HA design question

[Dranizz]

Presently, I have one SC per Host that is connected on my Production LAN. This SC has access to the DNS and to the gateway.

I have another SC for iSCISI wich is connected isolated pSwitchs that have no access what so ever on my production LAN. So, no DNS and no Gateway either.

The only thing present is a VCB proxy.

If I use HA on this iSCSI LAN by using the VCB proxy as the gateway (so HA can ping it to check isolation) but without a DNS on this LAN, would that work?

I just want to make sure HA does not trigger if gateway goes down.

Thanks

[AndreTheGiant]

I just want to make sure HA does not trigger if gateway goes down.

You can use das.isolationaddressX for this purpose:

http://kb.vmware.com/kb/1006421

PS: by defaul HA will use all your SC interface. So you have only to give another ping point.

Andre

[Dranizz]

I could use das.isolationaddress1 to let's say das.isolationaddress3 to give HA multiple IPs to ping before determining if it's isolated?

Would that be good?

[AndreTheGiant · Accepted solution]

Yes.

When I have few ESX nodes, I always use the 2 storage IP as additional test point.

Note the default gateway and additional addresses are tested only when a ESX is not reachable.

Andre

[Dranizz]

Well, yesterday my two hosts could communicate together, the only thing unreachable was the gateway, and somehow, HA manges to trigger the VMs shut down.

I wonder why.

[Troy_Clavell]

you can also use a vmotion NIC as an isolation address as well

das.allowVmotionNetworks – Allows a NIC that is used for VMotion networks to be considered for VMware HA usage. This permits a host to have only one NIC configured for management and VMotion combined.

http://www.yellow-bricks.com/ha-advanced-options/

[AndreTheGiant]

Do you have NIC redundancy on the vSwitch with the SC interface?

Andre

[Dranizz]

Andre: Yes, 2 pNics using Failover Explicit Order.

Troy: I already use that setting telling HA to use the SC that is on the production LAN.

Edit::: Sorry, troy, I thought you were talking about the das.allowNetwork0 parameter.