GNSS

GNSS

With Release 26.1.1, two GNSS enhancements are available: an option to enable or disable GNSS from the controller, and improved output for the show gnss info command, offering more detailed runtime status and diagnostics.

Disable GNSS

From release 26.1.1, you can dynamically disable the GNSS service on a specific access point. This capability is especially useful when weak satellite signals could cause an AP to report inaccurate coordinates. By disabling GNSS in such cases, you can prevent incorrect location data from affecting the system and ensure the AP uses an alternative location source.

Use this procedure on the controller to disable the GNSS service.

Procedure

Use the ap name ap-name geolocation gnss shutdown command to specify the AP and disable the GNSS service on that AP.

Example:

Device# ap name AP-BLR-01 geolocation gnss shutdown

The configuration persists across AP reboots.

Enable GNSS

Use this procedure on the controller to enable the GNSS service.

Procedure

Use the ap name ap-name no geolocation gnss shutdown command to specify the AP and enable the GNSS service on that AP.

Example:

Device# ap name AP-BLR-01 no geolocation gnss shutdown

Check the status of the GNSS module

Starting with release 26.1.1, you can set the state of the GNSS module to administratively down. Use this procedure on the AP to check the status of the GNSS module.

Procedure

Use the show gnss info command to view the status of the GNSS module.

Example:

Device# show gnss info

GNSS State Down

GNSS status and diagnostics

The updated show gnss info command now includes more detailed runtime GNSS status and diagnostics including satellite distribution, signal quality, number of satellites, location, uncertainty ellipse and more.

A sample output is provided.

AP# show gnss info

GnssState: Started
ExternalAntenna: true
Fix: 3D-Fix ValidFix: true Time: 2022-01-01 00:01:01
Latitude: 37.4080 Longitude: -121.9530
HorAcc: 0 hDOP: 0.84
Uncertainty Ellipse:
 Major axis: 0 Minor axis: 0 Orientation: 0
Altitude MSL: 176.4 HAE: 0 VertAcc: 0
NumSat: 10
pDOP: 1.75 hDOP: 0.84 vDOP: 1.54 nDOP: 99.99 eDOP: 99.99 gDOP: 99.99 tDOP: 99.99
LastFixTime: 2022-01-01 00:01:00
SatelliteCount: 4

Const.    SatId CNO   Elev. Azim.
GPS       1     47    28    110
GPS       7     44    55    127
GPS       8     45    19    44
GPS       9     42    3     175

GNSS_PostProcessor:
Latitude: 37.4080 Longitude: -121.9530
HorAcc: 32.413618 hDOP: 18.628516
Uncertainty Ellipse:
 Major axis: 44.269861 Minor axis: 10.924539 Orientation: 141.70748
Altitude MSL: 360.78333 HAE: 0 VertAcc: 0

CiscoGNSS: N/A

Last Location Acquired:
Latitude: 37.4080 Longitude: -121.9530
HorAcc: 3.6618832 hDOP: 2.1045306
Uncertainty Ellipse:
 Major axis: 5.151356 Minor axis: 0.00035979961 Orientation: 146.63993
Altitude MSL: 310.9 HAE: 0 VertAcc: 0
Derivation Type: GNSS_PostProcessor
Time: 2025-10-05 01:28:46