Hi all,
A tip for all who need to configure link aggregation on Mac OS X Tiger 10.4.2, Xserve G5 and 3Com Gigabit Switches (SuperStak III 4924 – 3C17701).
Install latest firmware from 3Com.
Enable LACP on the two ports connected to the Xserve G5 and don’t waste time to manually add the ports to link aggregation set.
by 
The same happens with the switch 3com SuperStack 4950
After enabling Link Aggregation it’s important to setup the netwerk interfaces
correctly. If you’d like to do this command line you’ll need the following
commands:
networksetup -createBond LA1 en0 en1Aggregate en0 and en1 as bond0 (replace bond0 with your favorite
name)
networksetup -createnetworkservice LA1 bond0Create a new network service named LA1 (or whatever you’d like to call
your new network service) using ‘hardware’ port
bond0
networksetup -setmanual LA1 192.168.1.2 255.255.255.0192.168.1.1
Setup LA1 with IP address 192.168.1.2 netmask 255.255.255.0 and
router
192.168.1.1 (use the same settings as currently set to en0)
networksetup -setdnsservers LA1 1.2.3.4Set the DNS servers
networksetup -setMTU LA1 9000Enable Jumbo Frames (optional, don’t forget to enable jumbo frames
support
on your switch too)
networksetup -setv4off "Built-in Ethernet 1"
networksetup -setv4off "Built-in Ethernet 2"
networksetup -setv6off "Built-in Ethernet 1"
networksetup -setv6off "Built-in Ethernet 2"
Turn of the networking on Built-In Ethernet 1 and 2, as this is now done
by
LA1
Try if it works by pinging your router and disconnect one of the network
cables. Don’t panic if the network stalls for a moment (up to 30 seconds). The
network is reconfiguring itself.
As soon as I tried setting this up on a managed DLINK gig switch( with the
newest firmware) ,I kernel panic’ed.I am wondering if anyone else has set this up
with a dlink.We had some arp poisoning going on a little after that and I am
pretty sure that was the cause but I wondering if anyone has set this up with this
brand.Hard to test in a prod enviorment,hooha for dmg restores!
I tried Link Aggregation with Tiger 10.4 (not Server) and a Netgear ProSafe™
48-port Gigabit Smart Switch (Model GS748T). Could not get it to work. I set
the two ports on the switch to port trunking. The linked the two ethernet
interfaces using the Network control panel, which said that the switch was not
set up for link aggregation.
Contacting Netgear support, they claimed that the switch’s implementation of
link aggregation only worked when connected to another switch, not a
computer.
Has anyone had any luck with such switches and link aggregation under
Tiger?
Thanks,
James.
I tried LACP on an Asante Intracore switch months ago and had success
everyone but one place: Netboot. Netboot didn’t recognize the bond1 interface.
Since the server was our primary Netboot server that killed the plan.
Has anyone had any success with bonding and Netboot? Perhaps with system
software updates?
You need to set netboot up on one interface in SA, then create your bond, then
go into the NIDB and edit the records to point the netboot server at the bond
interface name.
Server Admin, just is ignorant about the bonds. So watch out against using it
again from that point for netboot. I’ve not tried it, but I imagine the CLI tools
would work.
—
Breaking my server to save yours.
Josh Wisenbaker
http://www.afp548.com
I haven’t tried it and even if I had, I couldn’t say anything about it.
Remember your NDA with the ADC everyone!
—
Breaking my server to save yours.
Josh Wisenbaker
http://www.afp548.com
Just an FYI. We have Asante GX5-2400W switches. While they do support
"trunking" it is not the protocol required by OSX for link aggregation. It
merely enables the trunking of two or more GX5 switches.
—
Matthew Kosterman
Chief Executive Geek
DeltaQuest Imaging, Inc.