Multi VLAn with iproute2

[unixpert]

Hello everyone,

Can you help me this error ?

I am using Proxmox 1.9. I config two vlan on interface eth0. This is my config:

auto lo
iface lo inet loopback


iface eth0 inet manual


iface eth1 inet manual


auto vmbr117
iface vmbr117 inet static
        address  100.100.100.117
        netmask  255.255.255.240
        gateway  100.100.100.116
        bridge_ports eth0.117
        bridge_stp off
        bridge_fd 0
        post-up echo 1 > /proc/sys/net/ipv4/conf/vmbr117/proxy_arp
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward


auto vmbr219
iface vmbr219 inet static
        address  100.100.100.219
        netmask  255.255.255.240
        bridge_ports eth0.219
        bridge_stp off
        bridge_fd 0
        post-up echo 1 > /proc/sys/net/ipv4/conf/vmbr219/proxy_arp
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up ip route add table vlan219 default via 100.100.100.218 dev vmbr219
        post-up ip rule add from 100.100.100.217/24 table vlan219
        post-down ip route del table vlan219 default via 100.100.100.218 dev vmbr219
        post-down ip rule del from 100.100.100.217/24 table vlan219

node00x:~# ip rule
0:      from all lookup local
32765:  from 100.100.100.217/24 lookup vlan219
32766:  from all lookup main

32767:  from all lookup default

With this configuration, two vlans can connect internet.

My problem: VLAN 219 suddenly lost connection after several hours. I must remove ip address, after that re-add ip, then vps can connect again. As:

vzctl set 100100 --ipdel
vzctl set 100100 --ipadd

refer: https://pve.proxmox.com/wiki/Network_Model

Looking forward your anwser!

Thank you very much.