Ethernet duplex mismatch has to be the most common (if your fast
Ethernet doesn't seem to be able to push more than 5-10 Mbps, suspect
this). See Stanislav's writeup :
http://shlang.com/writing/tcp-perf.html
My personal favorite is re-use of MAC addresses on an Ethernet. (There
once was a switch vendor who used the same MAC address for an entire set
of machines. Worked fine unless you had two on the same LAN.) That is
very hard to diagnose IMO, but not common.
And, in the multicast world, there are the actions (or lack thereof)
of IGMP snooping switches. That can cause a wide variety of weirdness.
On Apr 10, 2009, at 12:48 PM, Henning Schulzrinne wrote:
As part of a research project, we are working on automated
diagnostics of network-related faults in residential, SOHO,
conference/special event, hotel and similar networks. If you have
observed errors that were hard for a lay person to diagnose, whether
due to end system problems, NATs, LAN or Internet issues, please
send me a brief description. (Also, contacts in tech support for
such environments would be most helpful, particularly if they might
be willing to talk to us.)
Henning
_______________________________________________
Ietf@xxxxxxxx
https://www.ietf.org/mailman/listinfo/ietf
Regards
Marshall
_______________________________________________
Ietf@xxxxxxxx
https://www.ietf.org/mailman/listinfo/ietf