I will get you a pcap.  The UE actually don’t have an APN listed by default.

 

ISP Supplies

cid:image002.jpg@01D5B005.DEE3BE10

David Peterson
Senior Engineer
855-947-7776 ext. 9214
c 419-706-7355
d 979-314-1305
https://www.ispsupplies.com Facebook Twitter LinkedIn

 

 

From: Sukchan Lee <acetcom@gmail.com>
Sent: Saturday, March 28, 2020 7:58 PM
To: david@ispsupplies.com
Cc: nextepc@lists.osmocom.org
Subject: Re: Reject message

 

Even though UE try to connect without APN, if you set the first APN(default APN) to the mongoDB, open5gs won't reject the UE request. If the problem is still not resolved, I need your pcap file to fix the issue.

 

On Fri, Mar 27, 2020 at 12:10 PM <david@ispsupplies.com> wrote:

I figured out what was going on, so perhaps there is a solution already in place.  By default the Baicells UE do not request a specific APN.  That causes the EPC to reject the request.

 

ISP Supplies

cid:image002.jpg@01D5B005.DEE3BE10

David Peterson
Senior Engineer
855-947-7776 ext. 9214
c 419-706-7355
d 979-314-1305
https://www.ispsupplies.com Facebook Twitter LinkedIn

 

 

From: Sukchan Lee <acetcom@gmail.com>
Sent: Friday, March 27, 2020 11:57 AM
To: david@ispsupplies.com
Cc: nextepc@lists.osmocom.org
Subject: Re: Reject message

 

Hi david,

 

If pcap is provided, it is more easier to analyze your problem.

 

BTW, from your log, I've found PDN connectivity reject with ESM_CAUSE:27.

It means that UE APN is unknown in HSS. So, you need to match APN name between UE and HSS.

 

Thanks and regards,

   Sukchan

 

On Tue, Mar 17, 2020 at 6:47 PM <david@ispsupplies.com> wrote:

Does anyone know why I am getting this reject reason for network entry on a UE?

 

03/17 16:56:55.026: [mme] DEBUG: [EMM] Authentication request (../src/mme/nas-path.c:180)

03/17 16:56:55.026: [mme] DEBUG:     IMSI[311980000033212] (../src/mme/nas-path.c:181)

03/17 16:56:55.026: [mme] DEBUG: [MME] DownlinkNASTransport (../src/mme/s1ap-build.c:186)

03/17 16:56:55.026: [mme] DEBUG:     ENB_UE_S1AP_ID[41] MME_UE_S1AP_ID[17] (../src/mme/s1ap-build.c:231)

03/17 16:56:55.026: [mme] DEBUG:     IP[10.100.108.9] ENB_ID[67177119] (../src/mme/s1ap-path.c:79)

03/17 16:56:55.189: [mme] DEBUG: mme_state_operational(): MME_EVT_S1AP_MESSAGE

(../src/mme/mme-sm.c:129)

03/17 16:56:55.189: [mme] DEBUG: s1ap_state_operational(): MME_EVT_S1AP_MESSAGE

(../src/mme/s1ap-sm.c:60)

03/17 16:56:55.189: [mme] DEBUG: [MME] Uplink NAS transport (../src/mme/s1ap-handler.c:330)

03/17 16:56:55.189: [mme] DEBUG:     IP[10.100.108.9] ENB_ID[67177119] (../src/mme/s1ap-handler.c:347)

03/17 16:56:55.189: [mme] DEBUG:     ENB_UE_S1AP_ID[41] MME_UE_S1AP_ID[17] (../src/mme/s1ap-handler.c:354)

03/17 16:56:55.189: [mme] DEBUG: mme_state_operational(): MME_EVT_EMM_MESSAGE

(../src/mme/mme-sm.c:129)

03/17 16:56:55.189: [emm] DEBUG: emm_state_authentication(): MME_EVT_EMM_MESSAGE

(../src/mme/emm-sm.c:488)

03/17 16:56:55.189: [emm] DEBUG: [EMM] Authentication response (../src/mme/emm-sm.c:512)

03/17 16:56:55.189: [emm] DEBUG:     IMSI[311980000033212] (../src/mme/emm-sm.c:513)

03/17 16:56:55.189: [emm] DEBUG: emm_state_authentication(): EXIT

(../src/mme/emm-sm.c:488)

03/17 16:56:55.189: [emm] DEBUG: emm_state_security_mode(): ENTRY

(../src/mme/emm-sm.c:649)

03/17 16:56:55.189: [mme] DEBUG: [EMM] Security mode command (../src/mme/nas-path.c:207)

03/17 16:56:55.189: [mme] DEBUG:     IMSI[311980000033212] (../src/mme/nas-path.c:208)

03/17 16:56:55.190: [emm] DEBUG:     Replayed UE SEC[LEN:2 EEA:0xe0 EIA:0xe0 UEA:0x0 UIA:0x0 GEA:0x0] (../src/mme/emm-build.c:287)

03/17 16:56:55.190: [emm] DEBUG:     Selected[Integrity:0x1 Encrypt:0x0] (../src/mme/emm-build.c:289)

03/17 16:56:55.190: [mme] DEBUG: [MME] DownlinkNASTransport (../src/mme/s1ap-build.c:186)

03/17 16:56:55.190: [mme] DEBUG:     ENB_UE_S1AP_ID[41] MME_UE_S1AP_ID[17] (../src/mme/s1ap-build.c:231)

03/17 16:56:55.190: [mme] DEBUG:     IP[10.100.108.9] ENB_ID[67177119] (../src/mme/s1ap-path.c:79)

03/17 16:56:55.229: [mme] DEBUG: mme_state_operational(): MME_EVT_S1AP_MESSAGE

(../src/mme/mme-sm.c:129)

03/17 16:56:55.230: [mme] DEBUG: s1ap_state_operational(): MME_EVT_S1AP_MESSAGE

(../src/mme/s1ap-sm.c:60)

03/17 16:56:55.230: [mme] DEBUG: [MME] Uplink NAS transport (../src/mme/s1ap-handler.c:330)

03/17 16:56:55.230: [mme] DEBUG:     IP[10.100.108.9] ENB_ID[67177119] (../src/mme/s1ap-handler.c:347)

03/17 16:56:55.230: [mme] DEBUG:     ENB_UE_S1AP_ID[41] MME_UE_S1AP_ID[17] (../src/mme/s1ap-handler.c:354)

03/17 16:56:55.230: [mme] DEBUG: mme_state_operational(): MME_EVT_EMM_MESSAGE

(../src/mme/mme-sm.c:129)

03/17 16:56:55.230: [emm] DEBUG: emm_state_security_mode(): MME_EVT_EMM_MESSAGE

(../src/mme/emm-sm.c:649)

03/17 16:56:55.230: [emm] DEBUG: [EMM] Security mode complete (../src/mme/emm-sm.c:676)

03/17 16:56:55.230: [emm] DEBUG:     IMSI[311980000033212] (../src/mme/emm-sm.c:677)

03/17 16:56:55.230: [mme] DEBUG: [MME] Update-Location-Request (../src/mme/mme-fd-path.c:444)

03/17 16:56:55.231: [emm] DEBUG: emm_state_security_mode(): EXIT

(../src/mme/emm-sm.c:649)

03/17 16:56:55.231: [emm] DEBUG: emm_state_initial_context_setup(): ENTRY

(../src/mme/emm-sm.c:817)

03/17 16:56:55.234: [mme] DEBUG: [MME] Update-Location-Answer (../src/mme/mme-fd-path.c:610)

03/17 16:56:55.234: [mme] DEBUG:     Result Code: 2001 (../src/mme/mme-fd-path.c:651)

03/17 16:56:55.234: [mme] DEBUG:     From 'hss.localdomain' (../src/mme/mme-fd-path.c:680)

03/17 16:56:55.234: [mme] DEBUG:          ('localdomain') (../src/mme/mme-fd-path.c:693)

03/17 16:56:55.234: [mme] DEBUG: mme_state_operational(): MME_EVT_S6A_MESSAGE

(../src/mme/mme-sm.c:129)

03/17 16:56:55.234: [mme] DEBUG: mme_state_operational(): MME_EVT_ESM_MESSAGE

(../src/mme/mme-sm.c:129)

03/17 16:56:55.234: [mme] DEBUG: mme_bearer_find_or_add_by_message() [PTI:8, EBI:0] (../src/mme/mme-context.c:2847)

03/17 16:56:55.234: [esm] DEBUG: esm_state_initial(): ENTRY

(../src/mme/esm-sm.c:38)

03/17 16:56:55.234: [esm] DEBUG: esm_state_inactive(): ENTRY

(../src/mme/esm-sm.c:61)

03/17 16:56:55.234: [mme] INFO: Added a session. Number of sessions is now 1 (../src/mme/mme-context.c:79)

03/17 16:56:55.234: [esm] DEBUG: esm_state_inactive(): MME_EVT_ESM_MESSAGE

(../src/mme/esm-sm.c:61)

03/17 16:56:55.234: [esm] DEBUG: [ESM] PDN Connectivity request (../src/mme/esm-sm.c:82)

03/17 16:56:55.234: [esm] DEBUG:     IMSI[311980000033212] PTI[8] EBI[5] (../src/mme/esm-sm.c:84)

03/17 16:56:55.234: [esm] DEBUG:     EIT(ESM information transfer)[1] (../src/mme/esm-handler.c:59)

03/17 16:56:55.234: [esm] DEBUG: [ESM] ESM information request (../src/mme/esm-build.c:75)

03/17 16:56:55.234: [esm] DEBUG:     IMSI[311980000033212] PTI[8] EBI[5] (../src/mme/esm-build.c:77)

03/17 16:56:55.235: [mme] DEBUG: [MME] DownlinkNASTransport (../src/mme/s1ap-build.c:186)

03/17 16:56:55.235: [mme] DEBUG:     ENB_UE_S1AP_ID[41] MME_UE_S1AP_ID[17] (../src/mme/s1ap-build.c:231)

03/17 16:56:55.235: [mme] DEBUG:     IP[10.100.108.9] ENB_ID[67177119] (../src/mme/s1ap-path.c:79)

03/17 16:56:55.269: [mme] DEBUG: mme_state_operational(): MME_EVT_S1AP_MESSAGE

(../src/mme/mme-sm.c:129)

03/17 16:56:55.270: [mme] DEBUG: s1ap_state_operational(): MME_EVT_S1AP_MESSAGE

(../src/mme/s1ap-sm.c:60)

03/17 16:56:55.270: [mme] DEBUG: [MME] Uplink NAS transport (../src/mme/s1ap-handler.c:330)

03/17 16:56:55.270: [mme] DEBUG:     IP[10.100.108.9] ENB_ID[67177119] (../src/mme/s1ap-handler.c:347)

03/17 16:56:55.270: [mme] DEBUG:     ENB_UE_S1AP_ID[41] MME_UE_S1AP_ID[17] (../src/mme/s1ap-handler.c:354)

03/17 16:56:55.270: [mme] DEBUG: mme_state_operational(): MME_EVT_ESM_MESSAGE

(../src/mme/mme-sm.c:129)

03/17 16:56:55.270: [mme] DEBUG: mme_bearer_find_or_add_by_message() [PTI:8, EBI:0] (../src/mme/mme-context.c:2847)

03/17 16:56:55.270: [esm] DEBUG: esm_state_inactive(): MME_EVT_ESM_MESSAGE

(../src/mme/esm-sm.c:61)

03/17 16:56:55.270: [esm] DEBUG: [ESM] ESM information response (../src/mme/esm-sm.c:93)

03/17 16:56:55.270: [esm] DEBUG:     IMSI[311980000033212] PTI[8] EBI[5] (../src/mme/esm-sm.c:95)

03/17 16:56:55.270: [mme] DEBUG: [EMM] Attach reject (../src/mme/nas-path.c:134)

03/17 16:56:55.270: [mme] DEBUG:     IMSI[311980000033212] Cause[8] (../src/mme/nas-path.c:135)

03/17 16:56:55.270: [esm] DEBUG: [ESM] PDN connectivity reject (../src/mme/esm-build.c:39)

03/17 16:56:55.270: [esm] DEBUG:     IMSI[311980000033212] PTI[8] Cause[27] (../src/mme/esm-build.c:41)

03/17 16:56:55.271: [mme] DEBUG: [MME] DownlinkNASTransport (../src/mme/s1ap-build.c:186)

03/17 16:56:55.271: [mme] DEBUG:     ENB_UE_S1AP_ID[41] MME_UE_S1AP_ID[17] (../src/mme/s1ap-build.c:231)

03/17 16:56:55.271: [mme] DEBUG:     IP[10.100.108.9] ENB_ID[67177119] (../src/mme/s1ap-path.c:79)

03/17 16:56:55.271: [esm] DEBUG: esm_state_inactive(): EXIT

(../src/mme/esm-sm.c:61)

03/17 16:56:55.271: [esm] DEBUG: esm_state_exception(): ENTRY

(../src/mme/esm-sm.c:345)

03/17 16:56:55.271: [mme] DEBUG: [MME] UE Context release command (../src/mme/s1ap-path.c:285)

03/17 16:56:55.271: [mme] DEBUG:     ENB_UE_S1AP_ID[41] MME_UE_S1AP_ID[17] (../src/mme/s1ap-path.c:287)

03/17 16:56:55.271: [mme] DEBUG:     Group[3] Cause[0] Action[3] Delay[0] (../src/mme/s1ap-path.c:306)

03/17 16:56:55.271: [mme] DEBUG:     IP[10.100.108.9] ENB_ID[67177119] (../src/mme/s1ap-path.c:79)

03/17 16:56:55.275: [mme] DEBUG: mme_state_operational(): MME_EVT_S1AP_MESSAGE

(../src/mme/mme-sm.c:129)

03/17 16:56:55.275: [mme] DEBUG: s1ap_state_operational(): MME_EVT_S1AP_MESSAGE

(../src/mme/s1ap-sm.c:60)

03/17 16:56:55.275: [mme] DEBUG: [MME] UE Context release complete (../src/mme/s1ap-handler.c:919)

03/17 16:56:55.276: [mme] DEBUG:     IP[10.100.108.9] ENB_ID[67177119] (../src/mme/s1ap-handler.c:933)

03/17 16:56:55.276: [mme] DEBUG:     ENB_UE_S1AP_ID[41] MME_UE_S1AP_ID[17] (../src/mme/s1ap-handler.c:950)

03/17 16:56:55.276: [mme] DEBUG:     Action: UE context remove() (../src/mme/s1ap-handler.c:963)

03/17 16:56:55.276: [mme] INFO: Removed a UE. Number of UEs is now 0 (../src/mme/mme-context.c:63)

03/17 16:56:55.276: [emm] DEBUG: emm_state_initial_context_setup(): EXIT