3577559 - HANA replication doesn't work and Secondary_Active_Status showing Connection timeout

HANA replication doesn't work. And from HANA Studio its observed from System Replication status overview the column 'SECONDARY_ACTIVE_STATUS' shows 'CONNECTION TIMEOUT' as does systemReplicationStatus.py.

Nameserver trace shows errors:  

[6124]{-1}[-1/-1] 2025-01-14 13:24:15.978949 e sr_nameserver    DRClient.cpp(01052) : Could not reach any host of site '2' to send request 'dr_gethdbversion'. Hosts: (<remote HANA host>:43106) Errors: 
nameserver communication error;internal error(5500)

[...]

[6124]{-1}[-1/-1] 2025-01-14 13:24:27.604512 e sr_nameserver    DRClient.cpp(01052) : Could not reach any host of site '2' to send request 'dr_replicatetopologyfromprimary'. Hosts: (<remote HANA host>:43106) Errors: 
nameserver communication error;internal error(5500)

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SAP HANA Platform edition 2.0

SAP HANA Platform edition 1.0 

system replication, Connection timeout, SECONDARY_ACTIVE_STATUS, replication status, signal 9, SIGINT, SIGQUIT, sapstart, systemReplicationStatus.py   , KBA , HAN-DB-HA , SAP HANA High Availability (System Replication, DR, etc.) , How To