it worked like a charm thanks GRANT3779 :-)

already done that.. #show ip routeCodes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1,...

172.16.1.1 is a UTM device acting as a Gateway..  

here are the ping result Mcubecore2#pingProtocol [ip]:Target IP address: 172.16.1.1Repeat count [5]:Datagram size [100]:Timeout in seconds [2]:Extended commands [n]: ySource address or interface: 172.17.1.30Type of service [0]:Set DF bit in IP header...

on Gateway i have an entry with 172.17.0.0/16 to 172.16.1.1