From 81ed4699fd70cad2b133e5a239165e8afbc68517 Mon Sep 17 00:00:00 2001
From: Jonathan Bauer
Date: Fri, 8 Nov 2019 11:00:06 +0100
Subject: [slx-network] only replace route for same interface

---
 builder/modules.d/slx-network/scripts/udhcpc-trigger.stage4 | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/builder/modules.d/slx-network/scripts/udhcpc-trigger.stage4 b/builder/modules.d/slx-network/scripts/udhcpc-trigger.stage4
index b4dfeafa..d7009dc6 100755
--- a/builder/modules.d/slx-network/scripts/udhcpc-trigger.stage4
+++ b/builder/modules.d/slx-network/scripts/udhcpc-trigger.stage4
@@ -66,7 +66,11 @@ case "$1" in
 		ip addr add "$ip/$(ipcalc -s -p "$ip" "$subnet" | sed s/.*=//)" dev "$interface"
 		# Set default route, if given
 		if [ -n "$router" ]; then
-			ip route replace default via "$router"
+			# Only replace route if it's the same interface as the current default route, or we don't have any
+			current="$( ip route show | awk '{ if ($1 == "default") {print $5; exit 0}}' )"
+			if [ -z "$current" ] || [ "$interface" = "$current" ]; then
+				ip route replace default via "$router"
+			fi
 		fi
 		
 		# get domain, hostname and thus fqdn from DNS
-- 
cgit v1.2.3-55-g7522