Title: Re: Ethernet link aggregation and Lights Out
management?
At 10:39 PM +1100 1/6/07, Nathan
Zamprogno wrote:
I will shortly be installing a new Intel
XServe, and I would like to do link aggregation (802.3ad) on both the
Ethernet interfaces.
Does anyone know if this has any implications for the Lights Out
management feature of these new XServes? The LOM documentation makes
mention of both eth0 and eth1 being assigned additional static IP
addresses not related to the "main" IP address of the
server, so does LOM just pick up the fact that the interfaces are
bonded and run with it? Keep in mind that the switch that these two
interfaces will be plugged into will also need to be set to 802.3ad
mode, so there will be no ability to address the XServe except through
the bonded interface.
Hope someone can shed some light. Thanks.
I think the answer to your question is going to have more to do with
your switch than the XServe so you should be addressing this question
to the vendor of that switch rather than making us try and guess for
whomever that may be.
No, I think the answer to this question goes beyond the make of
switch I plug it into. The Lights Out configuration screen in Server
Monitor lets you set the IP for LOM for each of the two physical
ethernet interfaces (listed as Port1 and Port2, but presumably == en0
and en1). However, I have created an aggregated interface called bond1
and enabled LACP (Link Aggregation) on the two ports of my switch (A
Procurve 6108) to double-barrel my server bandwidth.
I can see my Intel XServe by using 127.0.0.1 in Server Monitor
locally, but the XServe cannot be seen by SM at all at the
bond0 IP (in the 192.168.x.x range), nor at the "alternate"
IP set in the LOM setup page for Port1 or Port2. Sure, the switch uses
the standard LACP standard procedures to fall back to a single port in
the event of one interface failing, but Apple's implementation may be
fundamentally incompatible with LACP.
I believe LOM is broken for users using link aggregation. At the
very least, there is no word from Apple confirming or denying this
issue, or to supply any guidance.
--
Nathan Zamprogno,
IT Manager, Wycliffe Christian School.
Manager, Baliset Solutions consultancy
email@hidden Ph: (02) 47
536422 Mob: 0412 141 811
http://www.wycliffe.nsw.edu.au
"The suspicious believe everybody to be suspicious; the liar
feels secure in the thought that he is not so foolish as to believe
that there is such a phenomenon as a strictly truthful person; the
envious see envy in every soul; the miser thinks everybody is eager to
get his money;...and the abandoned sensualist looks upon the saint as
a hypocrite"
-James Allen
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