Link Aggegration with an Apple Mac Pro and a NetGear GS108T

Posted by Quinny Wed, 10 Jun 2009 10:35:13 GMT
Yesterday I finally got my Mac Pro. I've been saving up money for one for quite some time now...

Anyway, a few weeks ago I bought a NetGear GS108T managed Gigabit Switch.

It supports 803.3ad (link aggregation). My new Mac does too!

I had to try it out.

Read on for my experiences.
First I had to setup the switch:

Switch interface 1

Switch interface 2


To setup my Mac I had to add a new virtual interface by clicking on the little gear in the Network pane of System Preferences and then choosing "Manage Virtual Interfaces..."
Then just click on the "+" and choose "New Link Aggregate", select your two network interfaces and type the name for your aggegrate.

Link Aggregation

At this point I lost my network connection, after a reboot and some experimenting I discovered that the individual interfaces of the aggregate need to be set to "off" for this to work. Otherwise, you'll end up with more than one IP-address and for some reason, this makes things go very wrong.

Link Aggregation 2

At first, I did this just for fun, to see if it would work. But it is actually very much faster than using just one interface:

Speedy!

This was while transferring two VMWare images from my Mac Pro to a Mac Mini and an Imac at the same time.

I think I'll keep it this way, I don't need the port on my switch and I like not having to wait on file transfers...

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  1. One
    about 1 year later:
    I have a Netgear router wgr614v10 that connects to my Mac Pro. I have not been successful aggregating the ethernet ports.
  2. Quintin
    about 1 year later:
    You router doesn't support Link Aggregation... I haven't found any routers that do (not cheap consumer ones, anyway...). Besides that, it only does 100Mbit per port, you'll get quite a network speed boost if you were to upgrade to a 1000Mbit router. If all your other devices are wireless, though, it won't really be noticeable for you...

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