Thanks Jake for all the valuable information.

I'm following every email.

On Tue, Jan 10, 2023 at 5:05 PM jjs - mainphrame <j...@mainphrame.com> wrote:

> To clarify, the openvz guests can receive multicast traffic from the lan,
> but they are unable to send multicast traffic to the lan. The multicast
> packets are dropped on the way out, somewhere between the guest adapter and
> the host bridge.
>
> I'm not seeing any differences in sysctl settings between the ovz hosts
> and the working hosts, so firewall rules are the likely culprit.
>
> I'll continue to chip away at this as time allows and update with any
> findings.
>
> Jake
>
>
> On Sun, Jan 8, 2023 at 5:08 PM jjs - mainphrame <j...@mainphrame.com>
> wrote:
>
>> I've been doing some testing with ucarp, in debian VMs and containers.
>>
>> (ucarp is an implementation of VRRP, a means of providing a highly
>> available floating virtual IP within a cluster of machines)
>>
>> It works fine on proxmox VMs and CTs, and I was hoping to get it working
>> on openvz, but so far my attempts to get it fully up and running have
>> failed.
>>
>> Basically, both nodes become master, because neither node is seeing the
>> multicast traffic from the other.
>>
>> What is the secret of allowing multicast traffic to pass from openvz VMs
>> and CTs, onto the lan?
>>
>> Jake
>>
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