Re: Apple Airport Express + DSP
As has been stated, the Airport express with a single ethernet port cannot provide DHCP over the ethernet port. It can be put into a bridge mode which allows you to connect through to your device in the same way as if you plugged an ethernet cable into the device.
If devices are assigned static IPs, then this will work just fine. If they are not, how were they getting their IPs? From what it sounds like, you plan to just plug in this access point whenever you need to make config changes. It would be the exact same thing as if you would have plugged in your laptop via ethernet without a DHCP server on the network.
For that sort of config, static IPs on your devices makes a huge amount of sense. Assign an address that's unique to each device. Personally, I'd use a class A network so that I can assign devices by type. (subnet 255.0.0.0) Eg, if you use a 10.a.b.c address as your company default, you can assign specific IP addresses to devices based on categories. You can then have 254 of each. Eg, 'a' could represent the company that you installed the gear in, 'b' could represent the type of gear, such as amps, dsp's, printers, etc, and then 'c' represents the number of that device. Your company laptop could then connect to other gear without having to change its IP address when you go to different installs that you put in. Having different company IDs isn't critical, but would be handy if you grabbed a device from one location to take to another in an emergency. It would guarantee no overlap in IP addresses, and devices would still work as expected.
