must a AP have a IP ?

An AP, albeit bridge, must have an IP because:

  1. Must be able to contact the hotspot (or Internet) because it must synchronize the time via the SNTP client.
  2. the IP address can not be as DYNAMIC because be inserted into the table IP BINDING otherwise unresponsive (net prohibited).

There are other reasons for which an AP MUST have an IP address?

Thanks

You can configure the AP to be only layer 2 device, without any ip.

The question is incomplete…

The AP must have one (or more) address if is configured as…?

well, if you have one reason that requires an IP address - that is it you have to have an ip address.

However, i suspect if you configure NTP/SNTP client in broadcast mode, you could have time set without IP configuration on the router. As all that is happening, your router is receiving UDP packets broadcasted by NTP server in broadcast mode.

ok, but does not have an IP address can give the advantages?

Now I have problems because the ap does not always receive the IP address from the DHCP server…

Tried, does not work, the router goes on the Internet. What could be the reason?

Thanks

In this case you should rather investigate why there are DHCP problems - if your APs don’t reliably get an address, it might happen to clients as well.

For using your MT as NTP server you need to install the NTP package. Did you?
-Chris