Feat(eos_cli_config_gen): Add ipv6 dhcp relay to vlan/ethernet-interfaces

[emilarista]

Change Summary

Adds ipv6_dhcp_relay_destinations data model to vlan interfaces.

Related Issue(s)

Fixes #2310

Component(s) name

arista.avd.eos_cli_config_gen

Proposed changes

vlan_interfaces:
  Vlan123:
    ipv6_dhcp_relay_destinations:
      - address: < ipv6 address >
        vrf: < vrf >
        local_interface: < interface >
        source_address: < ipv6 address >
        link_address: < ipv6 address >

How to test

Tested with molecule and on physical device.

Repository Checklist

• My code has been rebased from devel before I start
• I have read the CONTRIBUTING document.
• My change requires a change to the documentation and documentation have been updated accordingly.
• I have updated molecule CI testing accordingly. (check the box if not applicable)

[gmuloc]

Two questions:

1. is it on purpose to not have this figuring in the documentation (I guess that is fine as we would still have the interface config in the documentation)
2. seems like this is also supported under ethernet interfaces but not yet in AVD - is there a plan to add it there afterwards?

[emilarista]

Two questions:

1. is it on purpose to not have this figuring in the documentation (I guess that is fine as we would still have the interface config in the documentation)

I did not add a table for this as we currently don't have it for ipv4 helpers, we rely on interface config documentation for that. I can go ahead and add it for ipv6 dhcp if desired and open a new PR to add it for ipv4 helpers as well.

2. seems like this is also supported under ethernet interfaces but not yet in AVD - is there a plan to add it there afterwards?

Good point, i will add it to ethernet interfaces as well.

[gmuloc]

Two questions:

1. is it on purpose to not have this figuring in the documentation (I guess that is fine as we would still have the interface config in the documentation)

I did not add a table for this as we currently don't have it for ipv4 helpers, we rely on interface config documentation for that. I can go ahead and add it for ipv6 dhcp if desired and open a new PR to add it for ipv4 helpers as well.

2. seems like this is also supported under ethernet interfaces but not yet in AVD - is there a plan to add it there afterwards?

Good point, i will add it to ethernet interfaces as well.

No need for 1 I would say :) Thanks!

[gmuloc]

Provided CI finishes, LGTM