[PVE-User] Are two bridges to the same network possible?

Chris Hofstaedtler | Deduktiva chris.hofstaedtler at deduktiva.com
Tue Dec 17 21:42:29 CET 2019

* Frank Thommen <f.thommen at dkfz-heidelberg.de> [191217 20:29]:
> (how) can I connect two virtual bridges to the same network (using the same
> gateway)?
> Our currently-being-built-up PVE server has four Linux network bonds
> connecting to two three networks. One is being used for the PVE server
> itself (administration, web ui ecc), the other three for virtual machines
> which will reside in three different networks.  One of these three networks
> is the same as the one where the PVE server is residing, but I'd still like
> to use separate NICs for the VMs.
> The server itself is attached to the default vmbr0 (using bond0).  But as
> soon as I want to configure a second bridge vmbr1 (using bond1) to the same
> network, PROXMOX complains that the default gateway already exists.
> Is it technically possible/supported to have multiple bridges to the same
> network (with the same gateways)?

Do you actually need IP traffic on the host on the second interface?
If not, then don't configure IP addresses, gateways, etc... 

Chris Hofstaedtler / Deduktiva GmbH (FN 418592 b, HG Wien)
www.deduktiva.com / +43 1 353 1707

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