According to reports this morning the governing body were unwilling to offer the Nenagh native an extension to his central contract due to his age, much to the displeasure of Munster.
Ryan turns 34 in December, but the province are believed to be unhappy with the reasoning given Jamie Heaslip – who is one week older – had his contract extended last month.
The second row is set to link up with Ronan O'Gara at Racing 92 from the start of next season.
Meanwhile, Munster are giving Conor Murray “every opportunity” to prove his fitness ahead of Saturday's European Champions Cup quarter-final against Toulouse.
The scrum-half missed Ireland's final Six Nations game against England due to an injury he picked up the previous week against Wales.
