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How many virtual IPs do I need in cluster server

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How many virtual IPs do I need in cluster server

Postby guest » Sun Nov 16, 2008 5:36 pm

> Thanks, that's helpful.
>
> To get the right kind of private IP assigned to the Cluster IP, can anyone
> tell me how it is used? Does it only have to talk to the other node?
(Isn't
> that what the heartbeat is for?)

what do you mean with private IP ?

my definition of a private IP is according to RFC1918 (
http://www.isi.edu/in-notes/rfc1918.txt )
it is in the 10.x or 172.16.x or 192.168.x ranges as defined in that RFC

other than that it is fully routable network (on your company's network) and
to be treated as such, it just won't get routed over the internet.
setting it up in a cluster is exactly the same as you would setup any other
network.

Please let us know what you mean with private IP, as I think we are talking
about something different here.

Rgds,
Edwin.


>
> -Karen
>
> "Edwin vMierlo [MVP]" wrote:
>
> >
> >
> > > Thanks... so are you saying that I have to have a virtual IP in a
Cluster
> > > Group and *another* virtual IP in the application resource group
(Group
> > 0)?
> >
> > Yes
> >
> > >
> > > We have deployed an application (with it's own physical disk) already
> > > through a 2-node cluster in the Cluster Resource Group. It depends on
the
> > IP
> > > & Network Name and therefore I coudln't put the App in Group 0,
because it
> > > won't allow dependencies across groups.
> >
> > You should never install an application in the default "Cluster Group"
> > - Break the dependencies
> > - create a separate group with disk/IP/network name
> > - install your application there (you can move it, but you must ensure
that
> > data is moved to the disk in your new group as well, all depending on
what
> > kind of application it is and per vendors instructions)
> >
> > >
> > > Our security (and networking) groups are very reluctant to assign
another
> > IP
> > > for the App unless they have very clear justification from me for
doing
> > so...
> > > So either I need clear justification & a plan, or an alternative.
> >
> > The justification is, you must assign an IP to the new group, this is
the
> > way cluster is designed to work.
> > Any clustered application (exchange, sql, fileserving, printserving,
> > anything !!! really !) is working this way.
> >
> > no alternatives, it is by design, every cluster in the world works this
way.
> >
> >
> > >
> > > Can we assign nonroutable private addresses to the virtual cluster IP,
I
> > > guess like the heartbeat (we're using a crossover cable there,
though)?
> >
> > sure, as long as your clients can connect to your application, it must
be a
> > valid IP address in a subnet of the NIC's in the nodes.
> >
> > >
> > > I have 2 dual-port NICs in the machine. NIC #1 has one port assigned
to
> > the
> > > node IP and virtual cluster IP. NIC#2 has 1 port assigned to the
hearbeat
> > > (crossover cable). So I have 2 more NIC ports free... Would I utilize
one
> > of
> > > them for an application IP, or would can it use the same port on NIC#
as
> > the
> > > existing IP's?
> >
> > Take a NIC "port" you do not use, hook it up to your network, configure
a
> > valid IP address. Test that you have network connection on this NIC,
then
> > add an IP address resource to your cluster on the same subnet as the
valid
> > IP address configured for your NIC
> >
> >
> > HTH,
> > Edwin.
> >
> >
> >
> >
> > >
> > > Thanks,
> > > Karen
> > >
> > > "Russ Kaufmann" wrote:
> > >

> > > > >I have clustered an application inside the cluster group but then
read
> > that
> > > > > Microsoft does not recommend that. Do I need to assign a routable
> > address
> > > > > as
> > > > > the Cluster IP and then another as the Application IP in order to
have
> > a
> > > > > separate Application Resource?
> > > >
> > > > Yes. Every virtual server requires its own IP address and Network
Name
> > > > resources. If the application uses disk space to save data, the
> > application
> > > > will also probably require a physical disk resource.
> > > >
> > > > > Would both IP's reside on the same NIC?
> > > >
> > > > The IP will actually live on the node that is active with the
cluster
> > group
> > > > that contains the application.
> > > >
> > > > > Why is
> > > > > it not recommended to have the Application in the Cluster group?
> > > >
> > > > Why? I really can't give you an official answer, but I would assume
it
> > is
> > > > because we don't want anything screwing with the quorum disk.
Another
> > reason
> > > > would be that we want our applications to fail over granularly so
that
> > if
> > > > one app fails, it doesn't cause the other groups in the cluster to
also
> > > > failover.
> > > >
> > > >
> > > > --
> > > > Russ Kaufmann,
> > > > MCSE: Messaging and Security, MCT, MCITP, MCTS and other stuff
> > > >
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