This article provides clarifies how to be able to configure "# set system services extension-service request-response grpc grpc-keep-alive <interval-in-secs>" on Juniper Networks switches.

The customer need to configure "# set system services extension-service request-response grpc grpc-keep-alive <interval-in-secs>" but the stanza "grpc-keep-alive" does not exist while the switch is running on Junos version 20.2R2-S3.5.

It is a hidden config knob which can be configured to enable GRPC stack, cleaning up of sessions which are in hung state. Note that the range goes from 60 to 4294967295 seconds.

user@switch# set system services extension-service request-response grpc grpc-keep-alive <interval-in-secs>

The reason why you are unable to configure this command is because the stanza is not available in your Junos version 20.2R2-S3.5. The same seems to have been introduced in Junos versions 21 such as 21.4R3-S7.8. It has been tested on 20.2 and it did not work. Then the switch was upgraded to 21.4R3-S7.8, and the command is accepted.