Here's my Frost DK tank if you want to take a look at him. Yes, i know that current frost DK tanking is suppose to use 2 1h weapons but i don't currently have 2 1h tank weapons so i work with a 2h.

http://www.wowarmory.com/character-s...ldrin&n=Zalsar

and my tanking macro (multi-target tanking):

/castsequence reset=nocombat Icy Touch, Plague Strike, Howling Blast, Pestilence, Blood Strike, Obliterate, Howling Blast, Blood Strike, Blood Strike
/cast Rune Strike
/cast Blood Fury
/use 13
/use 14

Single target tanking would be like:

/castsequence reset=nocombat Icy Touch, Plague Strike, Obliterate, Blood Strike, Blood Strike, Obliterate, Obliterate, Blood Strike, Blood Strike