Purpose <mipfilter>

Hi, i`d like to know how <mipfilter> sampler state maps to OpenGL/DirectX,
<minfilter> and <magfilter> map to
glTexParameteri(texTgtGL, GL_TEXTURE_MAG_FILTER, magFilterGL );
glTexParameteri(texTgtGL, GL_TEXTURE_MIN_FILTER, minFilterGL );

but what to do with <mipfilter>?

It’s basically redundant. See this thread.

Thanks