Dominik Klein wrote:
> Hi
>
> I use heartbeat 2.0.7 from openSuSE 10.2
>
> 10.250.250.27 is master
> 10.250.250.28 is backup
> They are connected with direct ethernet cable
>
> When watching UDP heartbeats with tshark, my master machine says this
> (checksum errors):
> 16:27:24.140509 10.250.250.28 -> 10.250.250.27 UDP Source port: 32779
> Destination port: 694
> 16:27:24.186876 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694 [UDP CHECKSUM INCORRECT]
> 16:27:25.140610 10.250.250.28 -> 10.250.250.27 UDP Source port: 32779
> Destination port: 694
> 16:27:25.178983 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694 [UDP CHECKSUM INCORRECT]
> 16:27:26.144709 10.250.250.28 -> 10.250.250.27 UDP Source port: 32779
> Destination port: 694
> 16:27:26.179085 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694 [UDP CHECKSUM INCORRECT]
> 16:27:27.144811 10.250.250.28 -> 10.250.250.27 UDP Source port: 32779
> Destination port: 694
> 16:27:27.179183 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694 [UDP CHECKSUM INCORRECT]
> 16:27:27.179503 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694 [UDP CHECKSUM INCORRECT]
>
> My backup machine says this (no checksum errors):
> 16:27:24.035730 10.250.250.28 -> 10.250.250.27 UDP Source port: 32779
> Destination port: 694
> 16:27:24.082279 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694
> 16:27:25.035783 10.250.250.28 -> 10.250.250.27 UDP Source port: 32779
> Destination port: 694
> 16:27:25.074332 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694
> 16:27:26.039835 10.250.250.28 -> 10.250.250.27 UDP Source port: 32779
> Destination port: 694
> 16:27:26.074381 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694
> 16:27:27.039904 10.250.250.28 -> 10.250.250.27 UDP Source port: 32779
> Destination port: 694
> 16:27:27.074430 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694
> 16:27:27.074680 10.250.250.27 -> 10.250.250.28 UDP Source port: 32776
> Destination port: 694
>
> When backup becomes master, this situation does not change, so is not
> dependant on master/backup status.
>
> master and backup are identical hardware, both use openSuSE 10.2, Intel
> Primergy RX300 and Dell 82541GI/PI Gigabit Ethernet controllers.
>
> I tried using ucast and bcast heartbeats, both show checksum errors from
> master machine.
>
> Is this something to worry about and what can be done about it?
That's an awful lot of bad packets, it seems to me.
My best guess is that it's a hardware problem.
It's difficult to say which side is at fault, except by trial and error.
In theory it could also be a poor quality crossover cable. Gigabit
needs cat5E or preferably cat6.
I'd suspect active components first - unless your crossover cable is
long, or your environment is electrically noisy.
Of course, since I work for IBM, I could think of ways to solve your
problem with IBM hardware ;-)
--
Alan Robertson <[EMAIL PROTECTED]>
"Openness is the foundation and preservative of friendship... Let me
claim from you at all times your undisguised opinions." - William
Wilberforce
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