AETHER-3366 Remove simpleovs CNI support

Change-Id: If7b9411b6dc4e4e06ee4cf75bf389faf066fb47a
diff --git a/5g-ran-sim/templates/bin/_gnbsim-run.sh.tpl b/5g-ran-sim/templates/bin/_gnbsim-run.sh.tpl
index bc5db92..e262373 100644
--- a/5g-ran-sim/templates/bin/_gnbsim-run.sh.tpl
+++ b/5g-ran-sim/templates/bin/_gnbsim-run.sh.tpl
@@ -16,10 +16,8 @@
 
 {{- if not .Values.config.gnbsim.singleInterface }}
 {{- range .Values.config.gnbsim.networkTopo }}
-ip route add {{ .upfAddr }} via {{ .upfGw }}
+ip route replace {{ .upfAddr }} via {{ .upfGw }}
+{{- end }}
 {{- end }}
 
-# Disabling checksum offloading to hardware
-ethtool -K enb tx off
-{{- end }}
 sleep infinity