TCP Segmentation Offload (TSO) is turned off by default in HP-UX.
HP recommends that you leave it turned off on both the VM Host system
and on HP-UX guests. This applies to both the virtual network interface
cards in the guest and any physical network interface cards in the
VM Host that are used by vswitches. When TSO is enabled, guest networks
are interrupted.
To verify whether TSO is turned on, enter the following command:
Where n is the VM Host interface,
as displayed by the hpvmnet command. For example,
to verify that TSO is on for lan0, enter the following command:
# lanadmin -x vmtu 0
Driver/Hardware supports TCP Segmentation Offload, Current VMTU = 32160
|
To turn TSO off on lan0, use
the following command:
# lanadmin -X vmtu 0 0
Virtual MTU is set to 0
|
Note that this restriction applies to VIO interfaces.
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