- Add l2tp_mtu configuration option, used to define MRU, MSS.

- Adjust TCP MSS options in SYN and SYN,ACK packets to avoid
  fragmentation of tcp packets.

etc/startup-config.default

@@ -10,14 +10,14 @@ set pid_file "/var/run/l2tpns.pid"
 # Shared secret with LAC
 set l2tp_secret "secret"
 
+# MTU of interface for L2TP traffic
+#set l2tp_mtu 1500
+
 # PPP counter and timer values
 #set ppp_restart_time 3
 #set ppp_max_configure 10
 #set ppp_max_failure 5
 
-# Link MRU
-#set ppp_mru 1452
-
 # Only 2 DNS server entries are allowed
 set primary_dns 10.0.0.1
 set secondary_dns 10.0.0.2