From: Stefan Hanreich <s.hanreich@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH pve-docs v3 1/1] qm: document new default behavior for mtu setting
Date: Thu, 17 Jul 2025 19:50:12 +0200 [thread overview]
Message-ID: <20250717175012.606372-4-s.hanreich@proxmox.com> (raw)
In-Reply-To: <20250717175012.606372-1-s.hanreich@proxmox.com>
The default behavior changed from setting 1500 MTU to inheriting the
bridge MTU, if the MTU key for network devices is unset.
Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
---
qm.adoc | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/qm.adoc b/qm.adoc
index 393242a..0548c46 100644
--- a/qm.adoc
+++ b/qm.adoc
@@ -924,10 +924,9 @@ but not via the web UI.
You can also skip adding a network device when creating a VM by selecting *No
network device*.
-You can overwrite the *MTU* setting for each VM network device. The option
-`mtu=1` represents a special case, in which the MTU value will be inherited
-from the underlying bridge.
-This option is only available for *VirtIO* network devices.
+You can overwrite the *MTU* setting for each VM network device manually. Leaving
+the field empty or setting `mtu=1` will inherit the MTU from the underlying
+bridge. This option is only available for *VirtIO* network devices.
.Multiqueue
If you are using the VirtIO driver, you can optionally activate the
--
2.39.5
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next prev parent reply other threads:[~2025-07-17 17:49 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-17 17:50 [pve-devel] [PATCH docs/manager/qemu-server v3 0/3] Make VirtIO network devices inherit MTU from bridge by default Stefan Hanreich
2025-07-17 17:50 ` [pve-devel] [PATCH qemu-server v3 1/1] net: automatically set host_mtu to bridge mtu for virtio netdevs Stefan Hanreich
2025-07-17 18:39 ` Thomas Lamprecht
2025-07-17 17:50 ` [pve-devel] [PATCH pve-manager v3 1/1] qemu: network: adjust MTU emptyText to match new default behavior Stefan Hanreich
2025-07-17 18:39 ` Thomas Lamprecht
2025-07-17 17:50 ` Stefan Hanreich [this message]
2025-07-17 18:39 ` [pve-devel] [PATCH pve-docs v3 1/1] qm: document new default behavior for mtu setting Thomas Lamprecht
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