Article number
000003423
Affected Versions
All
Source Hypervisor
All
Target Hypervisor
All

Zerto Enterprise Architecture Connectivity Check

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Summary

When experiencing a disconnection between the Zerto components, the first step to troubleshoot the issue would be a network connectivity check.

Steps

1. Login to the production ZVM VM using RDP.

2. Use the following guide to enable telnet:
    https://social.technet.microsoft.com/wiki/contents/articles/22715.how-to-enable-telnet-in-windows-server-2012.aspx

3. Open Command Prompt (cmd) and perform the following:
              3.1 - Ping [DR ZVM IP]
              3.2 - Telnet [DR ZVM IP] 9081
              3.3 - Ping [Prod. VRA IP]
              3.4 - Telnet [Prod. VRA IP] 4005
              3.5 - Telnet [Prod. VRA IP] 4006
              3.6 - Telnet [Prod. VRA IP] 4009
              3.7 - Ping [Prod. vCenter IP]
              3.8 - Telnet [Prod. vCenter IP] 443
              *note: Repeat steps 3.4/3.5/3.6 from the Production ZVM to ALL relevant VRAs in Production Site.

4. Use the Putty application to connect to the Production VRA using the following KB: https://www.zerto.com/myzerto/knowledge-base/connecting-to-a-vra-via-ssh/

5. Perform the following on the Production VRA's Putty session:
              5.1 - Ping [Peer DR VRA IP]
              5.2 - Telnet [Peer DR VRA IP] 4007
              5.3 - Telnet [Peer DR VRA IP] 4008
          *note: Repeat steps 5.1/5.2/5.3  from Production VRAs to ALL relevant peer VRAs in DR site.

6. Zerto Virtual Manager is installed on Windows operating systems, and due to the variety and amount of security and system configurations Zerto support encounters daily, Windows Firewall should be taken into account as a possible fault point.
   When in the ZVM machine, please verify Windows Firewall has the proper rules to allow communication to go through unblocked.
   If need be, disable Windows Firewall and try the connection again, whether it be pairing or any connectivity issue the ticket was opened for.
   
   To do so, please perform the following:
   6.1 - Login to the production ZVM VM using RDP.
   6.2 - Click on Start -> Windows Firewall With Advanced Security -> Click Properties in the right pane.
   6.3 - You will notice 3 tabs on the properties page, one for each firewall mode; Domain Profile, Private Profile, and Public Profile. To disable Windows Firewall, make sure you disable it from this menu, and for all 3 profiles.

7. Login to the DR ZVM VM using RDP.

8. Use the following guide to enable telnet:
   https://social.technet.microsoft.com/wiki/contents/articles/22715.how-to-enable-telnet-in-windows-server-2012.aspx

9. Open Command Prompt (cmd) and perform the following:
   9.1 - Ping [Prod. ZVM IP]
   9.2 - Telnet [Prod. ZVM IP] 9081
   9.3 - Ping [DR VRA IP]
   9.4 - Telnet [DR VRA IP] 4005
   9.5 - Telnet [DR VRA IP] 4006
   9.6 - Telnet [DR VRA IP] 4009
   9.7 - Ping [DR vCenter IP]
   9.8 - Telnet [DR vCenter IP] 443
   *note: Repeat steps 9.4/9.5/9.6 from the Production ZVM to ALL relevant VRAs in Production Site.

10. Use the Putty application to connect to the DR VRA using the following KB: https://www.zerto.com/myzerto/knowledge-base/connecting-to-a-vra-via-ssh/

11. Perform the following on the DR VRA's Putty session:
              11.1 - Ping [Peer Prod. VRA IP]
              11.2 - Telnet [Peer Prod.VRA IP] 4007
              11.3 - Telnet [Peer Prod. VRA IP] 4008
          *note: Repeat steps 11.1/11.2/11.3  from DR VRAs to ALL relevant peer VRAs in the production site.

12. Check VRA's MTU following KB:
https://www.zerto.com/myzerto/knowledge-base/mtu-testing/

If all pings and Telnets have been successful, kindly open a case for Zerto Support including screenshots of all successful Pings and Telnets from previous steps.