It sounds like your answer is in the log:

SO_RCVBUF is finally 425984

Feb 18 18:33:19 CICTPH01LLB01 /usr/sbin/kamailio[18817]: ERROR: <core> [core/tcp_main.c:2863]: tcp_init(): bind(d, 0x7f81495f1efc, 16) on 127.0.0.1:5060 : Address already in use


Sent from mobile, with due apologies for brevity and errors.

On Feb 23, 2021, at 2:02 AM, Amul Tyagi <am@lgorithmsolutions.com> wrote:

SO_RCVBUF is finally 425984

Feb 18 18:33:19 CICTPH01LLB01 /usr/sbin/kamailio[18817]: ERROR: <core> [core/tcp_main.c:2863]: tcp_init(): bind(d, 0x7f81495f1efc, 16) on 127.0.0.1:5060 : Address already in use