[Veritas-ha] MultiNICA & IPMultiNIC

[David McWilliams]

Thanks for the reply. I wasn't aware of the need for a dedicated
offline interface, but I can live with it. The real need is to be able
to access the database across gigabit from the main machine, as
specified in the docs, and across 10/100 from the failover, because
they won't spring for a new card. The reason that the failover
interface is on a different subnet was to allow maximum bandwidth over
10/100 in a failover scenario. I can lose it if needs be.

When you localise a resource does it appear differently in the main.cf
file or does the hares command effect some different config file? would
it help if I threw the gigabit ip's onto the main corporate subnet,
even although I am using a crossover cable which means that I can never
talk between the gigabit and 10/100 interfaces.

Cheers,

David

--- Jim Senicka <jsenicka at veritas.com> wrote:
> Ok,
> a bit of confusion here...
> 
> First, a MultiNICA setup requires a dedicated, offline
> standby interface. So you cannot fail from your Gig to your active
> public net, unless you plan on having an offline interface on
> the public subnet.
> 
> Second, James was right on, you will need to localize
> the NIC resource since it is on a different subnet.
> 
> Then third, why is the standby box on a different net?
> Seems to be adding confusion and complexity.
> 
> Basically:
> Degree of HA = High - (confusion X complexity)
> 
> 
> -----Original Message-----
> From: James Mello [mailto:kingjamm at colltech.com]
> Sent: Wednesday, October 03, 2001 8:18 AM
> To: davidmcw at bigfoot.com
> Cc: Veritas-ha at mailman.eng.auburn.edu
> Subject: Re: [Veritas-ha] MultiNICA & IPMultiNIC
> 
> 
> > I have a couple of NIC's in both the main & failover boxes. I would
> > like to mount the oracle share from the NetApp across a gigbit
> > interface from the main box, but the failover box only has a qfe
> card
> > for mounting the NetApp. I know that gigabit is recommended but the
> qfe
> > is only for failover purposes and would be a short term
> implementation.
> > the gigabit on the Sun and the NetApp mount across a gigabit
> crossover
> > cable on a 192.1.0 subnet (255.255.255.0), the failover machine
> mounts
> > the NetApp across a standard cat5 cable across 192.2.0 subnet
> > (255.255.255.248). They can both access the NetApp across the
> corporate
> > network if they have to, 10.0.4 (255.255.252.0). Can I use
> MultiNICA &
> > IPMultiNIC to achieve the desired mounts from both, while also
> failing
> > back onto the 10.0.4 card.
> 
> First things first, since there is only one card on the system, you
> won't
> need to use the multinica resource or IPMultiNIC resource type. They
> are
> used for failover of cards on the system, not for failover between
> machines.
> 
> Now with that said, you can still get the desired results by using a
> directive to hares called 'local' to set the driver and other
> information
> specific to a card. If you're a command line geek here is an example.
> 
> hares -add myres res somegroup
> hares -local myres
> hares -modify myres attribute 1 -sys system1
> hares -modify myres attribute 2 -sys system2
> 
> In your specific case you can create a NIC resource, localize the
> device. Then for the IP, localize the netmask and you should be ready
> to
> go.
> 
> I've gotta run, but if you have further questions, I'm sure that you
> can
> ask the list again for more help. :)
> 
> 	-- Cheers
> 	-- James
> 
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=====
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