Which Gateway in Static Route- 2 Nic Configuration

[AykonMan]

Hi Members,

I am setting up a pbx with 2 nics on the on-prem box.

The provider is a generic SIP. I saw the sample below configs in one of the threads and need help to validate what i have done and to ask which gateway ip i should use here.

Please help a friend.



# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug enp0s31f6
auto enp0s31f6
iface enp0s31f6 inet static
address 192.168.30.15/24
gateway 192.168.30.1
dns-nameservers X.X.X.X

# The SIP network Provider Interface (Cable from Provider into 2nd NIC)
allow-hotplug enp3s0
auto enp3s0
iface enp3s0 inet static
address <Provider SIP IP Address>

#static routes
up route add -net <Provider SIP IP Address> gw <Which gateway should i use?> dev enp3s0


thanks

 

[eddv123]

It maybe of use to have a look over this guide, it covers the 2 NIC/static route scenario:

https://www.3cx.com/blog/docs/network-configurations-supported-3cx-phone-system/

 

[AykonMan]

this is useful @eddv123 , I check and found specfically a scenerio that sort of resembles my concerns, but it windows specific whereas i am using the Linux distro.

that is:
Multiple internet gateways (used by ISPs that offer VoIP Services)

My main concern is, given the configs that i shared, should i ignore the gateway given by the SIP Provider/ISP and just use the gateway to the voice VLAN in the static routing?

thanks for the assistance.

 

[eddv123]

I believe this string here will cover what is required for Linux and multiple NIC cards:
https://www.3cx.com/community/threads/2-network-cards-help.51813/

Have a look and see if it suits your scenario.