Hi,
Out ot 3 instances i have included the TNSNAMES.ORA for one of the service(ACC). Could u pls tell me how to modify this entry so as to work this instance in any one of the 4 Ips(192.168.26.10/11/12 and 13).Can I use more ADDRESS parameters here?

ACC.World =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.26.10)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = ACC)
)
)