I put together a wiki page on Ethernet Bonding (
http://wiki.logicalnetworking.net/doku.php?id=networkbondingubuntu804 )
a while back, it should still be relevant.

There are bonding modes (such as mode 0) which don't necessarily require
any special functionality on the switch side. I can't tell you myself
whether bonding NICs and then putting each one on its own switch, which
is daisy-chained to each other switch, would result in some crazy
networking explosion, but my intuition tells me there's got to be a
better way to do it. I would seriously consider replacing your switches
with ones with at least a couple of gigabit ports available each so you
can take advantage of that. Imagine even 10 clients going through that
last-chained switch for full GUI sessions to the server, 3 100Mbit/sec
hops to the server and back..yikes. 45 clients to a single server with 3
100Mbit/sec bonded NICs on the SAME switch would even be pushing it IMHO
(you'd want to have at least 1Gbit/sec out of the server)..

Consider replacing your switches and server NIC(s). It'll hurt the
pocketbook but the pain will evaporate at the sight of 45 snappy
terminals :)


Cheers,
Jordan



On 05/18/2010 12:43 PM, jan nilsen wrote:
> So, I have a server with a 1gbit NIC, and 3 16-ports switches (all
> 100mbit ports), that are linked togheter the old switch-in-switch
> style, and I have about 45 clients (mix of thinclients, workstations
> and laptops).
> 
> When most of the machines are in use, I notice that having only
> 100mbit out of the server is not enough.
> 
> So I can either buy myself a 48 port switch with 1gbit uplink with
> money we don't have, or I thought I could try this "bonding" thing.
> 
> I can put 3 network cards in the server, and connect each of those
> networkcards with it's own 16-port switch, that way I would have
> 300mbit out of the server.
> 
> What kind of bonding mode should I choose?
> 
> Or is there some other way?
> 
> jan
> 
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-- 
Jordan Erickson
(707) 636-5678 - http://www.logicalnetworking.net
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