Server_A is an AIX 5.3 server assigned 192.168.1.8.
TNS Ping to it's Oracle 9i DB instance was 120 msec.
A month later, Server_B with identical specs was built assigned 192.168.1.9.
Virtual IP 192.168.1.10 added to Server_A for "High Availability" reasons.
If Server_A goes offline, VIP will be re-assigned to Server_B manually. TNS Ping returns much slower response time of 2 secs to the VIP.
Tnsnames.ora file on the client where TNS Ping is issued uses HOST = 192.168.1.10 so I don't believe /etc/resolv.conf on the AIX is relevant.
What are some possible areas and conf files to investigate?
EDIT: Is there network bindings order in AIX? My experience is more on Windows Servers. I'd appreciate thoughts about this angle.
EDIT 2: Unfortunately, network switches & routers are managed by another team who is not cooperating. Good news is that application actually launches at comparable speeds with older server with lower HW specs. Old server: 4 Cores CPU / 32 GB RAM New server: 8 Cores CPU / 64 GB RAM
Initial testing describe in this post was done using Toad for Oracle >> Test Connections. https://blog.toadworld.com/2017/12/14/getting-to-know-the-three-methods-of-connecting-to-the-database-using-toad-for-oracle-tns-direct-and-ldap
It logs into the Oracle DB and returns Connection Time. It surprised me to see 140 msec vs. 2 secs on Old vs. New server. They're on the exact same subnet with same Default Gateway, network hops from client are identical. Ping ms times looks good on both mostly 0 ms.
I don't know how concerned I should be with the Connection Times posted by Toad for Oracle.