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#1
09-09-2002
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what does the ifconfig 'frame' field mean?
After typing /sbin/ifconfig eth0, I get these two lines (among others):
RX packets:3781025 errors:0 dropped:0 overruns:0 frame:0 TX packets:1941909 errors:0 dropped:0 overruns:0 carrier:0 What does the 'frame' and 'carrier' field mean? It maybe quite trivial but it has become a major bother for me while doing my current task.  |
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#2
09-09-2002
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The exact meaning will depend on your ethernet card and your ethernet driver. Ethernet needs to see that it has a clear line before it will try to send. Detecting that clear line is called "carrier sense". So your "carrier" would probably include any cases where the card didn't see carrier so it could not send. A drop in carrier during transmission could also be called "carrier". Your carrier field may or may not include such a drop.
Ethernet calls the packets that it sends "frames". A "framing error" is when the card detects a packet that can't possibly be valid. I would expect this to certainly include frames that are not a multiple of 8 bits. It may or may include frames that are way too short or way too long. |
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