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-rw-r--r--docs/testing/user/userguide/testing_guide.rst7
1 files changed, 5 insertions, 2 deletions
diff --git a/docs/testing/user/userguide/testing_guide.rst b/docs/testing/user/userguide/testing_guide.rst
index e5462b3c..e8430601 100644
--- a/docs/testing/user/userguide/testing_guide.rst
+++ b/docs/testing/user/userguide/testing_guide.rst
@@ -226,8 +226,11 @@ this file should contain.
# If using https + no cacert, should add OS_INSECURE environment parameter.
export OS_INSECURE=True
- # External network name for allocating floating IPs.
- # The attribute 'external' for this network must be True.
+ # The name of a network with external connectivity for allocating floating
+ # IPs. It is required that at least one Neutron network with the attribute
+ # 'router:external=True' is pre-configured on the system under test.
+ # This network is used by test cases to SSH into tenant VMs and perform
+ # operations there.
export EXTERNAL_NETWORK=xxx