From b99d3fd8b5a7dd140a2b4c7a7e70aea7478634f7 Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Mon, 26 Nov 2018 19:11:55 +0100
Subject: [PATCH] man: ip-route.8: Document nexthop limit

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1625358
Upstream Status: iproute2.git commit 6cd959bb125c5

commit 6cd959bb125c50a04ab6671645fa38c5b07426f4
Author: Phil Sutter <phil@nwl.cc>
Date:   Tue Nov 13 16:55:13 2018 +0100

    man: ip-route.8: Document nexthop limit

    Add a note to 'nexthop' description stating the maximum number of
    nexthops per command and pointing at 'append' command as a workaround.

    Signed-off-by: Phil Sutter <phil@nwl.cc>
    Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 man/man8/ip-route.8.in | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/man/man8/ip-route.8.in b/man/man8/ip-route.8.in
index b21a847..e464353 100644
--- a/man/man8/ip-route.8.in
+++ b/man/man8/ip-route.8.in
@@ -589,6 +589,15 @@ argument lists:
 route reflecting its relative bandwidth or quality.
 .in -8
 
+The internal buffer used in iproute2 limits the maximum number of nexthops that
+may be specified in one go. If only
+.I ADDRESS
+is given, the current buffer size allows for 144 IPv6 nexthops and 253 IPv4
+ones. For IPv4, this effectively limits the number of nexthops possible per
+route. With IPv6, further nexthops may be appended to the same route via
+.B "ip route append"
+command.
+
 .TP
 .BI scope " SCOPE_VAL"
 the scope of the destinations covered by the route prefix.
-- 
1.8.3.1