Forum Discussion
Chris_103447
Jul 20, 2015Altocumulus
The issue here was a conflict between Auto Last Hop and our virtual environment. For some reason, traffic through our QLogic converged network adapters would carry the host MAC rather than the virtual NIC MAC, and Auto Last Hop would try to return traffic to the host rather than the guest.
We suspect that this may be related to the QLogic CNAs, as they have exhibited strange behavior in other situations and are renowned for bad driver issues (on both Hyper-V and vSphere). For now, we've worked around it by disabling Auto Last Hop globally. We aren't losing anything by that action compared to our prior setup on Kemp VLMs, which didn't have an Auto Last Hop feature.
Thanks,
Chris