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Multicast addressing in cluster

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Multicast addressing in cluster

Postby guest » Sun Nov 16, 2008 5:41 pm

> We followed the process to disable the Multicast as outlined in
> http://support.microsoft.com/kb/307962.
> This has eliminated the messages we were seeing in the System event logs
and
> everyone seems happy. I do think we need to follow up and isolate the
> heartbeat NICs onto their own VLANs

Yes, heartbeat/private networking must get its own VLAN

> to mitigate issues with cluster
> heartbeats.
>
> Thank you to everyone for their feedback.
> --
> Scott Wilson - PMP, MCP
>
>
> "Edwin vMierlo [MVP]" wrote:
>
> > I usually turn off Multicasting, see
http://support.microsoft.com/kb/307962
> > for settings.
> > Never had problems with turning it off
> >
> > rgds,
> > edwin.
> >
> >
> >
> >
> > > Separate VLANs will eliminate ANY possibility of conflicts - either
with
> > > traffic or with self-assigned addressing (it seemed that this was your
> > > ultimate concern - having multiple clusters HB NICs on the same VLAN
and
> > > getting the same multicast addresses self-assigned to separate
clusters).
> > > I'm not a multicast expert, but I believe there would be a mechanism
for
> > > determining in-use addresses prior to self-assigning.
> > >
> > > Again, hope this helped...
> > > --Ryan
> > >
> > > --
> > > Ryan Sokolowski
> > > MVP - Clustering
> > > MCT, MCITP x3, MCTS x7, MCSE x2, CCNA, CCDA, BCFP
> > >
> > >

> > > > You've answered the question perfectly. I'm not as concerned about
> > > > scalability as I am about the clusters having problems communicating
as
> > > > the
> > > > number of nodes and clusters increases. The suggestion that to
separate
> > > > each
> > > > cluster onto it's own VLAN is interesting. What problems will this
> > avoid?
> > > > Also, is assigning the multicast address manually a best practice?
> > > > Thanks.
> > > > --
> > > > Scott Wilson - PMP, MCP
> > > >
> > > >
> > > > "Ryan Sokolowski [MVP]" wrote:
> > > >
> > > >> Is the concern around scalability of the solution? Are you worried
> > about
> > > >> multiple clusters self-assigning the same multicast address(es)?
> > Couple
> > > >> of
> > > >> suggestions for you:
> > > >>
> > > >> First and foremost, I'd recommend configuring a separate VLAN for
each
> > > >> cluster's heartbeat traffic. Secondly, you could do manual config
of
> > the
> > > >> multicast addresses or you could handle this using a MADCAP server.
> > > >>
> > > >> Please let me know if I've missed your point - hope this helps,
> > > >> --Ryan
> > > >>
> > > >> --
> > > >> Ryan Sokolowski
> > > >> MVP - Clustering
> > > >> MCT, MCITP x3, MCTS x7, MCSE x2, CCNA, CCDA, BCFP
> > > >>

> > > >> > We have started to deploy Windows 2003 Server 64-Bit Edition
> > multinode
> > > >> > clusters to support SQL Server 2005 databases. The Private
network
> > for
> > > >> > all
> > > >> > nodes of all clusters are physically connected to a Cisco switch
> > > >> > configured
> > > >> > with a VLAN specifically for the cluster traffic. Each multinode
> > > >> > cluster
> > > >> > has
> > > >> > had the Multicast feature disabled following the procedures in:
> > > >> > http://support.microsoft.com/kb/307962/
> > > >> > As we add more multinode clusters to this private VLAN, I have a
> > > >> > question
> > > >> > regarding the Mulicast configuration we've chosen.
> > > >> > As the number of multinode clusters grow and the number of NICs
> > > >> > supporting
> > > >> > the Private network on the private VLAN grow, should we
reconsider
> > > >> > disabling
> > > >> > the Multicast feature and, instead, manually configure each node
with
> > > >> > it's
> > > >> > own multicast address (similar to configuring each Private IP
> > Address)?
> > > >> > --
> > > >> > Scott Wilson - PMP, MCP
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