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-rwxr-xr-xsrc/conf_mode/service_router-advert.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/conf_mode/service_router-advert.py b/src/conf_mode/service_router-advert.py
index 1b8377a4a..1dd973d67 100755
--- a/src/conf_mode/service_router-advert.py
+++ b/src/conf_mode/service_router-advert.py
@@ -93,6 +93,10 @@ def verify(rtradv):
if not (int(valid_lifetime) >= int(preferred_lifetime)):
raise ConfigError('Prefix valid-lifetime must be greater then or equal to preferred-lifetime')
+ if 'name_server' in interface_config:
+ if len(interface_config['name_server']) > 3:
+ raise ConfigError('No more then 3 IPv6 name-servers supported!')
+
if 'name_server_lifetime' in interface_config:
# man page states:
# The maximum duration how long the RDNSS entries are used for name