T5339: GENEVE add option to use ipv4 instead of ethernet

[fett0]

by default GENEVE interfaces are type Ethernet, this option allows to switch to IP header

https://manpages.debian.org/testing/iproute2/ip-link.8.en.html

Change Summary

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T5330

Component(s) name

geneve

Proposed changes

How to test

using vyos-cli to configure geneve interfaces :

vyos@vyos# run show configuration commands | match geneve
set interfaces geneve gnv1 parameters ip innerproto
set interfaces geneve gnv1 remote '172.16.50.1'
set interfaces geneve gnv1 vni '10'

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly