If you are using Ethernet to implement the private interconnect and your cluster is configured with scalable services, then you must configure jumbo frames for both the public and the private networks. The private interconnect must be configured with the same or greater maximum transfer unit (MTU) as the public network.
If you are using SCI or Sun Fire Link to implement the private interconnect, you can use jumbo frames on the public network with no restrictions. For information about how to configure jumbo frames, see the Sun GigaSwift documentation.
All of your cluster interconnect paths must be configured with jumbo frames on when using jumbo frames.
Certain patches are required to use jumbo frames with Sun Cluster. Use the PatchPro tool (http://www.sun.com/PatchPro/) to get these patches.