doc: Add CLI documentation for new advertise high metrics command

Update isisd docs with advertise-high-metrics config.

Signed-off-by: Isabella de Leon <ideleon@microsoft.com>

diff --git a/doc/user/isisd.rst b/doc/user/isisd.rst
index d68fa67259bb127820d208a8b1a23830d7dbaf2f..055841d230ae8514fcdeb46e3ffdfa91b755ad60 100644 (file)
--- a/doc/user/isisd.rst
+++ b/doc/user/isisd.rst
@@ -79,6 +79,12 @@ writing, *isisd* does not support multiple ISIS processes.
    - wide
      Use new style of TLVs to carry wider metric. FRR uses this as a default value
 
+.. clicmd:: advertise-high-metrics
+
+   Advertise high metric value on all interfaces to gracefully shift traffic off the router. Reference: :rfc:`3277`
+   
+   For narrow metrics, the high metric value is 63; for wide metrics, 16777215; for transition metrics, 62.
+
 .. clicmd:: set-overload-bit
 
    Set overload bit to avoid any transit traffic.