IP Instance stops working SSP 1.7.12

HI.

In our proprietary board we have two ethernet interfaces (one for the lan and one for the wan). After a random time, it can be minutes or days, the interfaces stops working (mainly the wan that has telnet server). When interfaces crash, they don't even respond to ping.

I tried to debug the problem but unfortunately E2studio crashes after a while. What I have seen is that the IP Helper threads keep working even if they don't respond to the ping.

Now I have also enabled the traceX hoping to understand something. What do you think I should focus on?

Best Regards

Paolo