diff --git a/docs/rn/0.21.md b/docs/rn/0.21.md
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@@ -0,0 +1,48 @@
+# Release 0.21
+:material-calendar: 2021-12-02
+
+## SR Linux startup-config in CLI format
+SR Linux nodes have had support for startup configuration for a very long time. The nuance was that users had to dump the whole running config in JSON format to use it as a startup.
+
+While this works, it is not the most straightforward way. Usually, users create some use case by dabbing commands over the CLI, and it would be great to offer them a chance to apply that extra config on top of the factory config when SR Linux node boots.
+
+And that is exactly what has been added in v0.21.0! Please meet [startup-config in CLI format](../manual/kinds/srl.md#cli).
+
+Now, if you have a file with CLI commands, you can apply this short snippet to the factory config making the use case ready when SR Linux NOS starts.
+
+=== "CLI Config"
+    ```bash
+    # contents of myconfig.cli
+    set / network-instance default protocols bgp admin-state enable
+    set / network-instance default protocols bgp router-id 10.10.10.1
+    set / network-instance default protocols bgp autonomous-system 65001
+    set / network-instance default protocols bgp group ibgp ipv4-unicast admin-state enable
+    set / network-instance default protocols bgp group ibgp export-policy export-lo
+    set / network-instance default protocols bgp neighbor 192.168.1.2 admin-state enable
+    set / network-instance default protocols bgp neighbor 192.168.1.2 peer-group ibgp
+    set / network-instance default protocols bgp neighbor 192.168.1.2 peer-as 65001
+    ```
+=== "Topology"
+    ```yaml
+    name: srl_lab
+    topology:
+    nodes:
+        srl1:
+        kind: srl
+        type: ixr6
+        image: ghcr.io/nokia/srlinux
+        # a path to the partial config in CLI format relative to the current working directory
+        startup-config: myconfig.cli
+    ```
+
+With that addition, you can ship your use cases without carrying the full SR Linux config files, just by checking in the small CLI-styled snippets.
+
+## Auto enabled SR Linux interfaces
+Thanks to @jbemmel for suggesting enabling SR Linux interfaces referenced in the `links` section of a topology file.
+
+The interfaces will come up with Admin Up status when SR Linux finishes booting.
+
+## Miscellaneous
+* Arista cEOS nodes will keep the same System MAC upon re-deployments. This is done to persist the same System MAC for systems like CVP.
+* Fixes to containerlab JSON schema
+* hellt/vrnetlab 0.6.2 added with support for Mikrotik RouterOS v7
diff --git a/mkdocs.yml b/mkdocs.yml
index 22006b755..996153b6d 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -84,6 +84,7 @@ nav:
           - Leaf-spine topology: lab-examples/templated01.md
           - 5-stage Clos topology: lab-examples/templated02.md
   - Release notes:
+      - "0.21": rn/0.21.md
       - "0.20": rn/0.20.md
       - 0.19: rn/0.19.md
       - 0.18: rn/0.18.md