= Installing Open V switch on cons-wm-01 =

Identifying information:

{{{
hostname -f
wm-asngw-01.orbit-lab.org

more /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=9.04
DISTRIB_CODENAME=jaunty
DISTRIB_DESCRIPTION="Ubuntu 9.04

uname -a
Linux wm-asngw-01 2.6.28-18-server #60-Ubuntu SMP Fri Mar 12 05:41:54 UTC 2010 i686 GNU/Linux

ifconfig
eth0      Link encap:Ethernet  HWaddr 00:1f:29:0e:3a:68
          inet addr:10.41.0.3  Bcast:10.41.255.255  Mask:255.255.0.0
          inet6 addr: fe80::21f:29ff:fe0e:3a68/64 Scope:Link
          UP BROADCAST RUNNING ALLMULTI MULTICAST  MTU:1500  Metric:1
          RX packets:636384 errors:0 dropped:0 overruns:0 frame:0
          TX packets:828244 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:176839258 (176.8 MB)  TX bytes:91011015 (91.0 MB)
          Interrupt:17
...
}}}

----

=== 9/20/2010 ===

Currently In opt there is an existing open openvsiwtch tarball, but it seems to be for a slightly older version. I've copied the newest stable version from the openvswitch website. 
{{{
sudo wget http://openvswitch.org/releases/openvswitch-1.1.0pre2.tar.gz
}}}

I'm bascially following [http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=blob_plain;f=INSTALL.Linux;hb=HEAD Linux] and [http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=blob_plain;f=INSTALL.OpenFlow;hb=HEAD OpenFlow] guides.

The build process went as follows:

 1. I checked for some prerequisite apt-packages:
     * pkg-configure
     * libssl-dev
     * kernel-headers 
     * build-essential
 1. Run configure with kernel flag
    {{{
    ./configure --with-l26=/lib/modules/`uname -r`/build
    }}}
    It ran from /opt/openvswitch-1.1.0pre2. Built kernel modules since the are Needed for the Openflow Implementation. 
 1. make 
 1. make install
 1. Insert the modules
    {{{
    insmod datapath/linux-2.6/openvswitch_mod.ko
    }}}
    Dmesg should note the addtion of the module:
    {{{
    [5343452.547746] Open vSwitch 1.1.0pre2, built Sep 20 2010 17:04:53
    }}}
----
== NOT SURE IF THIS IS NEEDED ==

  The final step of the build involves initializing a config database: 
    {{{
    http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=blob_plain;f=INSTALL.Linux;hb=HEAD
    }}}

Once Built we need to start the database server and the switch damemon before we can do any thing with it:
 1. Start the server with this command:
    {{{
    ovsdb-server /usr/local/etc/ovs-vswitchd.conf.db --remote=punix:/usr/local/var/run/openvswitch/db.sock --remote=db:Open_vSwitch,managers --private-key=db:SSL,private_key --certificate=db:SSL,certificate --bootstrap-ca-cert=db:SSL,ca_cert &
    }}}
 1. initialize the database using ovs-vsctl (only needs to be done once)
    {{{
    ovs-vsctl --no-wait init
    }}}
 1. Once the database server is started, we next can start the switch server:
    {{{
    ovs-vswitchd unix:/usr/local/var/run/openvswitch/db.sock &
    }}}
----

We can create Virtual interfaces with the IP command [http://linux.die.net/man/8/ip IP manual] Something of the form
{{{
>ip link add type veth
}}}

Once this is created, we can add the virtual interface to the open flow switch with ovs-dpctl.
{{{
>ovs-dpctl add-dp dp0
>ovs-dpctl add-if dp0 veth0
>ovs-dpctl show
system@dp0:
        flows: cur:0, soft-max:1024, hard-max:1048576
        ports: cur:2, max:1024
        groups: max:16
        lookups: frags:0, hit:0, missed:12, lost:0
        queues: max-miss:100, max-action:100
        port 0: dp0 (internal)
        port 1: veth0

}}}