[OVH][SCALE] No network after with bridge to router

[chencho]

Hi all.

The Scale servers from OVH cannot use bridge mode. we need to use router mode instead.

Using this guide https://pve.proxmox.com/wiki/Network_Configuration#_routed_configuration we can configure and access our server:

auto lo
iface lo inet loopback

iface enp193s0f0np0 inet manual

auto enp193s0f0np0
iface enp193s0f0np0 inet static
  address 135.XXX:XXX.XXX/32 ----> Server IP
  gateway 100.XXX.0.1. ------> Server gateway
  hwaddress XX:XX:XX:XX:XX
  post-up echo 1 > /proc/sys/net/ipv4/ip_forward
  post-up echo 1 > /proc/sys/net/ipv4/conf/eno1/proxy_arp


auto vmbr0
iface vmbr0 inet static
        address  51.XXX.XXX.XXX/28 ---> Failover to attach to vm
        bridge-ports none
        bridge-stp off
        bridge-fd 0

But when we create de CT, only bridge is available to select. If we create the CT and do pct enter, it can't access to internet.

Then, we change network config as OVH describes here https://docs.ovh.com/us/en/dedicated/proxmox-network-hg-scale/

auto lo
iface lo inet loopback

auto enp193s0f0np0
iface enp193s0f0np0 inet manual

auto enp193s0f1np1
iface enp193s0f1np1 inet manual

auto enp133s0f0np0
iface enp133s0f0np0 inet manual

auto enp133s0f1np1
iface enp133s0f1np1 inet manual

auto bond0
iface bond0 inet dhcp
    bond-slaves enp193s0f0np0 enp193s0f1np1
        bond-miimon 100
    bond-mode 802.3ad
        post-up echo 1 > /proc/sys/net/ipv4/conf/bond0/proxy_arp
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward

auto vmbr0
iface vmbr0 inet static
    address 192.168.0.1
        netmask 255.255.255.255
    bridge-ports none
    bridge-stp off
    bridge-fd 0
        post-up ip route add XXX.XXX.XXX.XXX/32 dev vmbr0. ------> Ip failover

Result: No access to our server

Then, change this config to forze using static ip:

auto lo
iface lo inet loopback

auto enp193s0f0np0
iface enp193s0f0np0 inet manual

auto enp193s0f1np1
iface enp193s0f1np1 inet manual

auto enp133s0f0np0
iface enp133s0f0np0 inet manual

auto enp133s0f1np1
iface enp133s0f1np1 inet manual

auto bond0
iface bond0 inet static
  address 135.XXX:XXX.XXX/32 ----> Server IP
  gateway 100.XXX.0.1. ------> Server gateway
  hwaddress XX:XX:XX:XX:XX
    bond-slaves enp193s0f0np0 enp193s0f1np1
        bond-miimon 100
    bond-mode 802.3ad
        post-up echo 1 > /proc/sys/net/ipv4/conf/bond0/proxy_arp
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward

auto vmbr0
iface vmbr0 inet static
    address 192.168.0.1
        netmask 255.255.255.255
    bridge-ports none
    bridge-stp off
    bridge-fd 0
        post-up ip route add 51.254.144.227/32 dev vmbr0

Same result, we cannot access to our server