diff --git a/cli/documentation/en_US/address-space/identifier-rule b/cli/documentation/en_US/address-space/identifier-rule
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+++ b/cli/documentation/en_US/address-space/identifier-rule
@@ -0,0 +1,2 @@
+Set an address-space identifier rule and enter submode. Devices are
+assigned into address-spaces based on identifier-rules.