FW: Using multiple NICs for Oracle dNFS

  • From: "Hameed, Amir" <Amir.Hameed@xxxxxxxxx>
  • To: <oracle-l@xxxxxxxxxxxxx>
  • Date: Wed, 28 Mar 2012 14:05:21 -0400

Response from Matt.

-----Original Message-----
From: Zito, Matthew [mailto:Matt_Zito@xxxxxxx] 
Sent: Wednesday, March 28, 2012 1:58 PM
To: Hameed, Amir
Subject: RE: Using multiple NICs for Oracle dNFS

If you could forward my response to the list, I'd appreciate it, as
somehow my posting to the list is broken.

The short answer is that they can be in the same VLAN, but different
*logical* networks, or different VLANs and different networks.

The longer answer is that you need something like

Nic0 -
Nic1 -

And on the filer:

Nic0 -
Nic1 -

You can have them on the same VLAN or different, it doesn't really
matter at this point.  If they're on the same network, so, for example: is nic0 and is nic1, the box will not properly
load balance traffic  between the two networks.

When you say traceroute, what does the output look like?  If you're
expecting to get 10gb speeds, you really need to make sure that there
are no routers in between your filers/NAS heads and your database


Matthew Zito
Product Development Architect
BMC Software

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Hameed, Amir
Sent: Wednesday, March 28, 2012 1:52 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Using multiple NICs for Oracle dNFS

When configuring multiple NICs (two in our case) for dNFS per RAC
server, do all NICs need to be in the same VLAN (assuming that private
dedicated VLANs are used) or does each NIC need to be in its own private

We have configured two 10GbE NICs in a private VLAN on each RAC node.
However, when I run trace-route (these are Solaris boxes) from the dNFS
NIC IPs to the NAS IP, trace-route works fine on one NIC and not on the
other and this behavior is consistent on all RAC nodes where trace-route
is working fine on one of the NICs and not on the other. Our networking
people are not able to figure out what is causing it. Our Unix people
believe that if multiple NICs are part of the same VLAN then the traffic
will go out (to NAS) only from one NIC but will be received by both NICs
(from NAS). I am not a networking expert and would appreciate if anyone
can provide some feedback.







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  • » FW: Using multiple NICs for Oracle dNFS - Hameed, Amir