You have configured your eight-node cluster to use the GRID Naming Service (GNS). The network
administrator has established a delegated subdomain for the cluster, which is
MYCLUSTER.COMPANY.COM. DHCP has been configured as that the cluster now manages IP
addresses within it.
Select three responses that describe the VIPs that will exist in this configuration.
A.
1 GNS VIP
B.
3 GNS VIPs
C.
1 SCAN VIP
D.
3 SCAN VIPs
E.
3 Node VIPs
F.
8 Node VIPs
Explanation:
A: As part of the Grid Infrastructure installation process, optionally we can also
provide Grid Naming Service (GNS) information, which includes the GNS Sub Domain Name and
the GNS VIP Address.
Using GNS assumes that a DHCP server is running on the public network with enough available
addresses to assign the required IP addresses and the SCAN VIP. Only one static IP address is
required to be configured and it should be in the DNS domain.
D:
* The node VIP and the three SCAN VIPs are obtained from the DHCP server when using GNS.
* RAC instances register to SCAN listeners as remote listeners. Oracle recommends assigning 3
addresses to SCAN, which will create 3 SCAN listeners, though the cluster has got dozens of
nodes.. SCAN is a domain name registered to at least one and up to three IP addresses, either in
DNS (Domain Name Service) or GNS (Grid Naming Service). The SCAN must resolve to at least
one address on the public network. For high availability and scalability, Oracle recommends
configuring the SCAN to resolve to three addresses.
SCAN components in a cluster:
SCAN Name
SCAN IPs (3)
SCAN Listeners (3)
F:
* One VIP address for each node.
* Node listeners on each node which connect clients to the chosen instance – these listeners are
not normally contacted by the clients at the initial connection request and not referenced by the
REMOTE_LISTENER parameter except for upgraded RAC databases from prior releases. Each
local listener also has a vip and these are examples of “LOCAL RESOURCES” in the OCR.
* The node VIP and the three SCAN VIPs are obtained from the DHCP server when using GNS.