REDIAL=${REDIAL:+lcp-echo-interval $REDIAL}
                IDLETIME=$(nvram get ppp_idletime)
                IDLETIME=${IDLETIME:+lcp-echo-failure $IDLETIME}
-               MTU=$(nvram get ppp_mtu)
-               MTU=${MTU:+ mtu $MTU mru $MTU}
+               MTUV=$(nvram get ppp_mtu)
+               MTU=${MTUV:+mtu $MTUV}
+               MRU=${MTUV:+mru $MTUV}
 
                ifconfig $IFNAME up
-               echo -e "plugin rp-pppoe.so\nconnect /bin/true\nusepeerdns\ndefaultroute\nuser \"$USERNAME\"\npassword \"$PASSWORD\"\n$MTU\n$IDLETIME\n$REDIAL" > /tmp/.pppoe-data
+               echo -e "plugin rp-pppoe.so\nconnect /bin/true\nusepeerdns\ndefaultroute\nuser \"$USERNAME\"\npassword \"$PASSWORD\"\n$MTU\n$MRU\n$IDLETIME\n$REDIAL" > /tmp/.pppoe-data
                /usr/sbin/pppd nodetach file /tmp/.pppoe-data $IFNAME
        done
 ) &