I'm trying to bridge a network over two TP Link Archer C7 Routers with LEDE 17.01.4.
The Gretap intergration for bridging Ethernet over IP which works as designed. In a later step I'd like to use IPSec for the encryption.
Now, whenever I'm trying to start web browsing or doing some other things else, I'm having trouble with the MTU-Size. The setup looks like this:
Company Network <-> TP Link 1 <-->GRETAP TUNNEL<--> TP Link 2 <-> PC
When I set the MTU of the PC to 1200, everything works fine but I have to reduce the the MTU Size in one of the TP Link Routers, as there are many different devices in this location.
I tried to change the MSS with iptables but I couldn't get it working.
I'm trying for days now and I'm desperate, please help
Thank in advance!