Default MTU is not acceptable in some environments
Closed, ResolvedPublicBUG
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	zsdc
	Dec 27 2023, 7:50 PM

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

Difficulty level: Normal (likely a few hours)
Version: 1.3, 1.4, 1.5
Why the issue appeared?: Will be filled on close
Is it a breaking change?: Perfectly compatible
Issue type: Improvement (missing useful functionality)

Event Timeline

zsdc created this task.Dec 27 2023, 7:50 PM

pasik added a subscriber: pasik.Dec 27 2023, 8:33 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.Thu, Apr 4, 2:18 PM

zsdc reassigned this task from dmbaturin to c-po.

zsdc added a subscriber: dmbaturin.

Viacheslav triaged this task as High priority.Thu, Apr 4, 3:26 PM

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

c-po moved this task from Need Triage to Finished on the VyOS 1.5 Circinus board.Sat, Apr 6, 12:11 PM

c-po closed this task as Resolved.Sun, Apr 7, 6:59 PM

c-po moved this task from Need Triage to Finished on the VyOS 1.4 Sagitta (1.4.0-epa3) board.

Default MTU is not acceptable in some environmentsClosed, ResolvedPublicBUGActions

Description

Details

Event Timeline

Default MTU is not acceptable in some environments
Closed, ResolvedPublicBUG
Actions