How to create Cluster with dedicated NIC (OVH vrack) ?

Hello,

I'm working with 2 servers from OVH (hosting provider). Each one has its own public IP, and also its own private IP (172.16.0.1 and 172.16.0.2) on a separated NIC (interface eth1). The private IPs can communicate with multicast thanks to their new "vrack 1.5" technology.

I created a cluster on the first server (private IP: 172.16.0.1) (pvecm create my-own-cluster). Then on the second server I did pvecm add 172.16.0.1.

This led me to a:

In the meantime I realized I had to modify quorum. So I did on the first server pvecm expected 1, which didn't change anything. As the second server was still waiting, I did a CTRL-C. On each server, I ran a pvecm status and saw the Node addresses is the public IP (on both servers).

So my questions are:

1. How to specify the network interface / IP address when creating a cluster or adding a node ?
2. How could I do this provided I've already tried to create a cluster

# pveversion
pve-manager/3.1-24/060bd5a6 (running kernel: 2.6.32-26-pve)

Thanks in advance
Matthieu