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#298681 - 25/05/2007 16:28 Jumbo frames… yet again
BartDG
carpal tunnel

Registered: 20/05/2001
Posts: 2616
Loc: Bruges, Belgium
Hi all,

I’ve got a question that some of you most likely know the answer to. I’m still looking at buying a NAS device. As most of you probably know, you can increase the transfer rate of such a NAS if you use jumbo frames (= increasing the MTU, up to 9000).

Now, I thought for this to work I would need :
1) a NAS device (obviously)
2) a router/switch which support jumbo frames
3) enabling jumbo frames on the PC ethernet port.

In other words, I though that every device on the chain needed to support Jumbo frames for this to work.

For this reason, I was going to replace my trusty D-Link 4300 gigabit router with a D-Link DIR 655. The only reason I was going to do this is because this router does support jumbo frames and the 4300 does not.

Now I’ve read on another forum that this is of no importance, because the switch only sends information from one unit to another. Because of this, I would have no benefit in also upgrading my router.

Is this true? I have a hard time believing this.

Thanks!
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#298682 - 25/05/2007 17:55 Re: Jumbo frames… yet again [Re: BartDG]
tman
carpal tunnel

Registered: 24/12/2001
Posts: 5528
Nope. You need it to support jumbo frames. The switch will be inspecting each frame to see which port it should go out on.

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#298683 - 25/05/2007 19:00 Re: Jumbo frames… yet again [Re: tman]
BartDG
carpal tunnel

Registered: 20/05/2001
Posts: 2616
Loc: Bruges, Belgium
That's what I figured as well. Thanks for the confirmation!
_________________________
Riocar 80gig S/N : 010101580 red
Riocar 80gig (010102106) - backup

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#298684 - 25/05/2007 20:40 Re: Jumbo frames… yet again [Re: BartDG]
andym
carpal tunnel

Registered: 17/01/2002
Posts: 3996
Loc: Manchester UK
I just bought a gigabit fiber converter which turns out not to support jumbo frames, i had assumed it was just a media converter so couldn't give a toss about the contents of the packets, but no.... So that was a disappointment.
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Cheers,

Andy M

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