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-rw-r--r--python/vyos/configverify.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/python/vyos/configverify.py b/python/vyos/configverify.py
index e71e4e1c5..5a4d14c68 100644
--- a/python/vyos/configverify.py
+++ b/python/vyos/configverify.py
@@ -252,6 +252,13 @@ def verify_vlan_config(config):
Common helper function used by interface implementations to perform
recurring validation of interface VLANs
"""
+
+ # VLAN and Q-in-Q IDs are not allowed to overlap
+ if 'vif' in config and 'vif_s' in config:
+ duplicate = list(set(config['vif']) & set(config['vif_s']))
+ if duplicate:
+ raise ConfigError(f'Duplicate VLAN id "{duplicate[0]}" used for vif and vif-s interfaces!')
+
# 802.1q VLANs
for vlan in config.get('vif', {}):
vlan = config['vif'][vlan]