Errors In Lan
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How come I have these errors In lan? bad NIC?
My LAN is connected to a Cisco switch SG 200-26.
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faulty wiring or faulty network card or faulty cisco switch
i'd try to swap them in that order ;)
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678 packets out of 743070326? That is a 0.00009124304608551951% error rate. Don't worry about it.
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Ethernet error counters should be zero. You might want to be sure it wasn't a specific event like making a network change, replacing a cable, etc before you chase it down. Is it incrementing? Steadily?
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Ethernet error counters should be zero. You might want to be sure it wasn't a specific event like making a network change, replacing a cable, etc before you chase it down. Is it incrementing? Steadily?
Yes but it's not every day, the only network change is clients on and off
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I would want to find it. See if there are any errors in the switch. Replacing the cable is the easiest place to start.
Regarding changes I'm talking things that touch the physical layer. Plugging and unplugging, rebooting, etc. And things on other switch ports shouldn't matter - just the specific switch port and the connected LAN port.
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Interesting to note on my PFSense.
WAN LAN ADMIN Packets In 1458563363 1353600630 1397530 Packets Out 1345103593 1457907316 122592 Bytes In 968.42 GB 1090.12 GB 310.61 MB Bytes Out 1083.66 GB 972.47 GB 8.90 MB Errors In 42543 36801 0 Errors Out 0 0 6 Collisions 0 0 0Switch statistics
Port Received Packets w/o Error Received Packets with Error Broadcast Received Packets Transmitted Packets w/o Errors WAN 2170231073 0 721104 1345095203 LAN 1457632636 0 6033 1349808440Kind of funny that the NIC has errors on both ports, inbound, but the switch has none. PFSense has 90 days of uptime, same as my switch because of a power outage, , maybe I was messing around with something during the past 3 months that indirectly caused "errors". That's an average of 0.00292%. I just stopped a ping against YouTube that has been running for 296.74 hours, which only had 318 losses over 2136490 packets, which is 0.014884%.
Seeing that the ping was a full round trip, to make it comparable, I have to split the average across all interface. 8 hops, which means 16 interfaces, there and back. 1.014884^(1/16) = 1.0009238 or 0.0009238% loss per hop. Seems my per hop loss to youtube is about 1/3 the loss from my switch to my firewall. Something else is at play, it's not randomly distributed.
I'm not trying to hijack, just trying to add other view points with an example.
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over a terabyte in 43 days??!? :o
Dude! 8)
But seriously- Id wonder why as well…
Put a simple switch between the two ports and see if the errors stop.
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So all the errors are between the switch and the LAN NIC. You swapped that cable I assume?
It could be something obscure inducing interference in the cable. Does that cable run past any appliances/machinery etc? You could put an STP cable in there.
Is it a Gigabit connection? Does it need to be?Steve
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Think I have found the error, it was the onboard NIC (LAN) on my PfSense box.
After I had tried to switch cable and lan port on the switch.
I threw a new second PfSense box on and the error disappeared. had unfortunately not a new NIC card to test with,
but think I'll try that sometime or maybe a fiber NIC to my switch. Does anyone have a recommendation on a 1Gb /s fiber NIC? -
i wouldn't bother with fiber nic's. They are expensive ($200-$2000) and offer no benefits over short distances.
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Fiber can take errors too if dirty, etc. Sometimes they even just stop working. Copper should be clean to 100m.
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Thanks
I think i will stick with copper cable.
