Thanks for your respond,  I've solved it with using dos-control icmp 1024 in switch, I don't know how . But I think the root cause is from the switch  And then , wheh we want to check ping with using 1024 it backs to normally  Solved 
Hei Folks,  At First Time , I would like to ask something, Is there anybody here ever got problem with try to ping IP with -t -l more than 512 and did not working ? Now I've tried to ping IP Management Server( iDRAC & CMC ) by client with -t -l 1024 and work. But when I want to ping the host ( Suse ) with -t -l 1024 the result is RTO and then I try ping it to 512 and It worked. It doesn't want to ping more than 512 , like 513 ( Will be RTO )  I have call the support, and email but still don't get the result . And It's all already happened for two weeks  Thanks   AT     
Unable To Ping More Than 512 Byte