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Any of the non PCIE PowerMacs support jumbo frames?
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Dedicated MacNNer
Join Date: Sep 2004
Location: Seattle
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I've started almost completed my quest to go completely gigabit, does anyone know if my PM 2.0 DP ethernet card supports jumbo frames? Its the rev with 4 ram slot, without PCI-X slots. I just picked up a nice 16 port gigabit switch.
Googling shows that the new PowerMac does.
I've seen a few places that say the PM does not support it, but I want to make sure all Rev's don't. Also, any recommendations on gigabit cards that will work in the PowerMac that support jumbo frames?
(Last edited by mhuie; Nov 10, 2005 at 09:20 PM.
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MBP 1.83
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Clinically Insane
Join Date: Oct 2000
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Because of the way tooki, one of our admins, described the capability, I assume only the dual cores support jumbo frames.
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"The natural progress of things is for liberty to yield and government to gain ground." TJ
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Posting Junkie
Join Date: Oct 2005
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No, the built-in ethernet controller on the PCI-X PowerMacs and Xserves do not support jumbo frames.
Jumbo frames are a new thing for Apple; they just added support for them in OSX 10.4.2.
If you have a PCI-X PowerMac you can get support fro jumbo frames with addin cards like these from Small Tree.
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Clinically Insane
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Are jumbo frames going to be important for full IPv6 support?
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"The natural progress of things is for liberty to yield and government to gain ground." TJ
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Dedicated MacNNer
Join Date: Sep 2004
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Originally Posted by mduell
No, the built-in ethernet controller on the PCI-X PowerMacs and Xserves do not support jumbo frames.
Jumbo frames are a new thing for Apple; they just added support for them in OSX 10.4.2.
If you have a PCI-X PowerMac you can get support fro jumbo frames with addin cards like these from Small Tree.
Their cheapest card is a 2 port gigE, @ $279 and it looks like a PCI-X card. Any single port, PCI and reasonably priced card?
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MBP 1.83
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Dedicated MacNNer
Join Date: Apr 2003
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No. Jumbo frames, theoretically at least, reduce the processor overhead when using gigabit ethernet by increasing the data portion of each packet, resulting in fewer packet headers that require inspecting (and routing).
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Admin Emeritus  Join Date: Oct 1999
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The Xserve G5 also has ports with Jumbo Frame support. I think only one of the ports on the G4 Xserves have it.
But regardless, you realize that to use Jumbo Frames, every single device on the network must support them? That's a costly proposition that's likely not going to give you a big end benefit.
tooki
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