Knowledge Base

How to set the MTU on Mac OS Link Aggregation bond and optimal MTU value for Mac OS.

The optimal MTU setting for for Small Tree Gigabit cards is
9000 bytes. This ensures best performance, lowest cpu usage and works
best for "flow control".

In OS X you can use the Network Preferences panel (GUI) to set the MTU
but you set it just for the bond and NOT for each interface which is part of
the bond. Mac OS will change the MTU for each interface which is
part of the bond for you.

Other useful commands:

Usage: networksetup -createBond <user defined name> <device name 1> <device name 2> <...>
Create a new bond and give it the user defined name. Add the specified devices, if any, to the bond

Usage: networksetup -deleteBond <bond name ie., bond0>
Delete the bond with the specified device-name.

Usage: networksetup -addDeviceToBond <device name> <bond name>
Add the specified device to the specified bond.

Usage: networksetup -removeDeviceFromBond <device name> <bond name>
Remove the specified device from the specified bond

Usage: networksetup -listBonds
List all of the bonds.

Usage: networksetup -showBondStatus <bond name ie., bond0>
Display the status of the specified bond.

Back to Apple OSX 10.5

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