The latest versions of AIX now allow largesend on virtual adapters to remain persistent across reboots. I can’t find any information for this attribute in the AIX 7.1 Information center yet.   The new attrribute is called mtu_bypass and can be changed with the chdev command. e.g   ; AIX 7.1 TL1 SP2. # oslevel -s 7100-01-02-1150   ; LARGESEND is off . # ifconfig en1 en1: flags=1e080863,480<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT, CHECKSUM_OFFLOAD(ACTIVE),CHAIN >         inet 10.153.20.46 netmask 0xffff0000... [More]

Tags:  aix mtu_bypass on virtual adapters largesend ethernet chris_gibson