Re: will gigabit ethernet help autonegotiation problems go away?


Allen McIntosh wrote:
Here's the output now that we've switched to the gigabit switches.
Web01 connects via eth1 to app01's eth0.

[Output omitted]

I don't have access to the original posting, but it looks like this is
only a 100 Megabit NIC, is that correct? I don't see any mention of 1
Gigabit anywhere, so if problems take longer to crop up with the new
switch, it's not because the traffic is moving faster.

I keep coming back to your statement that everything was fine if you
forced half duplex. Force half duplex, run for a good long while, and
save the results of ifconfig. Then reboot or unload/reload the driver
so the counts zero, allow autoneg or force full duplex, run for a while,
and save the results of ifconfig. Are any of the error counts non-zero?

Hi Allen,

These are all gigabit cabable NIC's. 82541GI/PI to be exact, on
SuperMicro X6DVA-EG motherboards. We also are having problems with
82540EM gigabit NIC's on a different SuperMicro motherboard.

Our switch was an unmanaged Netgear FS516 switch that we upgraded to a
gigabit switch just yesterday, on the advice of Redhat and SuperMicro.
Their reasoning was that even if there were autonegotiation problems,
that they should go away if we switch to a gigabit switch.
Unfortunately, they didn't go away, but just seem to happen less.

I will try what you suggested, but won't be able to for a while, since
I think we would need to switch back to the 10/100 switch to do what
you mentioned.

Yeah, the "everything fine when we ended up being in half duplex" seems
to be the key. We let it run for over 24 hours, and there were no
problems whatsoever. In autonegotiate under the 10/100 switch and
gigabit autonegotiate on the gigabit switch, we get problems at least
every hour. (And we tried two of each type of switch with no luck.)

Thanks,
-Michael

.

Relevant Pages

  • Re: bge driver autoneg failure and system-wide stalls
    ... > The switch is managed, and does gigabit. ... autoneg is working just fine. ... 100 half duplex, then 10 full duplex, and finally 10 half duplex. ...
    (freebsd-current)
  • Re: full/half duplex problem
    ... You can't have "fixed full duplex" in Gbit ethernet. ... it can be so that the Nortel switch will only autonegotiate ...
    (comp.unix.solaris)
  • Re: Digital switch over query
    ... > switch and, if necessary, upgrade the NICs in the PCs that are intended ... possible gigabit speed. ... possible out of whatever combination of link connections that arise in ... test results for FreeNAS and the Ubuntu server ...
    (uk.tech.digital-tv)
  • Re: probably an easy routing question, so please help
    ... plugged into the same gigabit switch as Server B in Block 2 and they ... from a 10Mb link to the router and the computers are both hooked into ... router with gig ports, you will potentially have limits for any ...
    (comp.dcom.sys.cisco)
  • Re: Network Transfer Slow....
    ... the NICs of the computers that were playing up (set to 100Mbps/full duplex). ... Our Network switch was set to autonegotiate (necessary in case somebody ...
    (microsoft.public.windowsxp.network_web)