USing Separate VLANs for each Traffic in Vmware
If we decide to create separate VLANs for each traffic type in Vmware, would that really possible. Knowing that the most common Traffic types are:
- VM Network
- Management Network (host to host communication and host to Vcenter) including Management Traffic Host VMHA
-Vmotion traffic
- ISCSi storage Traffic.
If my ESX hosts are in Vlan 10, then if I put each traffic type in separate VLAN how can that be fast if they are in different VLANs than ESX Hosts…knowing that pretty much every traffic involve ESX hosts.
I believe the purpose of Traffic type separation into different VLANs , is performance in addition to security (as claimed to be)
Any help will be very much appreciated.
Thank you
- VM Network
- Management Network (host to host communication and host to Vcenter) including Management Traffic Host VMHA
-Vmotion traffic
- ISCSi storage Traffic.
If my ESX hosts are in Vlan 10, then if I put each traffic type in separate VLAN how can that be fast if they are in different VLANs than ESX Hosts…knowing that pretty much every traffic involve ESX hosts.
I believe the purpose of Traffic type separation into different VLANs , is performance in addition to security (as claimed to be)
Any help will be very much appreciated.
Thank you
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I am familiar with the Network Area…
If I am not wrong with physical switches L3 you can make make computers talk to each other without going through the router.
in Vmware :
You have one or many Virtual Standard switches (we are not talking vDS yet..to keep it simple)…
The Virtual Switch is Connected to Physial NICs (Vmnics)…Those Vmnics are the Trunk to the physical Switch (Network Switch or Storage Switch)
on Virtual Switch, you can create Vlans, but those Vlans need to have ports created and and assigned to the same Vlans on the physical switch Layer 3… this layer 3 physical switch is the one that routes between Vlans , because the Virtual Switch to my knowledge does not have the capability of routing.
Now that each Traffic is separated either by Vlans or by adding physical Nics and Vmkernel ports assigned to physical Nics, it still has to reach the L3 switch in order to be routed to another Vlan…. I believe though Adding physical Nics and Vmkernels and leaving all traffic in the same Vlan, will at least be able to avoid the routing process at the L3 physical switch, which means better performance.
That's pretty much my overall picture about how traffic move around in the Vmware Network.
Though Actually the physical Storage Switch, I am not sure if it works like the Physical Network Switch L3 I indicated.
If I am not wrong with physical switches L3 you can make make computers talk to each other without going through the router.
in Vmware :
You have one or many Virtual Standard switches (we are not talking vDS yet..to keep it simple)…
The Virtual Switch is Connected to Physial NICs (Vmnics)…Those Vmnics are the Trunk to the physical Switch (Network Switch or Storage Switch)
on Virtual Switch, you can create Vlans, but those Vlans need to have ports created and and assigned to the same Vlans on the physical switch Layer 3… this layer 3 physical switch is the one that routes between Vlans , because the Virtual Switch to my knowledge does not have the capability of routing.
Now that each Traffic is separated either by Vlans or by adding physical Nics and Vmkernel ports assigned to physical Nics, it still has to reach the L3 switch in order to be routed to another Vlan…. I believe though Adding physical Nics and Vmkernels and leaving all traffic in the same Vlan, will at least be able to avoid the routing process at the L3 physical switch, which means better performance.
That's pretty much my overall picture about how traffic move around in the Vmware Network.
Though Actually the physical Storage Switch, I am not sure if it works like the Physical Network Switch L3 I indicated.
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<<<According to vmware vlans offer logical separation, but does not solve traffic management problems.>>>
Maybe they mean, each traffic type ( Vmotion,VMHA,Management Network,VM Network) can travel on the same physical path, but in separated packets….. it is like shipping clothing,utensils,etc... through the same UPS cargo, but each item in separate box…
Maybe they mean, each traffic type ( Vmotion,VMHA,Management Network,VM Network) can travel on the same physical path, but in separated packets….. it is like shipping clothing,utensils,etc... through the same UPS cargo, but each item in separate box…
No - it is more like pushing cartman and lenny through same door...
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Thank you Guys
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I believe it is the same case for VM Network