In [EPS 4G] E-UTRAN Authentication Procedure, is it allowed and common to return more than one vector?

Hi Experts.

In [EPS 4G] E-UTRAN Authentication Procedure, is it allowed and common to return more than one vector?

Depends how much configured in MME.

Yes it is.

But in roaming, you don’t know how much are configured in MME.

I see in the AIR, the number of vectors is requested.

Check in S6a answer.

Number of vectors returned…

Returned 3.

So it is oK.

But I keep on receiving AIRs and no ULR.

Yes, it’s configured in MME and you can see requested vector count in AIR sent to HSS.