Reports suggest Phil Parkinson's time at Valley Parade could be up and both Blackburn Rovers and Bolton Wanderers are also said to be keen.
A report claims the Ibrox chief wanted by Championship side Derby County, whose players wanted Celtic's new boss.
Derby County have salvaged their season following Darren Wassall's appointment as manager until the end of the current campaign.
The Rams look set for the play-offs again this season.
The Derby County midfielder hasn't played a competitive game for the Rams since August.
The latest odds for Derby's manager going into next campaign.
Darren Wassall has won four of his first eight matches in charge at Derby County.
Derby County beat Nottingham Forest 1-0 at the iPro Stadium last weekend.
The pundit feels the 'football advisor' will have designs on the manager's job at Derby.
Redknapp has agreed an advisory role at Derby County.