mailman/listinfo/ath10k >>>> >>> >>> -- >>> Ben Greear <[email protected]> >>> Candela Technologies Inc http://www.candelatech.com >> >> > > > -- > Ben Greear <[email protected]> > Candela Technologies Inc http://www.candelatech.com > _______________________________________________ ath10k mailing list [email protected] http://lists.infradead.org/mailman/listinfo/ath10k
