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May 9th, 2023 21:00

Failover Failed on PowerStore

Hi All,

I need any input from any experience friend here due of some failover test that I failed during my testing. Below is summary of my failover testing.

  • We have a PowerStore storage following the best practice for SAN connectiviy using iSCSI.
  • Node A and and Node B are connected to 2 TOR switch via port 1 and port 2 (on I/O module) following Dell best practive.
  • We have also bonded port 1 & 2 on powerstore and also on the Brocade switch using LACP. We did a connection test by removing the FC cable from each port one at a time to test whether VCenter was still up and it tested successfully.
  • But when we did a test to remove both the FC cable from port 1 & 2 from Node A at at the same time, all the VM were hung and seems that it did not failover to Node B as expected.

 My question is if both FC cable is removed from port 1 & 2 on Node A at the same time, will SAN connectivity get distrupted or will it failover to Node B? Kindly advise if anyone has any idea on this. Very appreciate any input from anyone here. Thank you.

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May 10th, 2023 10:00

Ideally it should not get disrupted and fail over to Node B.  You can connect to the bond ports 0 and 1 of 4-port card but it is not mandatory to connect unless you are not having additional appliance and configuring as cluster.

If you are using bond ports please make sure the physical connectivity and zoning in SAN switches are correct.

In your case, just an example, if you have 3 esxi hosts, you need to create 6 zones in Fabric A, 6 in FabriB. 

Example for Host 1 :

Fab A Zone members

Node_A_P0  ESXi1_Hba_P1

Node_B_P1 ESXi1_Hba_P1

Fab B 

NODE_A_P1, ESXi1_Hba_P2

NODE_B_P0, ESXi1_Hba_P2

I hope you did the same but just thought of sharing my experience.

Good Luck.

 

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