FreeRTOS-Plus-TCP Echo Posix demo application does not work on Ubuntu Host Machine

These were the logs added for debugging purpose (FreeRTOS-Plus-TCP/source/portable/NetworkInterface/libslirp/MBuffNetworkInterface.c).

For DHCP enabled, the application takes the IP address as 10.0.2.15 whereas I have configured the static IP for both systems. Do I still send the logs with just DHCP enabled?