Section: 19.4.2.13 PGW Set FQDN
Content: A PGW Set Identifier is a globally unique identifier of a set of equivalent and interchangeable PGWs from a given network that provides distribution, redundancy and scalability. A PGW Set Identifier shall be constructed from the MCC, MNC and a Set ID. The PGW Set FQDN shall be constructed as follows: set<Set Id>.pgwset.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org where - <MNC> = 3 digits - <MCC> = 3 digits If there are only 2 significant digits in the MNC, one "0" digit shall be inserted at the left side to fill the 3 digits coding of MNC in the PGW Set FQDN. - <Set Id> is the string representing a PGW Set within the PLMN, chosen by the operator, that shall consist of alphabetic characters (A-Z and a-z), digits (0-9) and/or the hyphen (-) and that shall end with either an alphabetic character or a digit, where the case of alphabetic characters is not significant (i.e. two PGW Set IDs with the same characters but using different lower and upper cases identify the same PGW Set). EXAMPLE: "set12.pgwset.epc.mnc012.mcc345.3gppnetwork.org" (for the PGW set from MCC 345, MNC 12 and Set ID "12")