when enter a ue, gnb cannot attach to the core #570

pchat-imm · 2024-04-23T09:55:56Z

pchat-imm
Apr 23, 2024

I'm following this tutorial: https://docs.srsran.com/projects/project/en/latest/tutorials/source/cotsUE/source/index.html#configuration
At first, I can run gNB connecting to open5GS that is build from source

# open5gs
>> cd /open5gs/
>> ./build/tests/app/5gc

# gNB
>> cd srsRAN_Project/build/apps/gnb
>> sudo ./gnb -c gnb_rftest.yaml

Without UE, gNB can connect to open5gs, the connection is stable.
However, with a UE, open5gs shows the gnb keep be added and removed. Therefore, could be the result that the ue cannot connect to the internet.

log example from open5gs sample.yaml that shows gnb keep be added and removed. And the full log is attached down below

04/23 16:19:07.771: [amf] INFO: gNB-N2 accepted[127.0.0.1]:45687 in ng-path module (../src/amf/ngap-sctp.c:113)
04/23 16:19:07.771: [amf] INFO: gNB-N2 accepted[127.0.0.1] in master_sm module (../src/amf/amf-sm.c:757)
04/23 16:19:07.774: [amf] INFO: [Added] Number of gNBs is now 1 (../src/amf/context.c:1236)
04/23 16:19:07.774: [amf] INFO: gNB-N2[127.0.0.1] max_num_of_ostreams : 30 (../src/amf/amf-sm.c:796)
04/23 16:21:10.695: [amf] INFO: InitialUEMessage (../src/amf/ngap-handler.c:401)
04/23 16:21:10.695: [amf] INFO: [Added] Number of gNB-UEs is now 1 (../src/amf/context.c:2656)
04/23 16:21:10.695: [amf] INFO:     RAN_UE_NGAP_ID[0] AMF_UE_NGAP_ID[1] TAC[7] CellID[0x66c000] (../src/amf/ngap-handler.c:562)
04/23 16:21:10.695: [amf] INFO: Unknown UE by 5G-S_TMSI[AMF_ID:0x20040,M_TMSI:0xc00004fc] (../src/amf/context.c:1858)
04/23 16:21:10.695: [amf] INFO: [Added] Number of AMF-UEs is now 1 (../src/amf/context.c:1621)
04/23 16:21:10.695: [gmm] INFO: Registration request (../src/amf/gmm-sm.c:1224)
04/23 16:21:10.695: [gmm] INFO: [Unknown ID]    5G-S_GUTI[AMF_ID:0x20040,M_TMSI:0xc00004fc] (../src/amf/gmm-handler.c:185)
04/23 16:21:10.715: [gmm] INFO: Identity response (../src/amf/gmm-sm.c:1492)
04/23 16:21:10.715: [gmm] INFO: [suci-0-001-01-0-0-0-0000062714]    SUCI (../src/amf/gmm-handler.c:944)
04/23 16:21:10.980: [gmm] INFO: [imsi-001010000062714] Registration complete (../src/amf/gmm-sm.c:2323)
04/23 16:21:10.980: [amf] INFO: [imsi-001010000062714] Configuration update command (../src/amf/nas-path.c:591)
04/23 16:21:10.980: [gmm] INFO:     UTC [2024-04-23T09:21:10] Timezone[0]/DST[0] (../src/amf/gmm-build.c:558)
04/23 16:21:10.980: [gmm] INFO:     LOCAL [2024-04-23T16:21:10] Timezone[25200]/DST[0] (../src/amf/gmm-build.c:563)
04/23 16:21:13.841: [amf] INFO: UE Context Release [Action:2] (../src/amf/ngap-handler.c:1696)
04/23 16:21:13.841: [amf] INFO:     RAN_UE_NGAP_ID[0] AMF_UE_NGAP_ID[1] (../src/amf/ngap-handler.c:1697)
04/23 16:21:13.841: [amf] INFO:     SUCI[suci-0-001-01-0-0-0-0000062714] (../src/amf/ngap-handler.c:1701)
04/23 16:21:13.841: [amf] INFO: [Removed] Number of gNB-UEs is now 0 (../src/amf/context.c:2663)
04/23 16:21:19.251: [amf] INFO: InitialUEMessage (../src/amf/ngap-handler.c:401)
04/23 16:21:19.251: [amf] INFO: [Added] Number of gNB-UEs is now 1 (../src/amf/context.c:2656)
04/23 16:21:19.251: [amf] INFO: [suci-0-001-01-0-0-0-0000062714]    5G-S_TMSI[AMF_ID:0x20040,M_TMSI:0xc0000696] (../src/amf/ngap-handler.c:482)
04/23 16:21:19.251: [amf] INFO:     RAN_UE_NGAP_ID[1] AMF_UE_NGAP_ID[2] TAC[7] CellID[0x66c000] (../src/amf/ngap-handler.c:562)
04/23 16:21:19.251: [gmm] INFO: Service request (../src/amf/gmm-sm.c:1410)
04/23 16:21:19.251: [gmm] INFO: [suci-0-001-01-0-0-0-0000062714]    5G-S_GUTI[AMF_ID:0x20040,M_TMSI:0xc0000696] (../src/amf/gmm-handler.c:651)
04/23 16:21:19.396: [amf] INFO: [Added] Number of AMF-Sessions is now 1 (../src/amf/context.c:2677)
04/23 16:21:19.396: [gmm] INFO: UE SUPI[imsi-001010000062714] DNN[internet] S_NSSAI[SST:1 SD:0xffffff] smContextRef [NULL] (../src/amf/gmm-handler.c:1285)
04/23 16:21:19.396: [gmm] INFO: No SMF Instance (../src/amf/gmm-handler.c:1322)
04/23 16:21:19.399: [sbi] WARNING: [SMF] (NRF-discover) NF has already been added [75529a4a-0152-41ef-a2fa-e9ee9a91bca8:1] (../lib/sbi/nnrf-handler.c:1163)
04/23 16:21:19.399: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.4:80] (../lib/sbi/context.c:2210)
04/23 16:21:19.399: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.4:7777] (../lib/sbi/context.c:1946)
04/23 16:21:19.399: [sbi] INFO: [SMF] (NF-discover) NF Profile updated [75529a4a-0152-41ef-a2fa-e9ee9a91bca8:1] (../lib/sbi/nnrf-handler.c:1201)
04/23 16:21:19.399: [smf] INFO: [Added] Number of SMF-UEs is now 1 (../src/smf/context.c:1019)
04/23 16:21:19.399: [smf] INFO: [Added] Number of SMF-Sessions is now 1 (../src/smf/context.c:3090)
04/23 16:21:19.402: [sbi] INFO: [SMF] (SCP-discover) NF registered [75529a4a-0152-41ef-a2fa-e9ee9a91bca8:1] (../lib/sbi/path.c:211)
04/23 16:21:19.404: [smf] INFO: UE SUPI[imsi-001010000062714] DNN[internet] IPv4[10.45.0.2] IPv6[] (../src/smf/npcf-handler.c:542)
04/23 16:21:19.404: [upf] INFO: [Added] Number of UPF-Sessions is now 1 (../src/upf/context.c:208)
04/23 16:21:19.404: [gtp] INFO: gtp_connect() [127.0.0.4]:2152 (../lib/gtp/path.c:60)
04/23 16:21:19.404: [upf] INFO: UE F-SEID[UP:0x683 CP:0x704] APN[internet] PDN-Type[1] IPv4[10.45.0.2] IPv6[] (../src/upf/context.c:485)
04/23 16:21:19.404: [upf] INFO: UE F-SEID[UP:0x683 CP:0x704] APN[internet] PDN-Type[1] IPv4[10.45.0.2] IPv6[] (../src/upf/context.c:485)
04/23 16:21:19.404: [gtp] INFO: gtp_connect() [127.0.1.100]:2152 (../lib/gtp/path.c:60)
04/23 16:21:19.451: [gtp] INFO: gtp_connect() [127.0.0.1]:2152 (../lib/gtp/path.c:60)
04/23 16:21:19.453: [amf] INFO: [imsi-001010000062714:5:11][0:0:NULL] /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify (../src/amf/nsmf-handler.c:867)
04/23 16:21:24.430: [amf] INFO: [imsi-001010000062714:5:13][0:0:NULL] /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify (../src/amf/nsmf-handler.c:867)
04/23 16:21:24.567: [amf] INFO: UE Context Release [Action:2] (../src/amf/ngap-handler.c:1696)
04/23 16:21:24.567: [amf] INFO:     RAN_UE_NGAP_ID[1] AMF_UE_NGAP_ID[2] (../src/amf/ngap-handler.c:1697)
04/23 16:21:24.567: [amf] INFO:     SUCI[suci-0-001-01-0-0-0-0000062714] (../src/amf/ngap-handler.c:1701)
04/23 16:21:24.567: [amf] INFO: [Removed] Number of gNB-UEs is now 0 (../src/amf/context.c:2663)

full log: