Nick Howitt wrote:

Restoring a backup won't help. My connection can take a couple of minutes to reconnect but it is the same with or without kernel mode.

You can reverse the change by undoing the edit to iface.php then editing the ppp0 interface in IP Settings. Are you sure you got the correct password?

Note that to get vlan500 someone would have needed to do a special set up. What is the output to:What is the contents of /etc/sysconfig/network-scripts/ifcfg-ppp0?

DEVICE=ppp0
TYPE="xDSL"
USERCTL="no"
BOOTPROTO="dialup"
NAME="DSLppp0"
ONBOOT="yes"
PIDFILE="/var/run/pppoe-ppp0.pid"
FIREWALL="NONE"
PING="."
PPPOE_TIMEOUT="80"
LCP_FAILURE="5"
LCP_INTERVAL="20"
CLAMPMSS="1412"
CONNECT_POLL="6"
CONNECT_TIMEOUT="80"
DEFROUTE="yes"
SYNCHRONOUS="no"
ETH="eth0.500"
PROVIDER="DSLppp0"
PEERDNS="yes"
USER="MYISP LOGIN"
LINUX_PLUGIN="/usr/lib64/pppd/2.4.5/rp-pppoe.so"
MTU="1600"

yes im sure about the password i get it from ISP
i think my setting has changed.
i really dont know what to do coz setting up this was my friend before
and i dint not quite get that how to set it up back
im screwed up!