What is the correct way to create a bridged interface with DHCP in this scenario

[Trel]

LAN and OPT1 are my interfaces.
I want to bridge them (and possibly later add OPT2).

What's the proper way to do this and have a DHCP server (which interface should it ideally run on)?

[stephenw10]

The dhcp server should run on the bridge interface.

This might help you: http://forum.pfsense.org/index.php/topic,48947.msg269592.html#msg269592

Stve

[Trel]

@stephenw10:

The dhcp server should run on the bridge interface.

This might help you: http://forum.pfsense.org/index.php/topic,48947.msg269592.html#msg269592

Stve

Thanks, that looks quite helpful.
(Hope I don't lock myself out when I do this tonight)

One thing I want to clarify though
Could you possibly elaborate on what the purpose of this step is

2. Switch bridge filtering from the bridge members onto the bridge itself (assuming you don't need to apply firewall rules between devices on the bridge/switch). Go to System: Advanced: System Tunables: and edit the two values.
Change net.link.bridge.pfil_member to 0.
Change net.link.bridge.pfil_bridge to 1.
Apply these changes.

[stephenw10]

By default filtering is on the bridge member interfaces and not the bridge interface itself. If you are hoping to the use the interfaces like a switch, as you would on a soho router, you probably want one set of firewall rules to apply to all the bridged interfaces. Hence the system tunable change. If you don't do that then you need to add rules to each interface in the bridge.

It deppends how you are using the bridge. You can also have filtering both places if you want to.

Steve

[Trel]

@stephenw10:

By default filtering is on the bridge member interfaces and not the bridge interface itself. If you are hoping to the use the interfaces like a switch, as you would on a soho router, you probably want one set of firewall rules to apply to all the bridged interfaces. Hence the system tunable change. If you don't do that then you need to add rules to each interface in the bridge.

It deppends how you are using the bridge. You can also have filtering both places if you want to.

Steve

Ok, yes, then I would want to make that change.
Sounds good.  Thanks for the explanation.