l2tpv3: T2241: fix falling out of bridge when changing settings

Previously, the interface was always deleted and recreated, which
removed it from the bridge.
- always re-add the interface back to any bridge it is part of in
  case it is deleted and recreated

1 files changed, 4 insertions, 0 deletions

diff --git a/src/conf_mode/interfaces-l2tpv3.py b/src/conf_mode/interfaces-l2tpv3.py
index 90a7ecdc8..fe5de3431 100755
--- a/src/conf_mode/interfaces-l2tpv3.py
+++ b/src/conf_mode/interfaces-l2tpv3.py
@@ -264,6 +264,10 @@ def apply(l2tpv3):
         if not l2tpv3['disable']:
             l.set_admin_state('up')
 
+        # re-add ourselves to any bridge we might have fallen out of
+        if l2tpv3['is_bridge_member']:
+            l.add_to_bridge(l2tpv3['is_bridge_member'])
+
     return None
 
 if __name__ == '__main__':