netwatch-notify: support dynamic address updatechange-50

1 files changed, 9 insertions, 0 deletions

diff --git a/doc/netwatch-notify.md b/doc/netwatch-notify.md
index a3d8ccd..ff1eae9 100644
--- a/doc/netwatch-notify.md
+++ b/doc/netwatch-notify.md
@@ -52,6 +52,15 @@ suppress notification if the parent host is down:
 Note that every configured parent in a chain increases the check count
 threshould by one.
 
+The host address can be updated dynamically. Give extra parameter `resolve`
+with a resolvable name:
+
+    / tool netwatch add comment="notify, hostname=example.com, resolve=example.com";
+
+But be warned: Dynamic updates will probably cause issues if the name has
+more than one record in dns - a high rate of configuration changes (and flash
+writes) at least.
+
 Also notification settings are required for e-mail and telegram.
 
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