T7076: VPP check ethernet interface exist

[natali-rs1985]

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)
• Other (please describe):

Related Task(s)

• https://vyos.dev/T7076

Related PR(s)

vyos/vyos-1x#4327

Proposed changes

How to test

vyos@vyos# ls /sys/class/net/
dum0  eth0  eth1  eth2  eth3  lo  pim6reg
[edit]
vyos@vyos# set vpp settings interface dum0

  Error: dum0 is not an ehternet interface



  Invalid interface name
  Value validation failed
  Set failed

[edit]
vyos@vyos# set vpp settings interface eth99

  Error: eth99 does not exist in the system



  Invalid interface name
  Value validation failed
  Set failed

[edit]
vyos@vyos# set vpp settings interface eth1
[edit]
vyos@vyos#

Checklist:

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

[dmbaturin]

Please limit the constaint to only allow ethernet interfaces.

[natali-rs1985]

Please limit the constaint to only allow ethernet interfaces.

Done