Does the LTE Demo need to be updated?

[edg135]

Hello,

I wanted to experiment with the LTE model so I tried running the demo. However, I was unable to get the lxcs to instantiate properly. When I tried to run letce2 lxc start I see a a bunch of errors. The first error say "lxc-execute: ue-01: conf.c: lxc_setup: 3569 No such file or directory - Unable to open lxc.init.static" which i assumed led to the other errors. Do you have any advice on how to handle this?

While I was looking through the demo files, I also noticed that the probes still refer to srslte. The srslte repo has been archived and it looks like srsRAN has replaced it. Should this be updated?

Thank you!

[sgalgano]

Which linux distribution and version are you using?

[edg135]

I was using Oracle Linux 8, specifically version 8.7 I followed the instructions for installing the EMANE bundle in RHEL/Rocky 8.

[sgalgano]

The lxc rpm distributed via Rocky 8 (probably the same with Oracle Linux 8) repositories is missing a build dependency in the spec file which causes the configure call invoked during rpm build to not build lxc.init.static. Adjacent Link distributes a bundle with pre-built lxc packages which include the necessary static components.

To use wget to download the latest release bundle for Rocky Linux lxc rpms with static init and verify the release signature with gpg2:

$ wget https://adjacentlink.com/downloads/emane/lxc-3.0.4-2.static_init-release-1.el8.tar.bz2
$ wget https://adjacentlink.com/downloads/emane/lxc-3.0.4-2.static_init-release-1.el8.tar.bz2.asc
$ gpg2 --verify lxc-3.0.4-2.static_init-release-1.el8.tar.bz2.asc

To unpack and install the bundle software:

$ tar xf lxc-3.0.4-2.static_init-release-1.el8.tar.bz2
$ sudo dnf install \
   lxc-3.0.4-2.static_init-release-1/rpms/el8/x86_64/lxc-3.0.4-2.static_init.el8.x86_64.rpm \
   lxc-3.0.4-2.static_init-release-1/rpms/el8/x86_64/lxc-libs-3.0.4-2.static_init.el8.x86_64.rpm 

Note: Adjacent Link bundles are signed using the Adjacent Link code signing key.

[edg135]

Ok awesome, I'll download these out and try them and let you know how it goes. Thank you!

[edg135]

After installing the packages, the lxcs instantiate now which is good. I've tried to run the demo a bunch of times in order to see what happens and I'm confused. There seems to be something weird with the srsue interface. Sometimes when I run the demo i can't seem to get the interface to even appear in the ue nodes. I have to rebuild the demo to get it to appear. Also, I've only had one run where i've been able to successfully ping from the UE to the EPC. Most of my runs, including my latest run, I can't seem to ping. When I tried to check the logs, in the UE logs i see "SYNC: Out-of-sync detected in PSS/SSS" and "Detected slow task processing". Is this significant to my issue?