UE can't reach internet

[modyngs]

Issue Description

Hi, I've used SRSRAN in the case that both EPC+RAN were in the same Machine or different machine but in the same LAN network. there was all well.

So then i decided to Use Cloud for EPC and Local PC for RAN! the problem appeared!

MME not receiving the Attach complete even though its seen in the trace taken on EPC host

Attach complete and Activate default bearer accept sent from eNB to EPC but again EPC is sending Downlink NAS transport with Attach accept and Activate default bearer request

Setup Details

Setup is as Follows: COTS UE is Samsung A42 and SDR is USRP B210 eNB is on local pc [ local ip=192.168.1.5, and DHCP public ip from ISP=5.64.x.x] RAN PC is core i7 6700, 16GB RAM, 128gb SSD with SrsRAN {master branch}and UHD_4.0 {master branch} Core (SRSEPC) is on openstack VM [ local ip= 192.168.1.23, Floating ip=46.102.143.85] with 4 vCPU,4G RAM, 20GB storage

UE   ==>>     SRSRAN    ===>>>       ISP DHCP IP add.       ===>>>     OPENSTACK     ==>>>          VM( SRSEPC)
     ==>>  192.168.1.5       ===>>>     5.64.x.x            ===>>>  46.102.143.85     ==>>>        192.168.1.23

Please find the Attached files of CORE& RAN bellow srsEPC.zip RAN.zip

Expected Behavior

I expect to have internet connection

Actual Behaviour

While i dont have interenet access! even in UE i can see 4G sign in just one Direction! but do can not ping or access any webpages.

Steps to reproduce the problem

in openstack VM : ( for EPC ) sudo apt-get update && sudo apt-get -y dist-upgrade && sudo reboot

sudo apt-get -y install build-essential cmake libfftw3-dev libmbedtls-dev libboost-program-options-dev libconfig++-dev libsctp-dev git clone https://github.com/srsRAN/srsRAN.git cd srsRAN && mkdir build && cd build cmake ../ make make test sudo make install sudo srsran_install_configs.sh user sudo nano ~/.config/srsran/epc.conf and change it as there is in EPC zip file (MME AND gtpu_bind_addr ip add. )

[modyngs]

Also the same test as above with different openstack VM add. for not conflicting to the Local eNB PC!

UE   ==>>     SRSRAN    ===>>>       ISP DHCP IP add.       ===>>>     OPENSTACK     ==>>>          VM( SRSEPC)
     ==>>  192.168.1.5       ===>>>     5.64.x.x            ===>>>  46.102.143.85     ==>>>        10.10.10.78

Here is the Logs_pcaps_confs of EPC EPC.zip RAN.zip

[modyngs]

SCTP peer address unreachable. Association: 0

this errors can be seen in LOGs

[modyngs]

SCTP peer address unreachable. Association: 0

This Problem Solved By changing MTU in both sides!

But still the problem of Not accessing to internet remained

in EPC:

in RAN:

Here is also new Logs_PCAP_configs: RAN.zip EPC.zip

[modyngs]

Problem Solved by setting MTU size

[90r1ll4]

Hi @modyngs the UE can still not reach the internet, the documentation is not helping me, i tried the above solution, not working for me, and also can you tell me the MTU size you set to? SDR i am using is bladeRF and LimeSDR