Scan name resolving IP's in serial manner.

Hi,
we Added scan entry at DNS server, but when do a nslookup for the scan name before the cluster installation, showing the following manner. so please check and assist why resolving in serial manner, its not showing as normal one by one as documented on oracle notes.??? please confirm so will start the installation.
Our current setup output: (when using without domain)
nslookup rac-scan
looking DNS..
10.20.19.171,10.20.19.172, 10.20.19.173
nslookup rac-scan
looking DNS..
10.20.19.172, 10.20.19.173, 10.20.19.171
nslookup rac-scan
looking DNS..
10.20.19.173,10.20.19.171,10.20.19.172
Our current setup output: (when nslookup using with domain)
nslookup rac-scan.ex.com
looking DNS..
10.20.19.171,10.20.19.172, 10.20.19.173
nslookup rac-scan.ex.com
looking DNS..
10.20.19.172, 10.20.19.173, 10.20.19.171
nslookup rac-scan.ex.com
looking DNS..
10.20.19.173,10.20.19.171,10.20.19.172
oracle documented output below :-
nslookup rac-scan
Name: rac-scan.example.com
Address: 133.22.67.192
Name: rac-scan.example.com
Address: 133.22.67.193
Name: rac-scan.example.com
Address: 133.22.67.194

Hi,
I don't see any issue with your SCAN Name resolution. SCAN name should be registered in DNS and not in /etc/hosts.
Oracle documentation says, SCAN name should resolve to 3 unused IP Addresses in Round-robin fashion which is fine in your case.
Proceed with your installation.
Thanks
Deepak

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Unable to resolve scan name to an ip address

Hi All,
I am installing 11gR2 on RHEL-4.
My installing is getting on scan ip part.
Its giving me an error that unable to resolve scan name to an ip address.
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My /etc/hosts
vi /ect/hosts
127.0.0.1 localhost.localdomain localhost
#public
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10.10.1.2 rac2-priv.oracle.com rac2-priv
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The installation should run anyways i am putting scan ip entry in /etc/hosts file
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Your assistance is much appreciated in this regards.
Thanks and Regards,

Hi
Thanks for the help.
I have installed 11gr2 on centos 4.5.
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Status of Oracle Cluster Registry is as follows :
Version : 3
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Used space (kbytes) : 2220
Available space (kbytes) : 259900
ID : 1931872859
Device/File Name : +ocr_vote
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OCRVOTE1
OCRVOTE2
OCRVOTE3
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SCAN name could not resolve in Oracle 11g R2

Hi all,
I have a setup of 2 node with Solaris 10u8 machine for Oracle 11g R2 RAC.
I entered the scanip in windows DNS.
When i try to nslookup from solaris it is not getting resolved.But from the DNS it is getting resolved.
I have changed as nsswitch.conf file and created resolve.conf and entered the proper entries.
Please help me..
Regards
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Hi all
I resolved it.
Issue was my resolv.conf was named as resolve.conf.
I changed the file name as resolv.conf and the problem got solved.
Now i can resolve the scan ip through nslookup scan-name
Regards
Bobs

How to create a SCAN Name

I am upgrading an 11.1.0.7 RAC install to release 2 and am getting stymied at the need for a SCAN name. How is this set up? I see vague hand waving about DNS this and DHCP that but that isn't much help when I have a basic two-node RedHat cluster using the hosts file. I have searched the doc set and Googled with no luck. If someone could point me in the right direction I would be appreciative!

Null doesn't work.
From the docs:
1.3.2.2.1 IP Address Requirements for Manual Configuration
The public and virtual IP addresses must be static addresses, configured before installation, and the virtual IP addresses for each node must not currently be in use. Oracle Clusterware manages private IP addresses in the private subnet on interfaces you identify as private during the installation interview.
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•A virtual IP address for each node
•A single client access name (SCAN) configured on the domain name server (DNS) for Round Robin resolution to three addresses (recommended) or at least one address.
The single client access name (SCAN) is a hostname used to provide service access for clients to the cluster. Because the SCAN is associated with the cluster as a whole, rather than to a particular node, the SCAN makes it possible to add or remove nodes from the cluster without needing to reconfigure clients. It also adds location independence for the databases, so that client configuration does not have to depend on which nodes are running a particular database. Clients can continue to access the cluster in the same way as with previous releases, but Oracle recommends that clients accessing the cluster use the SCAN.
Note:
If you manually configure addresses, then Oracle strongly recommends that you use DNS resolution for SCAN VIPs. If you use the hosts file to resolve SCANs, then you must provide a hosts file entry for each SCAN address.
So much for not using DNS! I tried a hosts file entry for each SCAN address, it didn't work.
So much for RTFM...maybe I shoud tell them were to put the FM...
Mike
Edited by: mikerault on Sep 10, 2009 2:28 PM

Add new scan name

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I need it to simulate separation of environments .
thanks
S.

Sahar wrote:
a way to simulate two separate environments with different networksWhy? To achieve what? What is the network architecture? Why is routing not enabled and why does the cluster need to run on two distinct networks?
What needs separation? At what level? Wire packet level? Application/database level?
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SCAN name / DNS resolution

Hi All,
1). I have a SCAN name called "REFCCC-CLUSTER"
The same SCAN NAME above resolves via DNS as an ALIAS to: " REFCCC".
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thanks

Simply dig the DNS name..it should resolve 3 IP addresses.. that's all..
For example:
[root@rac2 log]# nslookup scan.freeoraclehelp.com
Server: 192.168.1.20
Address: 192.168.1.20#53
Name: scan.freeoraclehelp.com
Address: 192.168.1.25
Name: scan.freeoraclehelp.com
Address: 192.168.1.23
Name: scan.freeoraclehelp.com
Address: 192.168.1.24
[root@rac2 log]#
You can refer to http://www.freeoraclehelp.com/2011/09/11gr2-rac-scan-dns-bind-configuration.html for more details about DNS Setup.
HTH,
Raj Mareddi
http://www.freeoraclehelp.com

SCAN NAME

Hi,
i'm very new to oracle!!!
I've two RED HAT virtual with vmware.
i've run grid installation
i don't have private dns
i received this error:
INS-40719 "is already assign to another system"
but the IP that i use for the scan (10.0.75.147 RAC1.localdomain) is a free IP!!!
What should I put in SCAN NAME????
this is my resolv.conf:
; generated by /sbin/dhclient-script
search sorint.rm
nameserver 212.216.112.112
nameserver 208.67.222.222
this is my /etc/hosts:
#FISICI
10.0.75.200 nodo1 NODO1 nodo1.localdomain #eth0
10.0.75.201 nodo2 NODO2 nodo2.localdomain #eth0
#VIP ORACLE
10.0.75.250 nodo1-vip NODO1-VIP nodo1-vip.localdomain #eth1
10.0.75.251 nodo2-vip NODO2-VIP nodo2-vip.localdomain #eth1
#PRIVATA ORACLE
192.168.10.1 nodo1-priv NODO1-PRIV #eth2
192.168.10.2 nodo2-priv NODO2-PRIV #eth2
212.210.10.8 mail.sorint.it
10.0.75.147 RAC1.localdomain RAC1
127.0.0.1 nodo1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6

Hi;
I suggest close your issue here as answered than move your issue Forum Home » High Availability » RAC, ASM & Clusterware Installation which is RAC dedicated forum site.
Regard
Helios

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Follow or contact me at...
&nbsp&nbsp
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@rgoogld:
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Hi All,
I have installed 2 node RAC -11gR2 on ORACLE VM Server 2.2.1.
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I am using scan name in tnsnames.ora file. Also I have make scan name entry in /etc/hosts not in the DNS.
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(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = RWCORA-cluster-scan)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
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Hi,
I am trying to install Oracle 11gR2 RAC on VM ware and I got the INS-40922 (Invalid SCAN name). Do I need to create the SCAN name prior to the installation?
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I am getting this Error
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Edited by: Next Level on Sep 23, 2012 2:10 PM

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Hi
On the OUI Grid Plug and Play information page, you can configure GRID Naming service (GNS).
What will be the SCAN Name field default to if you enter cluster in SJI cluster name field and cluster01.example.com in the GNS Sub Domain field ?
Is it
cluster01.example.com
or
cluster01-qns.example.com
or
cluster01-scan.cluster01.example.com
or
cluster01-vip.example.com

I would go with option:C
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Check this out: http://www.freeoraclehelp.com/2011/09/oracle-11gr2-rac-installation-with-gns.html

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Host name resolved to an ipaddress please provide host name

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Thanks John,
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Scan name resolving IP's in serial manner.

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