"Axel Neumann" <Axel.Neumann@epost.de> wrote in message
news:bvu49e$vfr7i$1@ID-55633.news.uni-berlin.de...
>
> "Nick Havard" <nick@nickhavardxyz.com> wrote:
> > Hi
> >
> > I have a small two node Sun Cluster 3 setup which is using two cross
over
> > cables for interconnects. I beleive the cross over cables are causing
some
> > issues and wish to change it to use switches/hubs that sit in the
middle.
> > For this I thik there are two options as below.
> > * Use two small hubs, one for each interconnect
> > * Use a single small switch for all interconnect cables
> >
> > My question is will the later option work, or will the cluster detect
> > incorrect traffic on the interconnects (i.e. have confusion between each
> > interconnect "channel") and give me more problems than it would solve,
or
> > would the switch sort itself out and isolate the network traffic on each
> > interconnect. The second option is my preferred as it requires only a
> single
> > power socket and one device. As this is only a play cluster I'm not too
> > concerned about single point of failure etc.
> >
> > Thanks for your help.
> >
> > Regards
> >
> > Nick
> > nick@nickhavardxyz.com
> >
> > P.S. Remove xyz to reply
> >
> Hi,
>
> If the cluster is covered by a support contract from Sun you have to use
two
> switches. A single switch solution is not supported.
>
> HTH,
>
> Axel Neumann
>
>
Hi

No the cluster definitely isn't under support. It's a small cluster of an
Ultra-5 and Ultra-10 with some Multipacks for shared storage that I use for
"working" and learning on at home. Thus I'm not bothered about having
component reliability etc.

One of the problems I seem to have is that is I take one node down etc, it
causes problems at the other node (sometimes crashing it), which I beleive
is due to the loss of a cluster interconnect at the interface. Therefore by
using a switch or hub I would eliminate this as the node that remains, the
interconnect interface would still beleive it was connected to a network.

If I could use a single switch for all four interconnect interfaces, it
would suit me as IO have far to many power sockets in use already. However
I'm not sure if a switch would isolate the interconnect traffic between the
two interconnect channels in a satisfacory manner, or would the cluster
detect inappropriate traffic on each interconnect (as it would with a single
hub) and have additional problems.

Regards

Nick
nick@nickhavardxyz.com

P.S. Remove xyz to reply