[ovs-discuss] [OVN]: Routing external traffic through a specific gateway

[Brendan Doyle]

Hi,

I'm a bit of a newbie so may not be the best to advise, but I think what 
you are trying to do
(if I understand correctly) is possible, have you checked out Numan's 
write up here:

https://developers.redhat.com/blog/2018/11/08/how-to-create-an-open-virtual-network-distributed-gateway-router/

This shows you how to do east west with a distributed router, and then 
north south with a
distributed gateway port, which can be bound to a specific chassis or 
scheduled in HA mode
across several chassis. I think this is what you are after.

Rdgs

Brendan


On 23/04/2020 12:11, Alexander Constantinescu wrote:
> Hi all,
>
> I am posting this here as I delved through the ovn-nb documentation 
> for a couple of days without any bright ideas popping up.
>
> I am trying to have north -> south and south -> north traffic for a 
> logical_switch_port traverse a specific router gateway of my choosing. 
> This means: I don't want external traffic in any direction for this 
> logical_switch_port to pass through its pre-defined distributed 
> gateway router.
>
> Some background: the logical_switch_port that I would like this to be 
> done for, is of type:"" (meaning it's connected to "A VM (or VIF) 
> interface") and is connected to a distributed gateway router local to 
> the node the logical_switch_port is hosted on. I have changed the type 
> to "router" and defined "options: router-port=...", and this is where 
> I lose insight as to:
>
> - How to configure the router-port correctly so that external traffic 
> for the logical_switch_port gets passed to it and properly routed 
> afterwards
> - If this is even the right approach?
> - Is this possible to do only for north -> south / south -> north 
> traffic. And thus keep east -> west and vice versa intact?
>
> Any ideas are welcomed.
>
> Thanks in advance!
> /Alexander
>
>
>
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