jhg03a commented on issue #2500: astats providing bad interface data with virtio KVM driver on ATS servers URL: https://github.com/apache/trafficcontrol/issues/2500#issuecomment-449753739 Upon further thought it seems like either it's going to be a fix in astats with a new default_link_speed parameter in astats.config, or we simply remove bandwidth calculation from the TM health protocol in the case where the link speed cannot be determined. The reason virtio doesn't have a link speed is because it's not a concept with that network driver. It's simply shoving bits at the hypervisor as fast as possible which means sometimes you may have exceptionally fast transfers while other times they may be congested. The e1000 driver still has the same problems but it establishes an upper bound to emulate physical hardware with a 1G interface instead of taking advantage of a deeper integration with the hypervisor.
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