Data Packets could not received due to low RSSI on 9130AXE and 9130AXI

[brian zhang1]

WLC 3504:8.10.151.0

AP C9130AXE-H, External antenna for AXE(enable port A+B): AIR-CAB002-D8-R=  + 2*AIR-ANT2524DW-R 

And AP C9130AXI-H(Enable All ports)

From the client side, RSSI is very strong(-20dBm), but the data packets send from Cisco AP is very low：

AXI：data packet -48dBm, Beacon -19dBm

AXE:data packet -63dBm,Beacon -25dBm

The result is, from the client, RSSI is very strong, but when moving client away from AP, even RSSI is still very strong from the display, because the TX power of data packets is so poor, client is not able to receive data packets. this can be easily obervered as well in air sniffer. and client roaming is not able to trigger due to RSSI is still strong(from Beacon)

The measurement was done by close the client with antenna and air sniffer.

How can we increase the TX power for data packets?(disable 11ax to use 11a see same issue)

This is a serious issue to deploy this serial APs to warehouse etc.

[Rich R]

Thanks Brian - can you share the bug id for reference?

[patoberli]

Might be CSCvx37875, which is fixed in beta 8.10.158.60, but I hope Brian can confirm this.

[brian zhang1]

Looks like the scenario is match, but TAC told me not this one, will provide once get confirmed

[saravlak]

are the issue seen on both 2.4 and 5g bands.

if 5G, are all bands or specific band/channels impacted -like what's the impacted condition

let know if you've that detail. thanks.

[brian zhang1]

All channels on 5G only as I recall, thanks.

[brian zhang1]

yes, confirmed , bug id CSCvx37875,