Thanks to all the people who responded. Quick Overview: Private switched but non-routed network with Cisco Catalyst switch and all GigE blades in switch. Various Sun servers with GigE cards connected to private network. GigE to GigE, so fragmentation is not a issue. Testing done through switch as well as direct server to server. Symptom: I can't turn the MTU size up on the GigE interface to increase throughput. Answer: Official answer finally recieved from Sun is the Sun GigE cards no longer support Jumbo packets. And can not be set to a MTU higher than 1500 (same as 10BaseT/100BaseT). Result: Sun GigE cards max out at about 440Mbits transfer rate even running multiple treaded iperf and ttcp tests. My response: Thanks to the people who suggested using SysKonnect and Intraserver cards as a alternative to the Sun cards. They seem to be higher performance and cheaper too. Note: The Tolly report thats listed on Sun's web page must be using the previous version. _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Thu May 16 16:52:23 2002
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