Setting up link aggregation in Solaris is pretty simple. First make sure you have a recent version (I'm using update 5 aka 5/08 and update 6 aka 10/08).
Then make sure your switch is configured. For example, on one of my Summit switches where I'm going to aggregate ports 7 and 8:
enable sharing 7 grouping 7 8 lacp
You can see the state of the network interfaces on the host using
, for example:
# dladm show-dev
nxge0 link: up speed: 1000 Mbps duplex: full
nxge1 link: up speed: 1000 Mbps duplex: full
nxge2 link: unknown speed: 0 Mbps duplex: unknown
nxge3 link: unknown speed: 0 Mbps duplex: unknown
Then on the host (connected to the console - trying to do this over the network is obviously going to be difficult), take down the existing interface:
ifconfig nxge0 down unplumb
Create an aggregate out of nxge0 and nxge1, with index 1 (why normal interfaces start out with index 0 and aggregations start out at 1 is one of those oddities):
dladm create-aggr -P L2 -l passive -d nxge0 -d nxge1 1
And then bring the interface up:
ifconfig aggr1 plumb
ifconfig aggr1 inet 172.18.1.1 netmask 255.255.255.0 broadcast 172.18.1.255 up
and then rename /etc/hostname.nxge0 to /etc/hostname.aggr1 so the right thing happens next boot.
Here I've enabled LACP (the '
' flag). I'm not absolutely sure how vital this is, but I think the switch and the host need to be set compatibly.
I had a little play with the policy. In the command above it's set to 'L2'. This didn't work well for me - all the traffic went down one of the links. Same with 'L3'. Setting to to use both L2 and L3 seemed to work better
dladm modify-aggr -P L2,L3 1
and I got traffic using both links, and an aggregate throughput obviously in excess of a single gigabit.
Monitoring the aggregate can again be done using dladm. For example, you can watch the traffic and how much goes down each link with 'dladm show-aggr -s -i 1'.