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-rw-r--r--docs/tcp_replication.md6
1 files changed, 5 insertions, 1 deletions
diff --git a/docs/tcp_replication.md b/docs/tcp_replication.md
index ba9e874d07..a0b1d563ff 100644
--- a/docs/tcp_replication.md
+++ b/docs/tcp_replication.md
@@ -209,7 +209,7 @@ Where `<token>` may be either:
  * a numeric stream_id to stream updates since (exclusive)
  * `NOW` to stream all subsequent updates.
 
-The `<stream_name>` is the name of a replication stream to subscribe 
+The `<stream_name>` is the name of a replication stream to subscribe
 to (see [here](../synapse/replication/tcp/streams/_base.py) for a list
 of streams). It can also be `ALL` to subscribe to all known streams,
 in which case the `<token>` must be set to `NOW`.
@@ -234,6 +234,10 @@ in which case the `<token>` must be set to `NOW`.
 
    Used exclusively in tests
 
+### REMOTE_SERVER_UP (S, C)
+
+   Inform other processes that a remote server may have come back online.
+
 See `synapse/replication/tcp/commands.py` for a detailed description and
 the format of each command.