>>/44343/
It is unrelated to CIS. CIS is basically non-existent anyway, just a word without meaning. Economically there is so-called Eurasian Customs Union that includes some CIS parts. CSTO is some strange entity too, it isn't purely military block, and there are questions about it's effectiveness. Recent Karabakh conflict had one side (Armenia) from CSTO, and no one did anything.
Considering military side, Russia also has presence on Tajik/Afghan border from Soviet times, and border incidents with Afghanistan was numerous in 90s. With US involvement it became much more quiet, but now, I guess, these talks are all about that border again.