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.
Configure the following addresses:
•A public IP address for each node
•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

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