Thank you so much for your reply,
Yes, the network SiteB + SiteC is an IPLC Line.
at SiteC, the IP address = 172.28.0.0 /16 at SiteB, the IP address = 172.27.0.0 / 16 at SiteA, the IP address = 172.27.28.0/24
Users at sitA can access the resources in SiteB without problem, but they can not go to SiteC
When I triedt to ping Site C subnets from Site A, there is no reply like the following result:
( by using Ethereal ) Source Destination Protocol Info
172.27.28.55 172.28.0.11 ICMP Echo (ping) Request repeat..
So, no Echo(ping)reply...Do you know what the problem is ?
On the other side, by using "tracert", always timeout....
I also tried to add all IP subnets to the NAT0...and teh VPN ACL..but in vain.
So, need your help..
Thank you Benson