Hi, I’m trying to configure osmo-bsc to connect to an IPA based MSC and get a failure when activating the sigtran stack. Here’s the log: root@sysmobts-v2:/etc/osmocom# osmo-bsc -c /etc/osmocom/osmo-bsc.cfg <001d> ../../git/src/osmo_ss7.c:1269 0: ASP Restart for server not implemented yet! % Ignoring deprecated logging level everything % Ignoring deprecated logging level everything % dyn_ts_allow_tch_f is deprecated, rather use msc/codec-list to pick codecs <0011> ../../../git/src/vty/telnet_interface.c:104 telnet at 0.0.0.0 4242 <0013> ../../git/src/input/ipaccess.c:853 enabling ipaccess BSC mode on 0.0.0.0 with OML 3002 and RSL 3003 TCP ports <0018> ../../../git/src/ctrl/control_if.c:866 CTRL at 0.0.0.0 4249 <0008> ../../../git/src/osmo-bsc/osmo_bsc_sigtran.c:427 Initializing SCCP connection to MSC msc-0 <0008> ../../../git/src/osmo-bsc/osmo_bsc_sigtran.c:437 CS7 Instance identifier, A-Interface: 0 <001e> ../../git/src/sccp_user.c:397 msc-0: Using SS7 instance 0, pc:0.23.3 <001e> ../../git/src/sccp_user.c:411 msc-0: Creating AS instance <0005> ../../../git/src/osmo-bsc/osmo_bsc_main.c:504 Failed to initalize sigtran backhaul. I used the configuration posted by Harald part of ticker https://osmocom.org/issues/2544 https://osmocom.org/attachments/3154/osmo-bsc.cfg.ipa and get the same result. How can I troubleshoot further in order to know what’s happening? Best regards Roch.