01-28-2013 04:49 AM
Hello,
I am taking care of a design involving nexus 1010 and a cluster of ESX ( for now two ESXs ).
We are going to use l3 control as there is a couple of firewalls between the nexus 1010 and the ESX hosts.
I don't have much knowledge about ESX so I have a question about the implementation of the VEMs on the ESX cluster :
My plan is to create a new vmk interface for l3 control on the ESX in the same subnet as the ESX management one.
My question is how many ip addresses for L3 control will I need for a cluster of 2 ESX ? My guess is that I need one vmk interface per ESX ( same as management ) but I haven't found any information about this so far, so I want to make sure it's the case.
Thank you
Regards
Baptiste
01-28-2013 08:36 AM
Do not put the new vmk interface on the same subnet as your mgmt vmk. Unfortunately VMware uses a single tcp/ip stack for the vmks and when it sees two vmks with the same subnet it doesn't always forward the traffic up the path you want. I would recommend migrating your mgmt vmk to the VEM module.If you don't want to do that then create a new vmk on a different subnet and assign that to the VEM. Be aware that if you do this you might need to create a static route on the ESXi host so that the new vmk knows how to get to the VSM.
If you have more questions let us know.
louis
01-28-2013 02:27 PM
Hello Louis,
thanks for your feedback. Using a new subnet won't be easy for me so I guess I will use the ESX management vmk that I will migrate to VEM.
Cheers
Baptiste
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