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-rw-r--r--resources/libraries/python/InterfaceUtil.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/resources/libraries/python/InterfaceUtil.py b/resources/libraries/python/InterfaceUtil.py
index ebbd4f25fa..7e474abf8d 100644
--- a/resources/libraries/python/InterfaceUtil.py
+++ b/resources/libraries/python/InterfaceUtil.py
@@ -212,6 +212,10 @@ class InterfaceUtil:
raise ValueError(f"Unknown if_type: {if_type}")
if node[u"type"] == NodeType.DUT:
+ if sw_if_index is None:
+ raise ValueError(
+ f"Interface index for {interface} not assigned by VPP."
+ )
if state == u"up":
flags = InterfaceStatusFlags.IF_STATUS_API_FLAG_ADMIN_UP.value
elif state == u"down":