Failover not working each time

Question

We have a 2 node rac on solaris 10, oracle 11.1.0.7.
We are executing the tests from the Rac Assurance Metalink test plan and find that our service and select query correctly fail over when we create an instance failure for database, for asm or when we have node failure. However the select query does not failover when we unplug all cables for public network or when we pull cables on private interconnect. In these cases we do see vip relocated, but select query hangs.
Below attached the service config and client tnsnames entry for sqlplus. Should service be 'preferred' on both nodes? And is TAF supposed to occur when we execute the network tests for public and private? Or are we only expecting client TAF when we have instance/node failure - and so the network interfaces are available on both nodes?
node2<oracle>srvctl config service -d tibcouat -s tibcouat_srv -S 9
#@=info: operation={config} config={full} ver={11.0.0.0.0}
tibcouat_srv PREF: tibcouat1 tibcouat2 AVAIL:
#@=service[0]: name={tibcouat_srv} enabled={true} pref={tibcouat1, tibcouat2} avail={} disabled_insts={} tafpolicy={BASIC} type={user}
#@=endconfig:
TIBCOUAT =
(DESCRIPTION =
(FAILOVER = ON)
(ADDRESS = (PROTOCOL = TCP)(HOST = node1-vip)(PORT = 1528))
(ADDRESS = (PROTOCOL = TCP)(HOST = node2-vip)(PORT = 1528))
(LOAD_BALANCE = yes)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = tibcouat_srv)
)

Answer 1

>
>
TIBCOUAT =
(DESCRIPTION =
(FAILOVER = ON)
(ADDRESS = (PROTOCOL = TCP)(HOST = node1-vip)(PORT = 1528))
(ADDRESS = (PROTOCOL = TCP)(HOST = node2-vip)(PORT = 1528))
(LOAD_BALANCE = yes)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = tibcouat_srv)
)In order to configure TAF, the TNS entry must include a FAILOVER mode clause that defines the properties of the failover as follows,
TYPE attribute defines the behaviour following a failure . Value : Session , select or none
METHOD attributes --> when connections are made to the failover instance. Value :basic or preconnect
RETRIES --> No of times that a connection should be attempted before returing an error.
DELAY --> the time in seconds between each connection retry.
e.g.
finance =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = myrac2-vip)(PORT = 2042))
(ADDRESS = (PROTOCOL = TCP)(HOST = myrac1-vip)(PORT = 2042))
(ADDRESS = (PROTOCOL = TCP)(HOST = myrac3-vip)(PORT = 2042))
(LOAD_BALANCE = yes)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = FINANCE)
(FAILOVER_MODE =
(TYPE = SELECT)
(METHOD = BASIC)
(RETRIES = 180)
(DELAY = 5)
Regards
Rajesh