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Bridged or Nat in ESX 3.5

Posted on 2009-12-28
Medium Priority
Last Modified: 2012-05-08
I was wondering if someone can clarify if the "bridged or Nat" exists on VMWare ESX 3.5? It's my understanding that in ESX you create NIC's and then assign them to Network or VLANS. So I don't know how "bridged or Nat" comes into play here.  
Question by:llarava
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Expert Comment

by:Bryan Butler
ID: 26131813
LVL 16

Expert Comment

by:Bryan Butler
ID: 26131880
Ooops.  Posted to wrong question.  Please delete/ignore that comment:

Does either of these help?...
LVL 16

Expert Comment

by:Bryan Butler
ID: 26131908
Bridged or NAT comes in with the local network of the VMs.  If you use NAT, the vmware host creates it's own local network using a DHCP and 192.x.x.x address range.  For bridged, it's like it's connected to the same network the host is connected to and you can use DHCP/static/vlans/etc.  
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Author Comment

ID: 26131994
I know but that is part of VMWare workstation. I haven't seen this as part of VMWare ESX
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Assisted Solution

laneduncan earned 400 total points
ID: 26132229
ESX doesn't offer any DHCP services built-in; it just sets up a network card.
If you want to set up some NAT/DHCP services on ESX, you have to provide those services.  Happily, there's a free and pretty easy way to do it.

This blog post provides pretty good instructions for setting up Smoothwall to do just this.  http://blog.ust.hk/martinl/2009/03/25/smoothwall-express-as-nat-on-esxi/

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Accepted Solution

ryder0707 earned 1600 total points
ID: 26133565
ESX dont use the term bridge but it uses vSwitch, bridge and switch is very much alike, basically a switch being a bridge with many ports
In ESX a single or multiple physical NICs can be assigned to a vSwitch creating a virtual switch for all VMs & port groups to connect to

esx dont have NAT services, but you could use physical NAT device(eg. physical cisco router) or soft NAT device a VM that is created on the esx host itself and installed with specific routing/firewall OS(eg. Smoothwall or IPCop) and VMs must use the existing vSwitch to reach the NAT device
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Expert Comment

by:Bryan Butler
ID: 26133783
DOH!  So please just ignore all my comments then.  Sorry about that.  Though I'd try to answer since I messed up and...bang...my DOH shows up again.

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