Bootup error

[John Johnstone]

On 10/27/2015 11:16 AM, Matthew Seaman wrote:
> On 2015/10/27 14:48, Jerry wrote:
>> nfe0: discard frame w/o leading ethernet header (len 0 pkt len 0)
>>
>> That will repeat on down the screen until I do a <CTRL> <ALT> <DEL> sequence
>> and shut the pc down. Usually, but not always, it will start up correctly
>> then. Sometime, I have had to leave the PC off for several  minutes before it
>> would reboot correctly.
>>
>> Can anyone tell me what is causing this and how to correct it?
>
> Something is emitting bogons[*] onto your LAN.  It could well be your
> nfe0 NIC, but it might be just about anything attached to your network.

I've seen this occasionally on a HP DL360 with HP Broadcom based NIC's 
running pfSense 2.2 which is built from FreeBSD 10.1.  It's always been 
after a cold boot, never while the system has been running.  I've only 
seen it just a few times.  It was a few months ago so I don't remember 
what fixed it but it was either just rebooting or removing and 
reconnecting the Ethernet cable.  I have no idea what caused it but I'm 
thinking something link specific, meaning just the link between the NIC 
that reported and the Ethernet switch. Some odd driver bug, Ethernet 
switch interaction (possibly autonegotiate) problem perhaps?  These same 
links run clean for many months otherwise.  Maybe bad connector seating 
on the initial plug-in.

It's important to realize that only a cut-through forwarding switch will 
propagate defective packets.  Many recent Ethernet switches in the < 
$100 category are store-and-forward.  They don't forward defective 
packets from one switch port to another.  The better / expensive 
switches are store-and-forward even ones that are 15 years or more old. 
  If there are errors and bad packets occurring on one port the trouble 
will remain on just that one port.

-
John J.