Hello Hellsing,
“Gn” interface, between SGSN and GGSN ? I cannot find any valid reason why it would behave in such a way. It is not normal, and should not even be possible ! 🙂
Have you done any other change ? For example, activation of the Gs interface, or actvation of LA/RA combined update ? Change of LAC planning, or RAC planning, on the radio side ?
Cheers,
pix