After adding default gw, the tcpdump & route command work strange.
 

route command display immediately all elements in routing table except the default gateway that display after 10 sec.

tcpdump command has delay of ~30 sec before start display the traffic.

Removing the default gw element from routing table solved the problem.

Thanks in advance

What if you try
route -n
and
tcpdump -n
? Is there still a delay?

thanks it help no delay
 

Why ?
In Linux 2.4 there is no need to use -n.
Thanks