MultiSubnet Failover with RegisterAllProvidersIP 1Adding a distributor for availability groupsMulti Subnet...

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MultiSubnet Failover with RegisterAllProvidersIP 1


Adding a distributor for availability groupsMulti Subnet Availability Group IP Requirement for Windows Failover ClusterDistributed Availability groups & ListenersServices Cannot Connect to Multi-Subnet Availability Group After FailoverAvailability Groups using Multi-Subnet Clustering: Preferred Owners for Roles and Possible Owners for AG Listener IPsadding node to existing availability groupAvailability Groups using Multi-Subnet Clustering: AG listener failed pingMixing 2 and 3 node AG on a single WSFC?Performance gain with MultiSubnetFailover for single subnetListener IP not changing after failover













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I am using a 2 node SQL AG (2014 EE) (each on a different subnet) and the Listener is configured with 2 Static IPs. The client application uses SQL Native Client 11.4.
My understanding is that this driver is legacy and hence should not support failover with RegisterAllProvidersIP as 1 and default HostRecordTTL( 20 minutes).
Although I am unable to failover when RegsiterAllProvidersIP is 0 and TTL is 20 minutes (I am able to when TTL is lowered to say, 2 minutes), the application successfully fails over with RegisterAllProvidersIP set as 1.
According to the blog here, https://blogs.msdn.microsoft.com/alwaysonpro/2014/06/03/connection-timeouts-in-multi-subnet-availability-group/
It is recommended to set RegisterAllProvidersIP to 0 and HostRecordTTL to 2 minutes to achieve failover, but in my case I found that it is not needed as I am able to failover with RegisterAllProvidersIP set as 1.
Am I completely missing the point of recommended settings from MS blog or my multi subnet setup has any issues?









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    0















    I am using a 2 node SQL AG (2014 EE) (each on a different subnet) and the Listener is configured with 2 Static IPs. The client application uses SQL Native Client 11.4.
    My understanding is that this driver is legacy and hence should not support failover with RegisterAllProvidersIP as 1 and default HostRecordTTL( 20 minutes).
    Although I am unable to failover when RegsiterAllProvidersIP is 0 and TTL is 20 minutes (I am able to when TTL is lowered to say, 2 minutes), the application successfully fails over with RegisterAllProvidersIP set as 1.
    According to the blog here, https://blogs.msdn.microsoft.com/alwaysonpro/2014/06/03/connection-timeouts-in-multi-subnet-availability-group/
    It is recommended to set RegisterAllProvidersIP to 0 and HostRecordTTL to 2 minutes to achieve failover, but in my case I found that it is not needed as I am able to failover with RegisterAllProvidersIP set as 1.
    Am I completely missing the point of recommended settings from MS blog or my multi subnet setup has any issues?









    share







    New contributor




    Shubha Lakshmi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























      0












      0








      0








      I am using a 2 node SQL AG (2014 EE) (each on a different subnet) and the Listener is configured with 2 Static IPs. The client application uses SQL Native Client 11.4.
      My understanding is that this driver is legacy and hence should not support failover with RegisterAllProvidersIP as 1 and default HostRecordTTL( 20 minutes).
      Although I am unable to failover when RegsiterAllProvidersIP is 0 and TTL is 20 minutes (I am able to when TTL is lowered to say, 2 minutes), the application successfully fails over with RegisterAllProvidersIP set as 1.
      According to the blog here, https://blogs.msdn.microsoft.com/alwaysonpro/2014/06/03/connection-timeouts-in-multi-subnet-availability-group/
      It is recommended to set RegisterAllProvidersIP to 0 and HostRecordTTL to 2 minutes to achieve failover, but in my case I found that it is not needed as I am able to failover with RegisterAllProvidersIP set as 1.
      Am I completely missing the point of recommended settings from MS blog or my multi subnet setup has any issues?









      share







      New contributor




      Shubha Lakshmi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      I am using a 2 node SQL AG (2014 EE) (each on a different subnet) and the Listener is configured with 2 Static IPs. The client application uses SQL Native Client 11.4.
      My understanding is that this driver is legacy and hence should not support failover with RegisterAllProvidersIP as 1 and default HostRecordTTL( 20 minutes).
      Although I am unable to failover when RegsiterAllProvidersIP is 0 and TTL is 20 minutes (I am able to when TTL is lowered to say, 2 minutes), the application successfully fails over with RegisterAllProvidersIP set as 1.
      According to the blog here, https://blogs.msdn.microsoft.com/alwaysonpro/2014/06/03/connection-timeouts-in-multi-subnet-availability-group/
      It is recommended to set RegisterAllProvidersIP to 0 and HostRecordTTL to 2 minutes to achieve failover, but in my case I found that it is not needed as I am able to failover with RegisterAllProvidersIP set as 1.
      Am I completely missing the point of recommended settings from MS blog or my multi subnet setup has any issues?







      availability-groups failover





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      Shubha Lakshmi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      asked 7 mins ago









      Shubha LakshmiShubha Lakshmi

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