Move to vppcfg based configs - generate the initial config in vpp.service. Needs 20260406-2

overlays/_common/vpp/etc/vpp/vppcfg.yaml.j2

@@ -0,0 +1,42 @@
+loopbacks:
+  loop0:
+    description: 'Core: vpp{{lab.id}}-{{node.id}}'
+    mtu: 9000
+    lcp: loop0
+    addresses: [ {{node.loopback.ipv4}}, {{node.loopback.ipv6}} ]
+interfaces:
+  GigabitEthernet10/0/0:
+{% if node.id == 0 %}
+    description: 'Gi10/0/0 is connected to lab.ipng.ch:lab{{lab.id}}'
+    addresses: [ 192.168.{{10+lab.id}}.{{5+2*node.id}}/31, 2001:678:d78:2{{lab.id}}1::fffe/112 ]
+{% else %}
+    description: 'Gi10/0/0 is connected to vpp{{lab.id}}-{{node.id-1}}:Gi10/0/1'
+    addresses: [ 192.168.{{10+lab.id}}.{{5+2*node.id}}/31, 2001:678:d78:2{{lab.id}}1::{{node.id}}:{{lab.id}}{{node.id}}/112 ]
+    mpls: true
+{% endif %}
+    lcp: e0
+    mtu: 9000
+    sflow: true
+  GigabitEthernet10/0/1:
+{% if node.id < 3 %}
+    description: 'Gi10/0/1 is connected to vpp{{lab.id}}-{{node.id+1}}:Gi10/0/0'
+    addresses: [ 192.168.{{10+lab.id}}.{{6+2*node.id}}/31, 2001:678:d78:2{{lab.id}}1::{{node.id+1}}:{{lab.id}}{{node.id}}/112 ]
+    mpls: true
+{% else %}
+    description: 'Gi10/0/1 is free to use'
+    state: down
+{% endif %}
+    lcp: e1
+    mtu: 9000
+    sflow: true
+  GigabitEthernet10/0/2:
+    description: 'Gi10/0/2 is connected to host{{lab.id}}-0:enp16s0f{{node.id}}'
+    lcp: e2
+    mtu: 9000
+    sflow: true
+  GigabitEthernet10/0/3:
+    description: 'Gi10/0/3 is connected to host{{lab.id}}-1:enp16s0f{{node.id}}'
+    lcp: e3
+    mtu: 9000
+    sflow: true
+