X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=test%2Fvpp_interface.py;h=a6717797309efe9f0a4fb6707e7e300138de1741;hb=5ef9ca6c0de25993bde0dbc354cc4a5bc83ab0eb;hp=9bfa880e1c98c8f3070af545d3e7005cd1ab412f;hpb=e83aa456bdb885277ba615808b63a33cb5a8e352;p=vpp.git

diff --git a/test/vpp_interface.py b/test/vpp_interface.py
index 9bfa880e1c9..a6717797309 100644
--- a/test/vpp_interface.py
+++ b/test/vpp_interface.py
@@ -237,6 +237,9 @@ class VppInterface(object):
             self.sw_if_index, mac.packed)
 
     def set_sw_if_index(self, sw_if_index):
+        if sw_if_index > 255:
+            raise RuntimeError("Don't support sw_if_index values "
+                               "greater than 255.")
         self._sw_if_index = sw_if_index
 
         self.generate_remote_hosts()