To avoid this issue:
First upgrade the Sensor to a software version that supports TLS 1.2, then upgrade NSM to 10.1.7.50 or later.

View the tables below for the TLS 1.2 supported Sensor software.

If you’ve already performed the update, and have a communication issue:

1. Upgrade your Sensor to a TLS 1.2 supported Sensor software release.
2. Pair your Manager and Sensor

Upgrade paths for NS-series Sensor software versions:
 
NS9500 Sensor (Standalone):

TLS 1.0 supported Sensors	TLS 1.2 supported Sensors
9.2.5.50, 9.2.5.52, 9.2.5.88, 9.2.5.91	10.1.5.107

 
NS9500 Sensor (Stack):

TLS 1.0 supported Sensors	TLS 1.2 supported Sensors
9.2.5.88, 9.2.5.91	10.1.5.107

 
NS-series (NS9300, NS9200, NS9100, NS7300, NS7200, NS7100, NS5200, NS5100, NS3200, NS3100):

TLS 1.0 supported Sensors	TLS 1.2 supported Sensors
9.2.5.6, 9.2.5.25, 9.2.5.27, 9.2.5.72	9.2.5.190 or 10.1.5.106

 
 
NS7x50 Sensors (NS7350, NS7250, NS7150):

TLS 1.0 supported Sensors	TLS 1.2 supported Sensors
9.2.5.27, 9.2.5.72	9.2.5.190 or 10.1.5.107

 
NS3500 Sensor:

TLS 1.0 supported Sensors	TLS 1.2 supported Sensors
9.2.5.34	10.1.5.106

 
Upgrade paths for Virtual IPS Sensor software versions:

TLS 1.0 supported Sensors	TLS 1.2 supported Sensors
9.2.7.10, 9.2.7.26	9.2.7.65 or 10.1.7.86

 
Upgrade paths for M-series Sensor software versions:

TLS 1.0 supported Sensors	TLS 1.2 supported Sensors
9.1.3.4, 9.1.3.6, 9.1.3.9	9.1.3.19