Well, changing the load balancing policy and upgrading the DvSwitch to version 6 didn't help. However I shut the VM down and added 4 E1000 NICs as a test. I reconfigured the firewall VM to use the new adapters instead of the VMXNET3. Changed load balancing back to "load based on physical NIC" and am still using VGT to separate traffic. As of now, it has gone the longest without experiencing the issue so far. About 16 hours so far without having to reboot the VM.. Will keep you guys posted.
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