You are facing the following error message while trying to start the listener after an Oracle upgrade from 18.104.22.168 to 12c:
hostname:ora<sid> > lsnrctl start
LSNRCTL for IBM/AIX RISC System/6000: Version 22.214.171.124.0 - Production
Starting /oracle/<SID>/121/bin/tnslsnr: please wait...
TNS-01198: Listener failed to initialize valid node list
NL-07010: failed to get subnet mask
NL-00408: cannot find or read value
- UNIX/Windows server
- Oracle RDBMS 12c
KBA , BC-DB-ORA , Oracle , BC-NET , Network Infrastructure , Problem
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