Databases Reference
In-Depth Information
If you wish to change your SCAN IP address information, you must first stop your cluster resources as outlined:
[grid@cm01dbm01 ~]$ srvctl stop scan_listener
[grid@cm01dbm01 ~]$ srvctl stop scan
Once down, you will need to modify the SCAN and
ora.net1.network
network. You will need to be logged in as
root
to perform these tasks:
[root@cm01dbm01 ~]# $CRS_HOME/bin/srvctl modify scan -n [
scan name
]
[root@cm01dbm01 ~]# $CRS_HOME/bin/srvctl modify network -S [
new network
]/[
new subnet mask
]/bondeth0
Next, modify the SCAN listener and the IP address information as the Grid Infrastructure owner and start your
SCAN listeners:
[grid@cm01dbm01 ~]$ srvctl modify scan_listener -u
[grid@cm01dbm01 ~]$ srvctl start scan_listener
When finished, validate your configuration:
[grid@cm01dbm01 ~]$ srvctl config scan
[grid@cm01dbm01 ~]$ srvctl config scan_listener
■
recipe 10-7 provides detailed information about how to change ip addresses on your exadata database
machine; changing sCaN network information is a piece of this process.
Note
How It Works
In Oracle 11gR2 Grid Infrastructure with Oracle RAC on Exadata, Oracle requires a Single Client Access Network and
SCAN listener to be created. The Grid Infrastructure installation will configure this and enable its network addresses
on the client access network on each compute node upon which it starts a SCAN listener. The IP addresses for your
SCAN listener must be registered in DNS as outlined in Recipes 6-2 and 6-3.
SCAN and SCAN listener configuration and management topics on Exadata are no different than on non-Exadata
11gR2 Grid Infrastructure environments. On Exadata:
•
On the X2-2, X3-2 Eighth Rack, and X3-2 Quarter Rack, three SCAN listeners, two running
one node and one running on the other node (if healthy), and a local listener running on the
VIP address
•
On the X2-2 and X3-2 Half Rack, three SCAN listeners, one running on three of the four
compute nodes, one compute node without a SCAN listener, and a local listener running on
the VIP address
•
On the X2-2 and X3-2 Full Rack, three SCAN listeners, one running on three of the eight
compute nodes, five compute nodes without a SCAN listener, and a local listener running on
the VIP address
•
On the X2-8 and X3-8 Full Rack, three SCAN listeners, two running one node and one running
on the other node (if healthy), and a local listener running on the VIP address
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