ifconfig: T3806: "ipv6 address no_default_link_local" required for MTU < 1280

This commit also extends the smoketest to verify that the exception for this
error is raised.

(cherry picked from commit 84a429b41175b95634ec9492e0cf3a564a47abdd)

1 files changed, 12 insertions, 12 deletions

diff --git a/python/vyos/configverify.py b/python/vyos/configverify.py
index cff673a6e..ce7e76eb4 100644
--- a/python/vyos/configverify.py
+++ b/python/vyos/configverify.py
@@ -67,22 +67,22 @@ def verify_mtu_ipv6(config):
         min_mtu = 1280
         if int(config['mtu']) < min_mtu:
             interface = config['ifname']
-            error_msg = f'IPv6 address will be configured on interface "{interface}" ' \
-                        f'thus the minimum MTU requirement is {min_mtu}!'
+            error_msg = f'IPv6 address will be configured on interface "{interface}",\n' \
+                        f'the required minimum MTU is {min_mtu}!'
 
-            for address in (dict_search('address', config) or []):
-                if address in ['dhcpv6'] or is_ipv6(address):
-                    raise ConfigError(error_msg)
+            if 'address' in config:
+                for address in config['address']:
+                    if address in ['dhcpv6'] or is_ipv6(address):
+                        raise ConfigError(error_msg)
 
-            tmp = dict_search('ipv6.address', config)
-            if tmp and 'no_default_link_local' not in tmp:
-                raise ConfigError('link-local ' + error_msg)
+            tmp = dict_search('ipv6.address.no_default_link_local', config)
+            if tmp == None: raise ConfigError('link-local ' + error_msg)
 
-            if tmp and 'autoconf' in tmp:
-                raise ConfigError(error_msg)
+            tmp = dict_search('ipv6.address.autoconf', config)
+            if tmp != None: raise ConfigError(error_msg)
 
-            if tmp and 'eui64' in tmp:
-                raise ConfigError(error_msg)
+            tmp = dict_search('ipv6.address.eui64', config)
+            if tmp != None: raise ConfigError(error_msg)
 
 def verify_tunnel(config):
     """