How did you configure LACP on the switch side.

There are usually more than one method for selecting
which physical network interface to use.

Because our storage node is on a separate Layer-3 network
we had to use the source-IP algorithm for our Cisco switch.
If we had used a MAC address based algorithm, all traffic
would have gone through a single interface.

We find that 700Mbps per interface typical.  Before we used LACP
we managed to get about 900Mbps.  Now with three interfaces with
the aggregate we now get up to ~ 2000 Mbps across the three
interfaces.  It would not surprise me if this is close to the
limit of the server, rather than the network.  Writing at 230 MB/s
to disk may be stretching a friendship on our little box.

We are using a SUN X4500 (thumper).  We are planning another
thumper but the X4540 with a 10Gbps ethernet card to remove
the need for LACP.

Tim.


On 19/08/2008, at 1:53 PM, anandhg wrote:

I have a Sun Fire V890 storage node running Solaris 10 with 4 ce interface. I am planning to configure this storage node mainly for LAN based backups. I have trunked the interface with Sun Trunking 1.3 and also configured lacp in switch side. In my case most of the traffic is passed to one interface instead of distributing.

Also I am not getting more than 700Mbps throughput using four interface even if I increase more network sessions. Not sure if there is any config issue.

I have already raised a case with SUN, but just want to understand if you have some good experience with sun trunking on performance front. How about HP APA.

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Network Services
Information and Communications Technology
The University of Sydney
University Computing Centre H08, University of Sydney NSW 2006
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