From: Jacob Wen <jian.w.wen@oracle.com>
Date: Tue, 26 Nov 2019 07:50:36 +0000 (+0800)
Subject: 35network-legacy: using 'replace' instead of 'add' to add route
X-Git-Tag: 050~72
X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fdracut.git;a=commitdiff_plain;h=d5e818f3490e8840f56de03ba92297f44e507be2

35network-legacy: using 'replace' instead of 'add' to add route

This is a simple trick to honor RFC 3442:
If the DHCP server returns both a Classless Static Routes option and
a Router option, the DHCP client MUST ignore the Router option.

Signed-off-by: Jacob Wen <jian.w.wen@oracle.com>
---

diff --git a/modules.d/35network-legacy/dhclient-script.sh b/modules.d/35network-legacy/dhclient-script.sh
index 66cfe34bf..04cabb3c0 100755
--- a/modules.d/35network-legacy/dhclient-script.sh
+++ b/modules.d/35network-legacy/dhclient-script.sh
@@ -146,7 +146,7 @@ parse_option_121() {
             temp_result="$destination via $gateway dev $interface"
         fi
 
-        echo "/sbin/ip route add $temp_result"
+        echo "/sbin/ip route replace $temp_result"
     done
 }