[ovirt-users] Network redundancy with Manual balancing per VLAN

[Edward Haas]

On Sun, Jun 26, 2016 at 4:37 PM, Yevgeny Zaspitsky <yzaspits at redhat.com>
wrote:

> Dan, Edy,
>
> Could you guys answer this?
>
> IIUC, the requirements are:
>
>    - stream the traffic of few VLANs(network roles) through a single bond
>    - be able to bind a VLAN to a bond slave with an option of fallback
>    - have redundancy
>    - assign different QoS to every VLAN (my addition)
>
> I guess this is a new RFC that we do not support currently, but would we
> be able to provide in any future?
>
> ---------- Forwarded message ----------
> From: Fernando Frediani <fernando.frediani at upx.com.br>
> Date: Sat, Jun 25, 2016 at 11:17 PM
> Subject: [ovirt-users] Network redundancy with Manual balancing per VLAN
> To: users at ovirt.org
>
>
> Hello,
>
> In VMware it is possible to bond two network interfaces and for each
> Portgroup (equivalent to a VLAN) is possible to tell which of the physical
> interfaces underneath it you wish the traffic to flow primarily and which
> stays as secondary(bond mode=1 equivalent). So for certain VLANs
> (Management, Live Migration, etc) is possible to force traffic flow via one
> physical NIC of the bond and for other VLANs (Virtual Machine's traffic)
> outs via the other NIC with failover to each other should a cable or switch
> fails.
>
> This is specially good for better utilize the fewer NICs available and
> still have redundancy.
>
> In oVirt it is also possible to have bonds, but would it still be possible
> to do that same and favor the traffic per VLAN basis ? I guess it is
> something related to Linux Bond module but perhaps someone has done this
> already.
>
>


> Thanks
>
> Fernando
>
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>
Hello Fernando,

As you mentioned, oVirt is using the Linux Bond and the solution you are
looking for is not supported.
The oVirt way to handle this is by applying QoS on the networks, providing
the guaranteed rates for each and utilizing the bond for throughput beyond
the one link limit.

With the introduction of OVS as an alternative networking infrastructure
for the hosts, you could create a hook that implements some special
functionality, but ovs is not in yet.

Thanks,
Edy.
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