Ok, looking over and see many articles on this from old version how-to to some more current. Here is how to do it for those that don't want to read a book and test it.
First, no need to destroy any LAGG's or anything of the sort like I read.
1. Open up your GUI console and under "Network" -> "Link Aggregations" -> "LACP" (or whatever you created) -> "lagg0" (or whatever you named it) -> "em0" & "em1" (both nic cards) open them up one at a time.
2. In EACH of the NIC (em0 & em1) 4th option, it will say "Options". In there you want to type "mtu 9000 up"
REBOOT AND YOUR DONE.
Test-----
First, make sure that you have the SSH (with Login as Root with password option set) turned on.
Use a program like PuTTy and log into your shell and from the prompt type "ifconfig"
Expand the window to see all your nic and lagg information and both nic's and lagg will say mtu 9000. (Don't forget to reboot after you set the Options in the GUI or it will not work).
There you go. So, without that option, default is MTU 1500... remove that option and reboot to set it back to MTU 1500. Only the NIC have to have the options set as the LAGG inherits this setting.
Hope this helps.
First, no need to destroy any LAGG's or anything of the sort like I read.
1. Open up your GUI console and under "Network" -> "Link Aggregations" -> "LACP" (or whatever you created) -> "lagg0" (or whatever you named it) -> "em0" & "em1" (both nic cards) open them up one at a time.
2. In EACH of the NIC (em0 & em1) 4th option, it will say "Options". In there you want to type "mtu 9000 up"
REBOOT AND YOUR DONE.
Test-----
First, make sure that you have the SSH (with Login as Root with password option set) turned on.
Use a program like PuTTy and log into your shell and from the prompt type "ifconfig"
Expand the window to see all your nic and lagg information and both nic's and lagg will say mtu 9000. (Don't forget to reboot after you set the Options in the GUI or it will not work).
There you go. So, without that option, default is MTU 1500... remove that option and reboot to set it back to MTU 1500. Only the NIC have to have the options set as the LAGG inherits this setting.
Hope this helps.