I've got an RB450G acting as an L2TP client connecting to an RB493G. Both are at 5.5.
Both ends are tied into an EoIP bridge. Because of that, I've set the MRRU on both ends set to 1600. That isn't working, for some reason. Large packets are being dropped.
Here's the only thing I have found so far that looks weird:
On the client side:
interface l2tp-client print detail
Flags: X - disabled, R - running
0 R name="l2tp-out1" max-mtu=1460 max-mru=1460 mrru=1600
connect-to=x.x.x.x user="private" password="never you mind"
profile=bridge add-default-route=no dial-on-demand=no
allow=pap,chap,mschap1,mschap2
On the server side:
interface l2tp-server server print
enabled: yes
max-mtu: 1460
max-mru: 1460
mrru: 1600
authentication: chap,mschap2
default-profile: default-encryption
interface l2tp-server print detail
Flags: X - disabled, D - dynamic, R - running
0 DR name="<l2tp-private>" user="private" mtu=1600 mru=1600
client-address="x.x.x.x" uptime=9m23s encoding="MPPE128 stateless"
So why is the mtu and mru on the server interface 1600?