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A LACP bond comprising of 10Gbase-F interfaces do not come up when the MTU is set above 1500 bytes.
2012 Models Security Appliances
R75.40VS, R76, R77
Any appliance with 10GB NICs using the ixgbe driver with R75.40VS and above a LACP (Link Aggregation Control Protocol) bond including the 10Gbase-F interfaces do not come up when the MTU value for the bond is set to more than 1500 bytes.
This issue is the result of outdated ixgbe drivers included for 10Gbase-F interfaces.