In LTE environment there is the IDA (Insert Subscriber Data answer) message (Diameter protocol) that is sent by MME to HSS as reply to IDR message. The version 1.12.1 of Wireshark doesn't display the 'PCSCF restoration' feature list flag in IDA message in pcap file although MME is sending it (MME gets this request flag properly in IDR message and replies correctly as feature is enabled in MME). I see also that IDR message doesn't contain all feature flag list bits (feature list 1 & 2). Can anyone help on this one ? Thx asked 23 Apr '15, 05:44  costas |
One Answer:
We do not support the dissection of those flags yet. Could you fill an enhancement request on Bugzilla witha pcap file attached so that we can verify the implementation? Edit: when looking at 3GPP 29.272 release 13.1.0, I can only see bit 0 being used in IDA Flags IE (chapter 7.3.47). Could you indicate which specification describes this P-CSCF Restoration flag? I can only find it in IDR Flags IE. answered 23 Apr '15, 06:48  Pascal Quantin edited 23 Apr '15, 07:16 Hi Pascal, Thank you for your answer. First of all the P-CSCF restoration procedure is described in 3GPP TS 23.380 subcaluse 5.4. In chapter 7.3.10 regarding the IDR flag bits you can see that bit 8 refers to PCSCF restoration. Furthermore in IDA message the AVP supported features may contain two feature lists, one with list ID 1 and one with ID 2. The feature bit 16 of the feature list 2 is regarding the PCSCF restoration as you can see also in table 7.3.10/2 of the 29272 3GPP doc v13.10. Yes, I could open an ER on Bugzilla attaching also the requested pcap file. Thank you very much once more. Kostas (23 Apr '15, 08:06) costas |
Can you try the current version, 1.12.4, or a development build, 1.99.5?
That's currently not implemented for feature list 2 only bit 0 and 1 is implemented.(packet-diameter_3gpp.c AVP 630 ref TS 29.272 11.7.0)
Hi Anders, Yes, this is what I also see. Only two bits (0 and 1) are set for FeatureList2 , for SMS in SGSN and MME. Do you know if there are plans for implementing the rest bits according to latest 3GPP doc? Thank you. Kostas