Kenneth,

So, I'll have to look into duplexing also. I'm beginning to think
that the studying of this kind of server improvement techniques is
going to keep me busy for a while. :-)

Thank you,
Wouter


On 20-Oct-02 Kenneth Godee wrote:
> 
>> The beauty of link aggregation is that  the more NICs that you
>> have in the group (pool), the better
>> your throughput.  For instance, if you had 2 100Mb network
>> adapters in the pool then your throughput
>>from the server to the switch in theory  is 200Mb/s, if you had 4
>>NICs in the pool the throughput
>> would  be 400Mb/s and so on.  If one of the adapters were to fail,
>> the other adapters will take up
>> the slack and network service would not be interrupted.  
> 
> 
> Don't forget Duplexing, in theory 2 100mb nics duplexed will
> provide 400mbs!
> 
> 
>> The problem with this strategy is that most of the link
>> aggregation technologies are NIC vendor
>> dependant where NIC drivers and switches would communicate using
>> proprietary protocol. The IEEE
>> 802.3ad Port Aggregation  standard will address this issue.  Also,
>> the link aggregation NIC driver
>> software is usually  written  primarily for  NetWare or Windows 
>> network operating system.  So you
>> may have to do some research to find a Linux-based solution.
>  
> Not only NIC driver dependant, OS dependant but "switches" are
> quite picky as well.
> Unless your using same switch and NIC manufactured devices good
> luck asking any questions
> to the manufacture.
> It's usally not much of a monetary investment, usally a time
> investment, there's 
> lots of stuff out there and features built into the switches
> already, just getting it all to
> work and talk to each other takes time, I don't believe you'll have
> much success
> unless your using higher end managed switches.
> But it's alot of fun to set up and does increase performance.
> And as always there's more than one way to skin a cat.....
> The compaq/ltsp server where setting up now had dual embedded nics,
> instead of bonding, load balancing
> etc. we assigned different ip's to same subnet,
> one nic for ltsp workstations and the other nic assigned for admin,
> database, etc. traffic.
> This allows you to "split" up the traffic and in the future if we
> want to set up the ltsp
> workstations in a "virtual" net, we're good to go. Assigning dual
> nic's in same subnet is a 
> bugger, but it can be done.
> 
> 
>> 
>> ----- Original Message ----- 
>> From: <[EMAIL PROTECTED]>
>> To: "LTSP discussion list" <[EMAIL PROTECTED]>
>> Sent: Saturday, October 19, 2002 5:27 PM
>> Subject: [Ltsp-discuss] Link aggregation [Was: Colision when using
>> ltsp]
>> 
>> 
>> > Conrad,
>> > 
>> > I understand why replacing hubs with switches is an improvement.
>> > However, I never heard of link aggregation.  What does it do and
>> > how
>> > does it improve the network performance?  Why is it one has to
>> > _invest_ in it?
>> > 
>> > 
>> > On 19-Oct-02 Conrad Lawes wrote:
>> > > 
>> > > I would argue that you should use a switch (not a hub) when
>> > > using
>> > > ltsp.  A switch will definitely minimize network collision. 
>> > > Whenever you are running multiple diskless clients it's
>> > > important
>> > > that you reduce as much network bottleneck as possible to
>> > > maximize
>> > > performance.   Using 100/Mb switches instead of hubs is one
>> > > way of
>> > > reducing network bottlenecks.   An additional option is to
>> > > invest
>> > > in link aggregation (nic pooling) solution on the ltsp server.
>> > > 
>> > >  Remi BERNHARD <[EMAIL PROTECTED]> wrote:
>> > >> > On 17 Oct 2002 17:21:13 +0000, Joyce LAMBERT wrote
>> > >> > > When ltsp is used, i can notice lots colision when using
>> > >> > > ltsp.
>> > >> > > More tere
>> > >> > > are worstation working and more colision i have.
>> > >> > >
>> > >> > > So with 4 worstation, the network become realy slowly and
>> > >> > > can't be used.
>> > 
>> > --------------------------------------------
>> > Wouter DeBacker ([EMAIL PROTECTED])
>> > 19-Oct-02    23:27:39    (SuSE Linux Xfmail)
>> > --------------------------------------------
>> > 
>> > 
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>> > 
>> 
> 
> 
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--------------------------------------------
Wouter DeBacker ([EMAIL PROTECTED])
21-Oct-02    21:12:35    (SuSE Linux Xfmail)
--------------------------------------------


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