Comments on: 11gR2 clients connect to the database using SCANs

By: Jaruwan

Jaruwan — Sat, 10 Dec 2011 06:51:56 +0000

Can I implement SCAN on the standalone 11gR2 server, in the case we convert to full rac later on so nothing will change on client connection.

By: Deepak

Deepak — Thu, 24 Nov 2011 10:21:28 +0000

Hi,
We had Oracle 11gR2 RAC in a SAN environment on Windows 2008 R2 platform. It is now a production server. Presently, we are using Crossover cables for the Private IP’s on the two node. My question is will my server will work if I use switch instead of crossover cable? My plan is to take a downtime and then change the cable. IS IT OK TO DO SO? or shall i continue as it is with crossover cable?

By: imran_fast

imran_fast — Sat, 19 Nov 2011 13:10:53 +0000

Dear!

I have two nodes cluster 11GR2 configured on windows.
On the second node sometimes the scan listner stops.

By: rajiv

rajiv — Thu, 03 Nov 2011 12:14:47 +0000

i have a 2 node RAC (11.2.0.2) with 2 databases on it. SCAN is installed and functioning. I want to have a listener for each database i.e. 2 different listeners. Is it possible?

By: Penny

Penny — Tue, 09 Aug 2011 08:01:06 +0000

Hi MVE,
I think we’re having a problem similar to Carlos’ above. I installed our first 11gR2 Windows Server 2008 R2 two-node cluster using 3 SCAN addresses. The 3 addresses have bound to one of the nodes and (Microsoft default!) registered them to resolve to that node name in DNS. Aargh! What should I have done during installation to prevent this happening?
Thanks in advance.

By: Mayank

Mayank — Tue, 05 Jul 2011 14:19:02 +0000

I have successfully installed 2 Node RAC with Database and its connecting now.(without GNS)

But now i see SCAN IP is defined only on one Node
+ASM1 /oravl01/oracle > srvctl config scan
SCAN name: indlinrac1, Network: 1/10.19.52.0/255.255.255.192/eth0
SCAN VIP name: scan1, IP: /indlinrac1.corp.amdocs.com/10.19.52.49

it will give output from node 1 only with ip 10.19.52.49

+ASM1 /oravl01/oracle > nslookup indlinrac1
Server: 10.19.164.84
Address: 10.19.164.84#53

Name: indlinrac1.corp.amdocs.com
Address: 10.19.52.49

missing SCAN IP in /sbin/ifconfig for second node

In my tnsnames.ora LOAD_BALANCE = OFF
So is it ok to add SCAN IP on second node now in /sbin/ifconfig

Or i should leave it like this and deliver to customer

By: Niko Koki

Niko Koki — Fri, 17 Jun 2011 22:21:35 +0000

hi mve,
thank you very much for the quick reply.
i really appreciate it.
have a great weekend.

By: MVE

MVE — Fri, 17 Jun 2011 19:21:32 +0000

@iresh
Not sure what the problem is. Please review ML Note: 887471.1 — it might help.

By: MVE

MVE — Fri, 17 Jun 2011 19:20:46 +0000

@Niko Koki
That’s not supported. SCAN and VIP must be on the same network.

By: Niko Koki

Niko Koki — Fri, 17 Jun 2011 18:55:00 +0000

hi,

i have a working 3-node 11g R2 with the GNS enabled to managed my SCAN.
the cluster is connected to a network with clients that could not reach the SCAN.

is it possible to bring up a new SCAN using different domain to serve the other network?
of course the IPs would be entirely different from the IPs on the existing SCAN.

thank you very much for any information you would share.