Distributed Switch Architecture support

modulename: dsa_core.ko

and/or

dsa.ko

configname: CONFIG_NET_DSA

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Distributed Switch Architecture support
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
This allows you to use hardware switch chips that use
the Distributed Switch Architecture.

source code:
net/dsa/
selects
CONFIG_PHYLIB

depends
CONFIG_EXPERIMENTAL
CONFIG_NET
NOT CONFIG_S390 or CONFIG_HAVE_NET_DSA