Problems with "unknown DHCP server" from ISP

RouterOS General
1

Hi,
my ISP provide me IPTV services, and i have set up box connected in eth5 port. All OK with that, it usually works.
But other dhcp clients from wlan and lan sometimes got IPTV dhcp settings, with these settings no internet, only IPTV.
With dhcp alert function i see these:

And other PC’s on lan sometimes got normal my dhcp settings, and sometimes IPTV dhcp settings.
So, is where a priority to dhcp, or any rule, to block iptv dhcp at all, and dedicate it only for eth5?
Authoratitave not work, set to “yes”.
I’m working on this question several weeks, made many tweaks with no success. I even not remember everything i tried…

So anyone have similar problem?

In short: need to block, or redirect this dhcp server to eth5-slave

2

Normally you will have the IPTV traffic on a different network than the Internet service.
E.G. a different VLAN.
You must make sure that you have no traffic between those two networks.
Details depend on your actual situation.

3

my network, and iptv network (vlan with ID-6) are on same bridge, this is problem?
But how about watching IPTV on local PC’s through VLC? This working fine now.

4

I don’t know how the IPTV works at your provider, but the situation with a separate VLAN and separate DHCP
server is quite common and of course it requires special configuration to make it all working 100%.