ppp use magic number to detect the lookback.
"Lookback" occurs often when the other side isn't up.
Try to add "-mn" in /etc/ppp/options
If the connection is still disconnect, it should be the other side's
problem.
----- Original Message -----
From: "Ulrich Holeschak" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, January 02, 2003 2:53 AM
Subject: Packet echo?
> Hello,
> i try to connect via L2TP a Win xp Pro client with a linux server (ipsec
> disabled, no authentication). Very often i get the "loopback error"
message
> on the xp client (but i have already "connect-delay 5000" in the ppp
option
> file).
> Now i have logged the telegrams at the xp client and i have seen, that
> really during connection startup all send packes are echoed (see log
> file)...
>
> I this correct? I think not...
>
> What could be the reason for this?
>
> XP client: 192.168.229.1
> Linux server: 192.168.229.10
>
> No. Time Source Destination Protocol
> Info
> 1 0.000000 VMware_c0:00:08 Broadcast ARP
Who
> has 192.168.229.10? Tell 192.168.229.1
> 2 0.040770 VMware_60:5e:65 VMware_c0:00:08 ARP
> 192.168.229.10 is at 00:50:56:60:5e:65
> 3 0.040846 192.168.229.1 192.168.229.10 L2TP
> Control Message - SCCRQ (tunnel id=0, session id=0)
> 4 0.062583 192.168.229.10 192.168.229.1 L2TP
> Control Message - SCCRP (tunnel id=4, session id=0)
> 5 0.062950 192.168.229.1 192.168.229.10 L2TP
> Control Message - SCCCN (tunnel id=5761, session id=0)
> 6 0.063020 192.168.229.1 192.168.229.10 L2TP
> Control Message - ICRQ (tunnel id=5761, session id=0)
> 7 0.063433 192.168.229.1 192.168.229.10 L2TP
> Control Message - ZLB (tunnel id=5761, session id=0)
> 8 0.065831 192.168.229.10 192.168.229.1 L2TP
> Control Message - ZLB (tunnel id=4, session id=0)
> 9 0.070162 192.168.229.10 192.168.229.1 L2TP
> Control Message - ICRP (tunnel id=4, session id=1)
> 10 0.070423 192.168.229.1 192.168.229.10 L2TP
> Control Message - ICCN (tunnel id=5761, session id=54410)
> 11 0.070489 192.168.229.1 192.168.229.10 L2TP
> Control Message - ZLB (tunnel id=5761, session id=0)
> 12 0.072492 192.168.229.10 192.168.229.1 L2TP
> Control Message - ZLB (tunnel id=4, session id=0)
> 13 0.111698 192.168.229.1 192.168.229.10 PPP LCP
PPP
> LCP Configuration Request
> 14 0.155804 192.168.229.10 192.168.229.1 L2TP
> Control Message - ZLB (tunnel id=4, session id=1)
> 15 0.163972 192.168.229.10 192.168.229.1 PPP LCP
PPP
> LCP Configuration Request
> 16 0.165077 192.168.229.1 192.168.229.10 PPP LCP
PPP
> LCP Configuration Nak
> 17 0.165685 192.168.229.10 192.168.229.1 PPP LCP
PPP
> LCP Configuration Nak
> 18 0.166496 192.168.229.1 192.168.229.10 PPP LCP
PPP
> LCP Configuration Request
> 19 0.167178 192.168.229.10 192.168.229.1 PPP LCP
PPP
> LCP Configuration Request
> 20 0.167864 192.168.229.1 192.168.229.10 PPP LCP
PPP
> LCP Configuration Nak
> 21 0.168913 192.168.229.10 192.168.229.1 PPP LCP
PPP
> LCP Configuration Nak
> 22 0.175045 192.168.229.1 192.168.229.10 PPP LCP
PPP
> LCP Configuration Request
> 23 0.187433 192.168.229.10 192.168.229.1 PPP LCP
PPP
> LCP Configuration Request
> 24 0.188903 192.168.229.1 192.168.229.10 PPP LCP
PPP
> LCP Termination Request
> 25 0.189780 192.168.229.10 192.168.229.1 PPP LCP
PPP
> LCP Termination Request
> 26 0.190551 192.168.229.1 192.168.229.10 PPP LCP
PPP
> LCP Termination Ack
> 27 0.203068 192.168.229.1 192.168.229.10 L2TP
> Control Message - CDN (tunnel id=5761, session id=54410)
> 28 0.318795 192.168.229.10 192.168.229.1 L2TP
> Control Message - ZLB (tunnel id=4, session id=1)
> 29 0.319068 192.168.229.1 192.168.229.10 L2TP
> Control Message - StopCCN (tunnel id=5761, session id=0)
> 30 0.319506 192.168.229.10 192.168.229.1 PPP LCP
PPP
> LCP Termination Ack
> 31 0.349571 192.168.229.10 192.168.229.1 L2TP
> Control Message - ZLB (tunnel id=4, session id=0)
> 32 5.485912 VMware_60:5e:65 VMware_c0:00:08 ARP
Who
> has 192.168.229.1? Tell 192.168.229.10
> 33 5.485979 VMware_c0:00:08 VMware_60:5e:65 ARP
> 192.168.229.1 is at 00:50:56:c0:00:08
>
> Thanks,
>
> Ulrich
>
>
