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25 lines
876 B
25 lines
876 B
6 years ago
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From 38180271c587f3053710bf38a6cda829d3a7c00f Mon Sep 17 00:00:00 2001
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From: Harald Hoyer <harald@redhat.com>
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Date: Tue, 18 Aug 2015 12:07:41 +0200
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Subject: [PATCH] network/ifup.sh: arping for static IPv4 addresses
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---
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modules.d/40network/ifup.sh | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/modules.d/40network/ifup.sh b/modules.d/40network/ifup.sh
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index ab87578e..8a5a6065 100755
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--- a/modules.d/40network/ifup.sh
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+++ b/modules.d/40network/ifup.sh
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@@ -163,6 +163,10 @@ do_static() {
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ip addr add $ip/$mask ${srv:+peer $srv} dev $netif
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wait_for_ipv6_dad $netif
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else
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+ if ! arping -f -q -D -c 2 -I $netif $ip; then
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+ warn "Duplicate address detected for $ip for interface $netif."
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+ return 1
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+ fi
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ip addr flush dev $netif
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ip addr add $ip/$mask ${srv:+peer $srv} brd + dev $netif
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fi
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