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 b69230b99dc60a29a9913ddf43cc38abdb18a34d..1970f441e32da47793769da2234735595c4cb8be 100644 (file)
--- a/doc/user/ospfd.rst
+++ b/doc/user/ospfd.rst
@@ -752,7 +752,7 @@ 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.