I don't understand what this logs are trying to tell me?
I'd start with Rule #7 in Rulz post. It has helped others with this issue.
You might also want to look in the Kernal Messages log for any errors from your NICs.
UTM - 9.711 | Intel Xeon 4-core v3 1225 3.20Ghz 16GB Memory | 500GB SATA HDD | GB Ethernet x5