I have multiple circuits into a remote site. One of these circuits is a PTP DS3, and the other is a frac DS3 over MPLS. The MPLS connection is running BGP. I have a GRE tunnel configured over the MPLS circuit between 2 - 3845 routers.
EIGRP is configured in 1 AS and runs across the PTP and the GRE tunnel as well as the remote network. The problem that I have is that as soon as the GRE tunnel is enabled, the physical interface starts dropping packets. These drops only occur at one of the sites and it is consistent. When the tunnel interface is shut down, the drops stop occurring.
Any ideas on what is causing the dropped packets?