StarterWare lwip Timeout function

Hi,

We need some advice about the StarterWare lwip application.
Our customer's application is using Ethernet on AM335x based on StarterWare_02_00_01_01 lwIP sample code.
The AM335x's Watchdog timer gets reset with a few hours of continuous operation .

After some debugging we have found that this WDT reset happens when sending
data through lwIP module. I believe that we need to add a timeout function to
the lwIP and some E2E posts mentions that we need to add periodical
call tcp_tmr and "sys_check_timeouts" to the main function.

Can we assume that Starterware sample code doesnot implement function,
and sys_check_timeouts should be added to the main program? And what is the preferred timeout period(is it 250ms?).

Best Regards
Kummi