No, rx_long_length_errors indicate the receipt of an overly large frame in excess of the MTU (this used to be called a "jabber" long ago, along with "runts" for frames that were too short) but it is 0 in this case. I'm not completely sure what rx_long_byte_count is trying to indicate, but it always seems to match rx_bytes precisely on every system I've seen. Unfortunately these counter names are not standardized between NIC vendors and can mean just about anything.
If I had to take a wild guess, perhaps rx_bytes indicates the number of payload/data (i.e. non-header) bytes received at the hardware NIC level off the wire, while rx_long_byte_count reports the number of payload/data bytes that actually made it up into the receive socket buffer (referenced by a ring buffer descriptor), after the DMA transfer from the NIC hardware buffer into Gaia's memory. Perhaps "long" in this context indicates a frame that has a nonzero number of payload/data bytes.
Obviously these two counter values should always match, and if they don't that indicates some kind of bug in the NIC driver or SoftIRQ routine that a coder would need to address. Just a guess though...
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