doc: Update documentation about multipath

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

diff --git a/doc/user/installation.rst b/doc/user/installation.rst
index 4e1582ccd8f8a2a57b924b6e89d1f61fd24c05b8..e191ebd0351262a6ffb62b0b36c4b3ef611ec748 100644 (file)
--- a/doc/user/installation.rst
+++ b/doc/user/installation.rst
@@ -275,7 +275,8 @@ options from the list below.
    For backwards compatability with older configure options when setting X = 0,
    we will build FRR with 64 way ECMP.  This is needed because there are
    hardcoded arrays that FRR builds towards, so we need to know how big to
-   make these arrays at build time.
+   make these arrays at build time.  Additionally if this parameter is
+   not passed in FRR will default to 16 ECMP.
 
 .. option:: --enable-shell-access