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From d511d7e60866060e260ec3f96b51a61c98c2c06f Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Thu, 21 Feb 2019 14:39:46 +0100
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Subject: [PATCH] man: ip-route.8: Document nexthop limit
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1624656
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Upstream Status: iproute2.git commit 6cd959bb125c5
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commit 6cd959bb125c50a04ab6671645fa38c5b07426f4
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Author: Phil Sutter <phil@nwl.cc>
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Date: Tue Nov 13 16:55:13 2018 +0100
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man: ip-route.8: Document nexthop limit
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Add a note to 'nexthop' description stating the maximum number of
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nexthops per command and pointing at 'append' command as a workaround.
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
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---
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man/man8/ip-route.8.in | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/man/man8/ip-route.8.in b/man/man8/ip-route.8.in
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index d6e06649a4640..d9a547748c017 100644
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--- a/man/man8/ip-route.8.in
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+++ b/man/man8/ip-route.8.in
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@@ -548,6 +548,15 @@ argument lists:
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route reflecting its relative bandwidth or quality.
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.in -8
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+The internal buffer used in iproute2 limits the maximum number of nexthops that
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+may be specified in one go. If only
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+.I ADDRESS
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+is given, the current buffer size allows for 144 IPv6 nexthops and 253 IPv4
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+ones. For IPv4, this effectively limits the number of nexthops possible per
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+route. With IPv6, further nexthops may be appended to the same route via
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+.B "ip route append"
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+command.
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+
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.TP
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.BI scope " SCOPE_VAL"
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the scope of the destinations covered by the route prefix.
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--
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2.21.0
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