Re: [Jack-Devel] Linux to Linux jacknet ?

Hi Tom,

On Tue, Mar 19, 2013 at 04:15:36PM +0000, Tommaso Cucinotta wrote:
> On 03/03/13 15:40, Stéphane Letz wrote:
> > 3)  So on master side :
> > 
> > jackd -d alsa ….
> > 
> > jack_load netmanager
> 
> Hi Stephane,
> 
> I have one more question: in my network set-up, the master has multiple (either real or virtual) interfaces, and the IP it binds to (as from the qjackctl log window) doesn't seem really the right one I want. Is there a way I can specify/force, when I load netmanager, which network interface it should be listening to, for slaves to connect ?
> 
If you want to use unicast then providing IP to netmanager unambiguously binds to that IP, whichever interface it is assigned to.
There's a trcik here though - if you're using secondary IPs - UDP packet might (or actually will) still leave the system from system default IP. 
Simply because outgoing socket is recreated once probe is received, and when it is recreated it's not bound anymore, just an ephemeral port.
You can force system IP (default outgoing IP to use by the system) by creating a route with source IP
# ip ro add <destination> <gateway> src <secondary ip>
i.e.
ip ro add 2.2.2.2 via 1.1.1.1 dev eth1 src 1.1.1.10 
now whenever connection will be initiated towards that host system will chose that source address unless asked otherwise explicitly.

If you need multicast - there's another story.
Since you're using ubuntu you can try out my proposed patched package having this feature.
See neighbouring thread for details.
PPA is at https://launchpad.net/~rufferson/+archive/snd
In that version you can specifiy all, explicit or default interface to listen for multicast on.

Regards,
Ruslan

1363730366.20677_0.ltw:2,a <20130319215840.GA13599 at ruff dot mobi>