From 010f9c700c20510749d6b435fe4962ac822c6456 Mon Sep 17 00:00:00 2001
From: DmitriyEshenko <dmitriy.eshenko@vyos.io>
Date: Thu, 28 May 2020 09:58:37 +0000
Subject: link-detect: T2517: Check if link_filter file exist

---
 scripts/vyatta-link-detect | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scripts/vyatta-link-detect b/scripts/vyatta-link-detect
index ff3886e2..72874571 100755
--- a/scripts/vyatta-link-detect
+++ b/scripts/vyatta-link-detect
@@ -18,7 +18,9 @@ fi
 #   1 - ignore receive if admin_down
 #   2 - ignore receive if admin_down or link down
 set-sysctl () {
-    sudo sh -c "echo $2 >/proc/sys/net/ipv4/conf/$1/link_filter"
+    if [ -f /proc/sys/net/ipv4/conf/$1/link_filter ]; then
+        sudo sh -c "echo $2 >/proc/sys/net/ipv4/conf/$1/link_filter"
+    fi
 #   sudo sh -c "echo $2 >/proc/sys/net/ipv6/conf/$1/link_filter"
 }
 
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