default or selected kernelversion does not have config value CONFIG_DGRS.
Result is shown for kernelversion 5.4.123

Digi Intl. RightSwitch SE-X support

modulename: dgrs.ko

configname: CONFIG_DGRS

Linux Kernel Configuration
└─>Networking support
└─>Ethernet (10 or 100Mbit)
└─>Digi Intl. RightSwitch SE-X support
In linux kernel since version 2.6.12  
This is support for the Digi International RightSwitch series of
PCI/EISA Ethernet switch cards. These include the SE-4 and the SE-6
models. If you have a network card of this type, say Y and read the
Ethernet-HOWTO, available from
<>. More specific
information is contained in Documentation/networking/dgrs.txt.

To compile this driver as a module, choose M here and read
Documentation/networking/net-modules.txt. The module
will be called dgrs.

source code: