Force LAN-Port to use subsonic/sonos

Hi,
i am using Subsonic combined with my sonos-system an my Synology-NAS.
My NAS (DS3615xs) has 4 LAN-Ports. Is it possible to force subsonic/sonos which LAN-Port should be used to communicate with the SONOS-APP? Currently subsonic/sonos use any port, even if no network cable is plugged in.
Thanks for your help
Fraubi
i am using Subsonic combined with my sonos-system an my Synology-NAS.
My NAS (DS3615xs) has 4 LAN-Ports. Is it possible to force subsonic/sonos which LAN-Port should be used to communicate with the SONOS-APP? Currently subsonic/sonos use any port, even if no network cable is plugged in.
Thanks for your help
Fraubi