diff --git a/PPPOE_management.md b/PPPOE_management.md
index 7d37644..a238b75 100644
--- a/PPPOE_management.md
+++ b/PPPOE_management.md
@@ -1,5 +1,9 @@
 # PPPoE management guide
 
+## Config system
+
+* *IMPORTANT* To save configuration like in cisco you need to issue command "gs save" (Cisco equivalent - write mem)
+* Config directory /etc/ is saved in /mnt/flash/config.tgz or /mnt/flash/secure2/config.tgz
 
 ## VLAN operations