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From aa5313ca0e17bb08dd0629c3f9385672408caceb Mon Sep 17 00:00:00 2001
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From: Will Woods <wwoods@redhat.com>
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Date: Thu, 28 Aug 2014 13:44:47 -0400
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Subject: [PATCH] do 'ip route replace default' instead of 'add'
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When you define the gateway for an interface, dracut sets it up with:
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ip route add default via $gw dev $netif
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If a default route is already set (e.g. if you have multiple NICs), this
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will fail with the message "RTNETLINK answers: File exists".
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So, if your first NIC isn't usable as a default route
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Using "ip route replace default" instead allows ifup/dhclient-script to
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correctly change the default route to the new interface.
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---
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modules.d/40network/dhclient-script.sh | 2 +-
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modules.d/40network/ifup.sh | 2 +-
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2 files changed, 2 insertions(+), 2 deletions(-)
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diff --git a/modules.d/40network/dhclient-script.sh b/modules.d/40network/dhclient-script.sh
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index ba05250d..885303a2 100755
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--- a/modules.d/40network/dhclient-script.sh
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+++ b/modules.d/40network/dhclient-script.sh
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@@ -45,7 +45,7 @@ setup_interface() {
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valid_lft ${lease_time} preferred_lft ${lease_time} \
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dev $netif
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- [ -n "$gw" ] && echo ip route add default via $gw dev $netif > /tmp/net.$netif.gw
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+ [ -n "$gw" ] && echo ip route replace default via $gw dev $netif > /tmp/net.$netif.gw
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[ -n "${search}${domain}" ] && echo "search $search $domain" > /tmp/net.$netif.resolv.conf
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if [ -n "$namesrv" ] ; then
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diff --git a/modules.d/40network/ifup.sh b/modules.d/40network/ifup.sh
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index 43e84a2c..67b1d9f8 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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@@ -145,7 +145,7 @@ do_static() {
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ip addr add $ip/$mask ${srv:+peer $srv} brd + dev $netif
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fi
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- [ -n "$gw" ] && echo ip route add default via $gw dev $netif > /tmp/net.$netif.gw
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+ [ -n "$gw" ] && echo ip route replace default via $gw dev $netif > /tmp/net.$netif.gw
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[ -n "$hostname" ] && echo "echo $hostname > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
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return 0
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