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Maniphest T5862

Default MTU is not acceptable in some environments
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Description

Some NICs do not support MTU 1500, and if this kind of NIC is used for automated deployment, for example in clouds, such deployments cannot succeed.

An example is Google Cloud with gVNIC, which has a maximum MTU of 1460. With this NIC initial configuration without MTU cannot be applied, because it will fail with the Interface MTU too high, maximum supported MTU is 1460! message.

As a workaround, we can add an extra check to Cloud-init and set an MTU that can never exceed the maximum supported, but the problem needs a more persistent solution.

Details

Version
1.3, 1.4, 1.5
Is it a breaking change?
Perfectly compatible
Issue type
Bug (incorrect behavior)

Related Objects

Event Timeline

zsdc created this task.Dec 27 2023, 7:50 PM
pasik subscribed.Dec 27 2023, 8:33 PM
zsdc changed the task status from Open to In progress.Jan 4 2024, 1:27 PM

Workaround for clouds introduced in:
https://github.com/vyos/vyos-cloud-init/pull/68
https://github.com/vyos/vyos-cloud-init/pull/69

dmbaturin closed this task as Resolved.Jan 9 2024, 6:15 PM
dmbaturin claimed this task.
zsdc reopened this task as Open.Apr 4 2024, 2:18 PM
zsdc reassigned this task from dmbaturin to c-po.
zsdc added a subscriber: dmbaturin.
Viacheslav triaged this task as High priority.Apr 4 2024, 3:26 PM
c-po added a project: VyOS 1.4 Sagitta (1.4.0-epa3).Apr 6 2024, 12:11 PM

https://github.com/vyos/vyos-1x/pull/3265

c-po moved this task from Open to Finished on the VyOS 1.5 Circinus board.Apr 6 2024, 12:11 PM
Restricted Repository Identity mentioned this in rVYOSONEXca15e16f3f1b: Merge pull request #3265 from c-po/ethernet-mtu-T5862.Apr 7 2024, 2:39 PM
c-po mentioned this in rVYOSONEX8296cc727066: ethernet: T5862: default MTU is not acceptable in some environments.Apr 7 2024, 2:39 PM
c-po mentioned this in rVYOSONEXe86761fa1307: xml: T5862: drop defaultValue from mtu-68-16000.xml.i - use individual values.
Restricted Repository Identity mentioned this in rVYOSONEX11b2c478b765: xml: T5862: drop defaultValue from mtu-68-16000.xml.i - use individual values.Apr 7 2024, 2:40 PM
Restricted Repository Identity mentioned this in rVYOSONEXfbaa707f72ac: ethernet: T5862: default MTU is not acceptable in some environments.
Restricted Repository Identity mentioned this in rVYOSONEX96f7fb69fb6b: Merge pull request #3276 from vyos/mergify/bp/sagitta/pr-3265.Apr 7 2024, 5:37 PM
c-po closed this task as Resolved.Apr 7 2024, 6:59 PM
c-po moved this task from Need Triage to Finished on the VyOS 1.4 Sagitta (1.4.0-epa3) board.
dmbaturin removed a project: VyOS 1.5 Circinus.May 11 2024, 6:00 PM
dmbaturin changed Issue type from improvement to Bug (incorrect behavior).