[Openstack-operators] Neutron Multiple gateways instances source routing

Salvatore Orlando salv.orlando at gmail.com
Sun Nov 29 07:29:33 UTC 2015

Hello Pedro,

Neutron has some (limited) capabilities for injecting static routes into
You can try whether the subnet's host_routes attribute [1] can satisfy your
Routes can however be specified only in the form destination CIDR/next hop.
Note: the host_routes option leverages DHCP option 121 in the reference
implementation and therefore requires DHCP on network interfaces.


(sorry for the link to the code, the API spec does not render anymore
correctly the subnet page)

On 18 November 2015 at 12:23, Pedro Sousa <pgsousa at gmail.com> wrote:

> Hi all,
> I've a couple of linux instances with multiple interfaces (different
> networks and gateways) and I would like to setup source routing, meaning
> for example that packet that enters interface eth0 should be routed to it's
> correspondent gateway interface and not default gateway.
> My question is if this can be done with neutron or do I need to configure
> it inside the instances?
> Thanks,
> Pedro Sousa
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> OpenStack-operators mailing list
> OpenStack-operators at lists.openstack.org
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