[CALUG] Gigabit Ethernet

Jason Dixon jason at dixongroup.net
Tue Oct 18 06:00:14 CDT 2005

On Oct 17, 2005, at 9:35 PM, Ray Lischner wrote:

> Among the three main systems that I use daily, I often have to work  
> with
> files that reside on one of the other machines. Remote files access is
> noticeably slower than local file access. My proposed solution is to
> switch to Gigabit Ethernet.
> I started to do a little research, and stumbled on the issue of Jumbo
> Frames. My understanding is that if I am bothering to run Gigabit
> Ethernet to improve performance, I should probably also enable Jumbo
> Frames. On the other hand, Jumbo Frames would work only within the  
> LAN.
> For any network access outside the Gigabit LAN, I cannot use Jumbo
> Frames, which means I need two Ethernet adapters in each machine.
> (That's not a problem; I can continue to use the current adapter for
> Internet access and use the new Gigabit adapters for LAN access.)

Wouldn't PMTU discovery allow the sending host to retransmit at 1500  
for anything not destined for the local LAN?

Jason Dixon
DixonGroup Consulting

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