[PVE-User] ip address on both bond0 and vmbr0

dorsy dorsyka at yahoo.com
Tue Mar 23 11:51:08 CET 2021


Also, if You look at the examples, they do not use a bond and VM bridge 
with 2 addresses, in the first, an IP is on the bond, the VM bridge is 
another physical IF.

The second example shows the VM bridge is over the bond, and the IP is 
on the bridge IF (no IP on the bond there).

On 3/23/2021 11:42 AM, mj wrote:
> Hi all,
>
> First some info:
> 10.0.0.0/24 is ceph storage
> 192.168.143.0/24 is our LAN
>
> I am trying to make this /etc/networking/interfaces work in in pve:
>
>> auto enp2s0f0
>> iface enp2s0f0 inet manual
>> #mlag1
>>
>> auto enp2s0f1
>> iface enp2s0f1 inet manual
>> #mlag2
>>
>> iface enp0s25 inet manual
>> #management
>>
>> auto bond0
>> iface bond0 inet static
>>         address 10.0.0.10/24
>>         bond-slaves enp2s0f0 enp2s0f1
>>         bond-miimon 100
>>         bond-mode active-backup
>>         bond-primary enp2s0f0
>>
>> auto vmbr0
>> iface vmbr0 inet static
>>         address 192.168.143.10/24
>>         gateway 192.168.143.1
>>         bridge-ports bond0
>>         bridge-stp off
>>         bridge-fd 0
>
> We will connect pve servers to two mlagged arista 40G switches. The 
> 10.0.0.0/24 ceph network will remain local on the two aristas, and 
> 192.168.143.0/24 will be routed to our core switch.
>
> The VM IPs are in the LAN 192.168.143.0/24 range, and obviously don't 
> require access to 10.0.0.0/24
>
> We connect the VMs to vmbr0 and assign VLANs to them by configuring a 
> VLAN tag in the proxmox VM config. This works. :-)
>
> However, assigning the IP address to bond0 does NOT work. The IP 
> address is ignored. bond0 works, but is IP-less. Adding the IP address 
> manually after boot works, using:
>> ip addr add 10.0.0.10/24 dev bond0
>
> Why is this ip address not assigned to bond0 at boot time?
>
> Is it not possible to have an IP on both bond0 and vmbr0, when bond0 
> is also used as a bridge port?
>
> The setup is based (freely) on the pve docs:
> https://pve.proxmox.com/wiki/Network_Configuration#_linux_bond
>
> Thanks!
>
> MJ
>
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