In previous versions of Oracle VM Server for SPARC and the Oracle Solaris OS, you could improve your network performance by configuring jumbo frames. This configuration is no longer required and unless required for another reason, using the standard MTU value of 1500 for your service and guest domains is best.
To achieve the improved networking performance, set the extended-mapin-space property to on for the service domain and the guest domains, which is the default setting for the Oracle VM Server for SPARC 3.1 software and supported system firmware.
primary# ldm set-domain extended-mapin-space=on domain-name
To check the extended-mapin-space property value, run the following command:
primary# ldm ls -l domain-name |grep extended-mapin extended-mapin-space=on