SR Linux: IS-IS over IPv4 unnumbered interfaces (#1142)

Requires SR Linux release 24.3.1 or above

Author: jbemmel

netsim/ansible/templates/initial/srlinux.j2

@@ -2,14 +2,20 @@
 - path: interface[name={{name}}]/subinterface[index={{index}}]
   val:
    description: "{{ intf.name | default( 'No description' )|replace('->','~')|regex_replace('[\\[\\]]','') }}"
-{% if 'ipv4' in intf and intf.ipv4 is string %}
+{% if 'ipv4' in intf and intf.ipv4|bool %}
    ipv4:
     admin-state: enable
+{%  if intf.ipv4 is string %}
     address:
     - ip-prefix: "{{ intf.ipv4 }}"
-{% if not is_system %}
+{%   if not is_system %}
       primary: [null]
-{% endif %}
+{%   endif %}
+{%  else %}
+    unnumbered:
+     admin-state: enable
+     interface: "system0.0"
+{%  endif %}
 {% endif %}
 {% if 'ipv6' in intf %}
    ipv6:

netsim/devices/srlinux.yml

@@ -54,9 +54,9 @@ features:
     unnumbered: False
   isis:
     unnumbered:
-      ipv4: False
+      ipv4: True
       ipv6: True
-      network: False
+      network: True
   vrf:
     keep_module: True
     ospfv2: True