Strange behaviour of the DHCP server (is he working at all?)

Software SW bugs discussion
1

Dear friends

I need your help, my Turris Omnia Router shows a very strange behaviour in the last weeks. The routers IP is 192.168.1.1. and the DHCP range is set at 100 with 150 max leases.

When I connect with my phone by WLAN, it connects but it says no internet access. When I check the IP address of the phone it is 192.168.10.100, which is definitely not within the range. Only if I set the phone to a fixed address within the range it works. But even if I set a static address with the MAC address of the phone in the router, the phone does not connect correctly, if I change the access point (we have around 5 AP). What can I do to check/repair/restart the DHCP server (the router I have restarted many times.
The Ethernet clients behave the same strange way, but there it is easier, to set fixed IP 's but we have 4 phones and 3 tablets = 35 manual setting…
Thanks for your help!

PS: I am anything else than an expert!

Greetings form sunny Prague

2

That sounds like you have different dhcp server running somewhere inside your network. OpenWRT in general first checks whether there is another DHCP server running on LAN before starting it.

3

Hi Miska

That was my first theorie too. But the only sources of DHCP servers are 2 NAS in the network. It is true, that some days ago, one of these was by error configured as a DHCP server, but this is switched of since long and I have restarted the router manytimes since this.

4

Hi,

If you turn off DHCP on Turris and plug in some client will it get any IP (other than zeroconfig)?

5

Hi Mike
No, he doesn’t get an IP

6

I checked with DHCPEXPLORER 1.4.8, there is no DHCP server in the network at all…

How can I recover this service, restart ot the router obviously doesn’t help?