Feat(eos_designs): Uplink type 'lan' for WAN routers

[ClausHolbechArista]

Change Summary

Uplink type 'lan' for WAN routers

Component(s) name

arista.avd.eos_designs

Proposed changes

        # `uplink_type` must be `p2p`, `p2p-vrfs` or `lan` if `vtep` or `underlay_router` is true.
        #
        # For `p2p-vrfs`, the uplinks are configured as L3 interfaces with a subinterface for each VRF
        # in `network_services` present on both the uplink and the downlink switch.
        # The subinterface ID is the `vrf_id`.
        # 'underlay_router' and 'network_services.l3' must be set to true.
        # VRF `default` is always configured on the physical interface using the underlay routing protocol.
        # All subinterfaces use the same IP address as the physical interface.
        # Multicast is not supported.
        # Only BGP is supported for subinterfaces.
        #
        # For `lan`, a single uplink interface is supported and will be configured as an L3 Interface with
        # subinterfaces for each SVI defined under the VRFs in `network_services` as long as the uplink switch also
        # has the VLAN permitted by tag/tenant filtering.
        uplink_type: <str; "p2p" | "port-channel" | "p2p-vrfs" | "lan"; default="p2p">

How to test

Checklist

User Checklist

• N/A

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)

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[github-actions]

Conflicts have been resolved. A maintainer will review the pull request shortly.