Обрывы связи L2TP

Добрый день!
Пытаюсь настроить xl2tpd, но с одним Windows клиентом случаются постоянные разрывы соединения.
Лог

Nov  6 18:17:53 router xl2tpd[3750]: "/dev/pts/6"
Nov  6 18:17:53 router xl2tpd[3750]: Call established with 188.123.241.158, Local: 20245, Remote: 1, Serial: 0
Nov  6 18:18:53 router xl2tpd[3750]: check_control: Received out of order control packet on tunnel 1 (got 5, expected 4)
Nov  6 18:18:53 router xl2tpd[3750]: handle_packet: bad control packet!
Nov  6 18:20:53 router xl2tpd[3750]: check_control: Received out of order control packet on tunnel 1 (got 6, expected 7)
Nov  6 18:20:53 router xl2tpd[3750]: handle_packet: bad control packet!
Nov  6 18:20:58 router xl2tpd[3750]: Maximum retries exceeded for tunnel 20618.  Closing.

Конфиг xl2tpd.conf

[global]
port=1701
access control = no

[lns default]
ip range = 192.168.200.20 - 192.168.200.40
local ip = 192.168.200.1
assign ip = yes
refuse authentication = yes
name = GentooL2TP
pppoptfile = /etc/ppp/options.xl2tpd
tx bps = 100000000
rx bps = 100000000

options.xl2tpd

noccp
auth
crtscts
mtu 1410
mru 1410
nodefaultroute
lock
proxyarp
silent

Кто подскажет, что делать?? Бьюсь с этим уже 3й день..