I have a PIX setup with several IPSec site-to-site tunnels. We added a second NIC, connected to a new ISP. We have begun moving VPNs over to the new NIC, and after moving them, we are unable to ping from one private network to another. This worked fine on the old ISP/NIC. I have tried allowing ICMP through the ACLs with no change.
What else can I look for that could be prohibiting pings through the VPN tunnels?