router-advert: T7389: Duplicate prefix safeguard

Change autoignoreprefixes config template and add smoketests

1 files changed, 11 insertions, 3 deletions

diff --git a/data/templates/router-advert/radvd.conf.j2 b/data/templates/router-advert/radvd.conf.j2
index e37cfde6c..34f8e1f6d 100644
--- a/data/templates/router-advert/radvd.conf.j2
+++ b/data/templates/router-advert/radvd.conf.j2
@@ -57,12 +57,20 @@ interface {{ iface }} {
     };
 {%             endfor %}
 {%         endif %}
-{%         if iface_config.auto_ignore is vyos_defined %}
+{%         if iface_config.prefix is vyos_defined and "::/64" in iface_config.prefix %}
+{%             if iface_config.auto_ignore is vyos_defined or iface_config.prefix | count > 1 %}
     autoignoreprefixes {
-{%             for auto_ignore_prefix in iface_config.auto_ignore %}
+{%                 if iface_config.auto_ignore is vyos_defined %}
+{%                     for auto_ignore_prefix in (iface_config.auto_ignore + iface_config.prefix | list) | reject("eq", "::/64") | unique %}
         {{ auto_ignore_prefix }};
-{%             endfor %}
+{%                     endfor %}
+{%                 else %}
+{%                     for auto_ignore_prefix in iface_config.prefix | reject("eq", "::/64") %}
+        {{ auto_ignore_prefix }};
+{%                     endfor %}
+{%                 endif %}
     };
+{%             endif %}
 {%         endif %}
 {%         if iface_config.prefix is vyos_defined %}
 {%             for prefix, prefix_options in iface_config.prefix.items() %}