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View Full Version : A network question. . . (or two)




ghboard2010
Nov 19, 2012, 10:26 PM
Whatever in the world happened to 'Jumbo Frames' and what good or bad were they?



Les Kern
Nov 20, 2012, 06:16 AM
Whatever in the world happened to 'Jumbo Frames' and what good or bad were they?

You know, in a perfect world that technology would be great, but in the real world with our blistering low-bandwidth, half-assed internet infrastructure not so much. And imagine the config issues both internally and externally. Nah. (I am assuming you're talking about network technology right? And not The Jumbo Frames , the pro wrestling twins from the 60's?)

assembled
Nov 21, 2012, 12:46 PM
Jumbo Frames are only usable in a LAN environment where all nodes (including switches) support them.

As the frame is larger than normal, although you have the same amount of overhead per frame, because there is more payload per frame, your total overhead goes down compared to the same amount of data transferred with 1500 byte frames.

Ap0ks
Nov 21, 2012, 02:46 PM
Whatever in the world happened to 'Jumbo Frames' and what good or bad were they?They're used extensively in storage networks and quite possibly a lot of backhaul connections utilise them. As assembled pointed out both ends of the connection have to support the increased frame size which makes them less appealing to general LAN networks and home internet connections.

ghboard2010
Nov 22, 2012, 02:16 AM
They're used extensively in storage networks and quite possibly a lot of backhaul connections utilise them. As assembled pointed out both ends of the connection have to support the increased frame size which makes them less appealing to general LAN networks and home internet connections.

Too bad; I've got a 2006 Mac Mini Core Duo which support(ed) Jumbos, or at least my memory leads to think this is the case.

I did however notice the wife's iMac{April 2008} shows this:
Marvell Yukon Gigabit Adapter 88E8055 Singleport Copper SA:
in the the system profile.

I think that old Mac Mini of mine had the same chip IIRC. I seem to recall Mac OSX dropped the Jumbos in 10.5 Leopard{again IIRC}. Also my iMac(Late 2009) uses a Broadcom chip which I understand also does not support Jumbos. So it looks like both hardware and software have evolved on the client-side to not use Jumbos. Oh well. . .