doc: add param range for graceful-restart helper supported-grace-time

Signed-off-by: Bing Shui <652023330037@smail.nju.edu.cn>
(cherry picked from commit 588b6421433ec0ffbe0d5fbc9ba68126e78d2935)

diff --git a/doc/user/ospfd.rst b/doc/user/ospfd.rst
index 3430d8a28200830b692e1b405fe4c6ff74ca4b5e..757cbf70216f6cc267cd10c25da93de62de6aed7 100644 (file)
--- a/doc/user/ospfd.rst
+++ b/doc/user/ospfd.rst
@@ -812,7 +812,7 @@ Graceful Restart
    affects the restarting router.
    By default 'strict-lsa-checking' is enabled"
 
-.. clicmd:: graceful-restart helper supported-grace-time
+.. clicmd:: graceful-restart helper supported-grace-time (10-1800)
 
 
    Supports as HELPER for configured grace period.