ISCSI Connection Failure Causing ESXi 5.1 VMs to shutdown

Hi all,

 

Was hoping someone may have seen the problem we have encountered over the last 2 weeks.

Our VMs are performing unexpected shutdowns. Our Exchange server has rebooted twice today :(

 

The timing of the shutdown matches with information we are seeing the Equallogic logs:

Severity  Date and Time          Member    ID                        Message                                                                                                                                                                                                                                                                                                   
--------  ---------------------  --------  ------------------------  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 
 INFO     26/07/2013 9:35:19 AM  APCEQLM1  7.2.15 | 7.2.24 | 7.2.29  iSCSI session to target '192.168.43.12:3260, iqn.2001-05.com.equallogic:4-52aed6-c7ca4349e-87b00217be35059e-lon-prod-vm-1' from initiator '192.168.43.31:58797, iqn.1998-01.com.vmware:apcesxhost1-24c73c18' was closed. | iSCSI initiator connection failure. | No response on connection for 6 seconds. 

 

We have 1 PS4100X, running the latest EQL firmware 6.0.5. We have 2 stacked Powerconnect 6224 switches. Our array and switches were configured by DELL support.

 

We have followed DELL recommendations on connecting vSphere to ISCSI storage. As far as I can see our vSwitches are configured correctly.

 

Anyone has any ideas why we're seeing this behavior ? I've logged this with DELL support but thought I'd ask on the forums in case anyone has experience this issues.

 

Thanks in advance!

 

Lee