Passthrough traffic of one device without NAT?

RouterOS General
1

Hi!

I have came across to another interesting (at least for me) problem:

My network is kind of simple:

ISP Router <-> Miktrotik <-> Everything else on LAN

I have a set-top box for TV, which gets its data from ethernet. Currently this box is also connected to the Tik.

However, TV is not working very well: it starts playing then after a few seconds it stops claiming lost signal. (Ethernet cables are all good).

Now I realized if I connect the set-top box to the ISPs router, it works without any further issues.

What would be your steps to finetune Tik to kindof passthrough the traffic to/from this set-top box to ISP router?

I really would like to keep this cable plugged into Tik, as sometimes I use this for other purposes, and Tik is at an unconvenient place.

Thank you!

2

One small change solved it: simply putting ETHx and ETH_ISP to a common bridge does the trick.

(And obviously finetune all related firewall and NAT rules accordingly)