Re: Subnet error message

Thanks for the article.

I do have have a hub in front of my nlb setup and all 4 nic are connect to
it. And the uplink is a Cisco switch with VLAN's.


"Rodney R. Fournier [MVP]" wrote:

> Got it - http://support.microsoft.com/kb/216333/en-us.
>
> And from eventid.net -
> Anonymous (Last update 1/23/2004):
> As per Microsoft:
> Error Message Explanation: The hosts in this cluster formed two or more
> separate clusters. This is usually caused by network partitioning that
> prevents the Network Load Balancing (NLB) heartbeats of one or more hosts
> from reaching all of the other hosts in the cluster. This event is logged
> when the network problem is corrected and the hosts converge back into a
> single cluster.
>
> User Action (Windows Server 2003): Investigate the cause of the network
> partitioning. No investigation of NLB is necessary.
>
> User Action (Windows 2000 Server): Investigate the cause of the network
> partitioning. No investigation of NLB is necessary.
>
> Eric Henderson (Last update 1/23/2004):
> See the link to M216333.
>
> Adrian Grigorof
> This message indicates a wrong configuration of Windows Load Balancing
> Service or a faulty network.
>
> Check your switch, are you using VLANs? Port Mirroring? Different switches?
>
> Cheers,
>
> Rod
>
> MVP - Windows Server - Clustering
> http://www.nw-america.com - Clustering Website
> http://msmvps.com/clustering - Blog
> http://www.clusterhelp.com - Cluster Training
>
> "Mario" <Mario@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:02C669AB-B68C-420E-8199-48E6358DFE43@xxxxxxxxxxxxxxxx
> > Event ID:18
> > Subnet mask: 192.168.100.10/255.255.255.0 - 192.168.200.20/255.255.255.0
> >
> > "Rodney R. Fournier [MVP]" wrote:
> >
> >> What is the error number? What is your subnet mask for each nic?
> >>
> >> Cheers,
> >>
> >> Rod
> >>
> >> MVP - Windows Server - Clustering
> >> http://www.nw-america.com - Clustering Website
> >> http://msmvps.com/clustering - Blog
> >> http://www.clusterhelp.com - Cluster Training
> >>
> >> "Mario" <Mario@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> >> news:5F6452AD-051A-481F-87E4-B54C3D88D2A7@xxxxxxxxxxxxxxxx
> >> > Thanks for clarifying. But my NLB is up and running. What I need is why
> >> > am
> >> > I
> >> > getting this error in the Event Log.
> >> > ** Duplicate cluster subnet detected.The network may have been
> >> > inadvertently
> >> > partitioned
> >> >
> >> >
> >> > "Rodney R. Fournier [MVP]" wrote:
> >> >
> >> >> The nic that does cluster traffic is the NLB nic. They are one in the
> >> >> same.
> >> >>
> >> >> With two nics, you can setup one for NLB and other one for
> >> >> Administrative/Internal network connectivity.
> >> >>
> >> >> Cheers,
> >> >>
> >> >> Rod
> >> >>
> >> >> MVP - Windows Server - Clustering
> >> >> http://www.nw-america.com - Clustering Website
> >> >> http://msmvps.com/clustering - Blog
> >> >> http://www.clusterhelp.com - Cluster Training
> >> >>
> >> >> "Mario" <Mario@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> >> >> news:D3E129AF-5A78-42F4-9BC8-6D1A9AF564D5@xxxxxxxxxxxxxxxx
> >> >> > Sorry for the confusion. I mean one nic for cluster traffic the
> >> >> > other
> >> >> > nic
> >> >> > for
> >> >> > NLB.
> >> >> >
> >> >> > Event log error:
> >> >> > Duplicate cluster subnet detected.The network may have been
> >> >> > inadvertently
> >> >> > partitioned
> >> >> >
> >> >> > Any idear why the subnet error message???
> >> >> >
> >> >> > "Chuck Timon [Microsoft]" wrote:
> >> >> >
> >> >> >> Disable the NIC supporting the 'heartbeat' traffic as there is no
> >> >> >> such
> >> >> >> think
> >> >> >> as having a seperate network for NLB heaertbeats. All NLB traffic
> >> >> >> goes
> >> >> >> over
> >> >> >> the NIC configured for NLB. After disabling the 'heartbeat' NIC,
> >> >> >> does
> >> >> >> NLB
> >> >> >> work?
> >> >> >>
> >> >> >> --
> >> >> >> Chuck Timon, Jr.
> >> >> >> Microsoft Corporation
> >> >> >> Beta Engineer
> >> >> >> This posting is provided "AS IS" with no
> >> >> >> warranties, and confers no rights.
> >> >> >>
> >> >> >> "Mario" <Mario@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> >> >> >> news:BA81DC1E-C408-46D7-8F56-05FF3F9FE52B@xxxxxxxxxxxxxxxx
> >> >> >> > Hi,
> >> >> >> >
> >> >> >> > I do have a unique IP for all my nic, any idear on the subnet
> >> >> >> > error???
> >> >> >> >
> >> >> >> > "Rodney R. Fournier [MVP]" wrote:
> >> >> >> >
> >> >> >> >> NLB does not have a heartbeat network (unless you are talking
> >> >> >> >> about
> >> >> >> >> NLB
> >> >> >> >> within ISA 2004). Either you have NLB turned on and uses that
> >> >> >> >> network,
> >> >> >> >> or
> >> >> >> >> you don't have NLB turned on. If it's not turned on, you have to
> >> >> >> >> have
> >> >> >> >> unique
> >> >> >> >> IPs.
> >> >> >> >>
> >> >> >> >> Cheers,
> >> >> >> >>
> >> >> >> >> Rod
> >> >> >> >>
> >> >> >> >> MVP - Windows Server - Clustering
> >> >> >> >> http://www.nw-america.com - Clustering Website
> >> >> >> >> http://msmvps.com/clustering - Blog
> >> >> >> >> http://www.clusterhelp.com - Cluster Training
> >> >> >> >>
> >> >> >> >> "Mario" <Mario@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> >> >> >> >> news:4FE6522E-8363-458F-864B-690432403E09@xxxxxxxxxxxxxxxx
> >> >> >> >> > Hi,
> >> >> >> >> >
> >> >> >> >> > Am running NLB on 2 Win2003 Server with 2 nic in each of them
> >> >> >> >> > with a
> >> >> >> >> > hub
> >> >> >> >> > in
> >> >> >> >> > front of it. One Nic does cluster traffic only on
> >> >> >> >> > 192.168.200.X
> >> >> >> >> > and
> >> >> >> >> > the other nic does the actual NLB on 192.168.100.X.
> >> >> >> >> >
> >> >> >> >> > Am getting this error in the event log: Duplicate cluster
> >> >> >> >> > subnet
> >> >> >> >> > detected.
> >> >> >> >> > The network may have been inadvertently partitioned.
> >> >> >> >> >
> >> >> >> >> > Thank you for your help.
> >> >> >> >>
> >> >> >> >>
> >> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >>
> >> >>
> >> >>
> >> >>
> >>
> >>
> >>
>
>
>
.

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