From: Dominik Csapak <d.csapak@proxmox.com>
To: martin.konold@konsec.com,
Proxmox VE user list <pve-user@lists.proxmox.com>
Subject: Re: [PVE-User] mtu setting for virtual ethernet
Date: Tue, 23 Mar 2021 13:29:08 +0100 [thread overview]
Message-ID: <8e91028c-36ca-53d3-b6ab-0d1153dda1cc@proxmox.com> (raw)
In-Reply-To: <c7502c66b470723af6f97c033b71f43d@konsec.com>
On 3/23/21 13:03, Konold, Martin wrote:
> Hi Proxmox Users,
>
> I learned from the Proxmox forum that appending mtu=1 to the network
> definition of a virtual machine instructs the virtual ethernet device to
> inherit the mtu from the corresponding bridge.
>
> In my case
>
> net0: virtio=FA:FF:FF:FF:FF:D8,bridge=vmbr15,mtu=1
>
> and the bridge definition
>
> iface vmbr15 inet static
> address 10.21.15.11/24
> bridge-ports enp35s0.4015
> bridge-stp off
> bridge-fd 0
> bridge-vlan-aware yes
> bridge-vids 2-4094
> mtu 1400
>
> According to my tests this seams to work indeed. The guest OS shows the
> 1400 mtu.
>
> Question 1: Can the mtu=1 (magic value for auto mtu inheritance) be made > the default?
probably not because of backwards compatibility (live-migration etc.)
but maybe we could (should?) either add it as default for
new vms in the webui, or expose it as a gui field
would you mind opening a feature request? https://bugzilla.proxmox.com
>
> Question 2: It seams that appending mtu=1 breaks the webUI. I get
> "Unable to parse network options".
thanks for reporting, i sent a patch on the devel list to fix that
>
> Kind Regards
> ppa. Martin Konold
>
> --
> Martin Konold - Prokurist, CTO
> KONSEC GmbH - make things real
> Amtsgericht Stuttgart, HRB 23690
> Geschäftsführer: Andreas Mack
> Im Köller 3, 70794 Filderstadt, Germany
>
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prev parent reply other threads:[~2021-03-23 12:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 12:03 Konold, Martin
2021-03-23 12:29 ` Dominik Csapak [this message]
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