Good day to you all! This is of low importance but am very curious to know if anybody can tell me if this is a config issue or a RouterOS bug.

Friend and I have been in the networking WISP world for a long time so we know our way around RouterOS, and from time to time we like to play old games that requires a LAN connection to play. In this instance it's Splinter Cell Chaos Theory. We created an EoIP tunnel between our routers, and added them as members into our respective bridges. We also enabled DHCP snooping to stop DHCP from causing issues across our link. We each added secondary IP's to our PC's and launched the game, and sure enough we are able to play. However, at both of our houses the blizzard launcher and any blizzard games are unable to connect to the internet. We disable EoIP tunnels and no difference, we remove the disabled EoIP tunnel from the bridge interfaces and everything starts working. there seems to be some bug or setting that seems to cause issues in this setup and I have no idea what that might be. You will surely find the workaround funny, we each created a second bridge, added an unused Mikrotik port into the bridge along with the EoIP tunnel and then connected those unused ports into another port on our routers that were already a member of the main bridge. LOL worked like a charm as stupid as it is. In any case I wanted to post here and see if anyone has any idea what may be causing this issue. I found this link https://www.reddit.com/r/mikrotik/comme ... p_tunnels/ where the person clearly is having a similar issue but never posted a fix.

Some things we have tried:

Disabling Clamp TCP MSS on the EoIP tunnel at both ends
Disabling fastpath (broke the tunnel as one might expect)

Not sure what else to try, and we have a fix in the meantime anyhow.

We have no form of encryption for this, we just use it to play our games and then disable the tunnel when we are done, it's only traversing the ISP network anyhow, not going over the internet.

Any thoughts would be greatly appreciated! Thanks!

When you add the EoIP tunnel inside the Bridge then the Actual MTU of the Bridge changes and gets equal to the EOiPs MTU that is less than 1500 Byte...
You just have to type manually inside the MTU field of the Bridge interface, it is above the actual MTU, the value 1500...

Ah I should have thought of this! Seems so obvious now. I'll play with that when I get a chance, I'm sure that will fix it. Thank you!

I checked this. It's works.

BTW: how to mark post with "Solved" label ?