doc: Update documentation to indicate *BSD struggles

*BSD has some special struggles associated with the graceful
restart code in zebra.  Add a bit of documentation to outline
this problem and how it is solved.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

diff --git a/doc/user/zebra.rst b/doc/user/zebra.rst
index 7ca473ceb657416dcb9fedb0e1318e84fc0ddaee..aa8c327b4bfad007e12afec624e6c42f7a9ae89b 100644 (file)
--- a/doc/user/zebra.rst
+++ b/doc/user/zebra.rst
@@ -29,6 +29,9 @@ Besides the common invocation options (:ref:`common-invocation-options`), the
    Zebra, when started, will read in routes.  Those routes that Zebra
    identifies that it was the originator of will be swept in TIME seconds.
    If no time is specified then we will sweep those routes immediately.
+   Under the *BSD's, there is no way to properly store the originating
+   route and the route types in this case will show up as a static route
+   with an admin distance of 255.
 
 .. option:: -r, --retain