2257467 - RSI at active site cannot connect to SRS at the standby site: Net-Lib protocol driver call to connect two endpoints failed - SRS 15.7.1 SP 135 in HADR

• RSI at the active site cannot connect to the SRS at the standby site.
• RSI at active site is getting a "Net-Lib protocol driver call to connect two endpoints failed" error:
  
  E. 2015/12/09 09:33:10. ERROR #1027 RSI(xxxxx) - seful\cm.c(6030)
  Open Client Client-Library error: Error: 84083972, Severity 5 -- 'ct_connect(): network packet layer: internal net library error: Net-Lib protocol driver call to connect two endpoints failed', Operating System error 10060 -- 'Failed to connect to the server - Error is 10060 A connection .
  E. 2015/12/09 09:33:10. ERROR #13045 RSI(xxxxx) - seful\cm.c(6035)
  Failed to connect to server 'xxxxx' as user 'xxx_RSI'. See CT-Lib and/or server error messages for more information.
  I. 2015/12/09 09:33:10. Trying to connect to server 'xxxxx' as user 'xxx_RSI' ......
  I. 2015/12/09 09:37:16. Still trying to connect to server 'xxxxx' as user 'xxx_RSI' ......
  I. 2015/12/09 09:41:22. Still trying to connect to server 'xxxxx' as user 'xxx_RSI' ......

• SAP Adaptive Server Enterprise (ASE) 15.7 with Always-on Option (HADR)
• SAP Replication Server (SRS) 15.7.1

network, firewall, Antivirus, port, Error: 84083972, Operating System error 10060,
, KBA , BC-SYB-REP , Sybase Replication Server (standalone) , Problem