Maybe someone has faced this issue before.
I have 2X RB-1100X2AH ver 5.14 and another two X86 running 5.14 as well.
Each pair connected with IPSEC and Eoip which creates two different L2 links over LACP.
The two pairs connected using a single GigE connection.
This gives me a load balancing and redundancy.
A week ago I noticed that the X86 is transferring a lot more data over the IPSEC compared to the RB.
I found that doing a bandwidth test over the ipsec connection from the devices results as follow.
X86 600-800 Mbits (Very GOOD).
RB 1100X2AH 30-80 (Very POOR).
All test using single TCP connection.
In the past the RB has giving me 800+ Mbit.
I have sniffed the traffic and notice that the RB packets looks fragmented 1510 + 150 while on the X86 it looks well 1514.
What should be the correct MTU settings? I have played with the mtu l2mtu i did not notice the change.