On Mon, Jul 13, 2015 at 08:22:38PM -0700, Alex Wang wrote:
> In a gateway like the VTEP L2 gateway, physical vlans belonging to
> the same logical network form a "logical switch". Each logical switch
> has a dedicated tunnel key and will keep records of all MACs learned
> from the owned vlans. So user can just send packet to a "logical
> switch" and the gateway will figure out the output port and vlan tag
> automatically.
>
> Therefore, it is not really necessary to keep record of the vlan map
> for each gateway physical port in the OVN_Southbound database using
> "gateway_ports".
>
> Thusly, this commit removes the "Gateway" table from the OVN_Southbound
> database. In the "Chassis" table, the "gateway_ports" column is replaced
> by "logical_switches" column which maps the logical switch name in the
> gateway to a logical port name that exists in the OVN_Northbound database's
> "Logical_Port" table.
>
> Signed-off-by: Alex Wang <[email protected]>
>
> ---
> ->V3:
> - Realize that the Gateway table is not needed.
I think that the documentation can be improved.
I ended up with this:
<group title="Gateway Configuration">
<p>
A <dfn>gateway</dfn> is a chassis that forwards traffic between the
OVN-managed part of a logical network and a physical VLAN, extending a
tunnel-based logical network into a physical network. Gateways are
typically dedicated nodes that do not host VMs.
</p>
<column name="logical_switches">
Maps from the name of a logical switch on the gateway to a logical port
name. The logical port name must be unique; one way to do this is by
concatenating the chassis name and the logical switch name. User needs
to create a same named logical port in the OVN_Northbound database's
Logical_Port table.
</column>
</group>
but I still have some issues with it. First, I deleted this sentence
because I didn't understand it, but if you can explain then maybe
rephrasing it would be a better option:
Physical VLANs belonging to the one logical network form a
<dfn>logical switch</dfn> in the <dfn>gateway</dfn>.
Second, the documentation says that the "user" needs to create the
logical port. I'm not sure who the user is in this case.
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