gw/nifragtest is a SAP Parameter attribute which is used to control enable ni fragmentation test information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
Tests fragmentation on the network layer. This parameter is used only
for troubleshooting, and should not be used without the agreement of
SAP.
0
Normal operation of gateway
>0
The gateway sends and reads fragmented data from the network.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.