return None
+
# There are possibilities when multiple xs-network-uuids are set for a bridge.
# In cases like that, we should choose the bridge-id associated with the bridge
# name.
xapi_down = True
return default
+
# By default, the "bridge-id" external id in the Bridge table is the
# same as "xs-network-uuids". This may be overridden by defining a
# "nicira-bridge-id" key in the "other_config" field of the network