Third NIC in SBS2003 for iSCSI

Andy Roxburgh

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Dec 17, 2009, 6:19:30 AM12/17/09

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Hi, I've got an SBS 2003 box which has two NICs - one facing the internet
and the other on a LAN. I've got ISA 2004 running on it too.

I want to attach a third NIC to allow me to use a NAS box via iSCSI.

However when I install the third NIC and enable it (on a different subnet to
the LAN), the LAN loses internet connectivity and I can't see the NAS unit
either.

LAN NIC is 10.0.0.x / subnet mask 255.255.255.0
NAS NIC is 10.0.1.x / subnet mask 255.255.255.0

What steps am I missing?

Any suggestions appreciated.

Andy

Monkeymagic25

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Dec 17, 2009, 11:55:06 AM12/17/09

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Hi Andy

Is there any reason why you would require the NAS on a different
subnet?
I have an SBS 2003 server with single nic running really well with a
SQL Box and an Iscsi SAN without any issues on speed at all.

You should get good connectivity if you are all connected up to a
1Gbps switch through the single internal Nic.

Steve Foster

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Dec 18, 2009, 11:19:59 AM12/18/09

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Andy Roxburgh wrote:

Well, ISA2004 is of course interested in the configuration of each NIC,
and knows about the various networks. But if the NIC detail, and ISA don't
agree correctly, loss of connectivity is the likely outcome.

I would be inclined to use a completely distinct range for the third NIC
(ie one of the other private ranges - 192.168.x.x or 172.15-31.x.x) just
to be safe (also less chance of you getting confused).

You should also unbind any unnecessary protocols and clients from the NIC
- I doubt it'll need Client For Microsoft Networks, for example. Make sure
it's below the internal NIC in the network binding order (Network
Connections > Advanced menu > Advanced Settings).

You'll need to define a network for this NIC in ISA, and set appropriate
rules for it too. The SBS wizards relating to connectivity (CEICW, etc.)
don't work well with 3 NICs either, so any time you need to run those,
you'll have manual work to do as well.

--
Steve Foster
------------
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Andy Roxburgh

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Dec 23, 2009, 11:41:28 AM12/23/09

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"Monkeymagic25" <dom...@jgg.co.uk> wrote in message
news:2b34de27-dde3-46e8...@j4g2000yqe.googlegroups.com...

> Hi Andy
>
> Is there any reason why you would require the NAS on a different
> subnet?

I'm told it's good practice to isolate the SAN from the LAN - I know that
it's usual with SBS2008 to have everything through the same NIC, I guess
isolating them 'feels' better to me than otherwise.

> I have an SBS 2003 server with single nic running really well with a
> SQL Box and an Iscsi SAN without any issues on speed at all.

> You should get good connectivity if you are all connected up to a
> 1Gbps switch through the single internal Nic.

I'm using 1gig NICs and switches but plan to upgrade the SAN to 10Gig
Ethernet when the price of NICs become a bit more reasonable!

Andy Roxburgh

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Dec 23, 2009, 11:43:43 AM12/23/09

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Hi Steve - thanks. Followed your advice and all sorted now. I had thrown a
spanner in the works by specifying two different default gateways on the LAN
and SAN NICs. So when the SAN was enabled, ISA routed all network traffic to
the SAN.

Anyway all sorted now - thanks for the invaluable help!

Andy

"Steve Foster" <steve....@picamar.co.uk> wrote in message
news:xn0gj1uck...@msnews.microsoft.com...